halong shipyard quality standard book 1
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VIET NAM SHIPBUILDING INDUSTRY COrPORATIONHA LONG SHIPBUILDING COMPANY
HA LONG SHIPBUILDING COMPANY
QUALITY STANDARD
BOOK 1
H¹ LONG 2006
- 1 -
This HLSQS describes the quality standards and the inspection practice which are
applied during repair and building ship process in HA LONG SHIPBUILDING Co.
This document is intended to provide standard instructions to Ship Owners, Class
Surveyors, QC, inspectors, and the production workers, aiming that proper quality level
is maintained during repair and building ship process and eliminating any possible,
disputes among them.
The contents of this documents are applied for all kinds of cargo ships, barges,
drilling rigs & special purpose etc. unless additional requirement are specified in the
contract specifications.
HALONG SHIPBUILDING Co.
preface
- 2 -
HALONG SHIPBUILDING Co.
* * contents * *
* * contents * *
Part i: quality standard …………………………… 1
1. hull construction
2. hull out fittings
3. machinery & out fittings
4. piping system
5. painting part
6. electric part
part II: inspection practice …………………………… 155
1. hull inspection
2. out fittings inspection
3. machinery inspection
4. piping inspection
5. electric inspection
6. painting inspection
7. list of inspection/test
part III N.D.E technique...................................................... 210
part IV appendix – I .............................................................. 225
part V appendix - II ............................................................ 256
- 3 -
HALONG SHIPBUILDING Co.
part I
quality standard
- 4 -
Halong shipbuilding co.
HALONG SHIPBUILDING Co.
Section 1 Hull construction
1.1 material ........................................................................................... 5
1.2 gas cutting ..................................................................................... 7
1.3 fabrication..................................................................................... 9
1.4 deformation................................................................................... 12
1.5 accuracy of hull form ........................................................... 15
1.6 welding ............................................................................................. 17
1.7 alignment & finishing............................................................... 20
1.8 welding technique ..................................................................... 30
- 5 -
HALONG SHIPBUILDING Co.
section IHull
construction* shipbuilding &
repair
1.1 Material
1.1.1 Surface flaw
1) Pit
Item Remarks
1. Grade A: Repair is unnecessary
2. Grade B:
1) Outer surface of shell plates. To be repaired by
grinding if necessary.
When painting with epoxy can not be done, grinding is
to be carried out.
2) Others: Repair unnecessary.
3. Grade C: To be repaired by grinding
4. Grade D: Repair method is to be determined after
discussion with owner and class.
* Recommended repair method: Grinding followed
by welding.
Area ratio (%) = 100xplateaofareaTotal
pitofArea
2) Flaking:
Item Remarks
1. Grade A: Repair is unnecessary
2. Grade B: Repair if necessary.
3. Grade C: Repair is necessary
* Repair method (d=depth of defects )
1) d 0.07t (max 3mm)- Grinding
2) 0.07t < d 0.2t: Welding and grinding ( The welded
area should be less than 2% of the total area of a plate ).
- 6 -
3) Other defects
Item Remarks
1. Grade A: Repair is unnecessary.
2. Grade B: Repair is necessary.
* Repair method (d=depth of defects )
1) d 0.07t (max 3mm): Grinding.
2) 0.07t < d0.2t: Welding and grinding. ( The welded
area should be less than 2% of the total area of a plate ).
1.1.2) Lamination
Item Remarks
Local
lamination
In case where the range lamination is
limited, it can be chipped out and built up
by welding as shown in ( a ).
In case where the range of lamination is
limited, also but is near the plate surface,
it is preferable to make the built up
welding as shown in ( b ).
Severe
lamination
requiring a local
renew of a plate
It is recommended to renew the plate
locally, in case where the range of
lamination is fairly extensive.
The standard minimum breadth of a plate
to be renewed is as below.
1) Shell and strength deck under large
constraint : 1600mm
2) Not under large constraint: 800mm
3) Other structural members: 300mm.
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding &
repair
- 7 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
1.2 Gas cutting.
1.2.1 Notches. Unit: mm
Item Standardrange
Tolerancelimits
1) Upper edges of sheer strake.
2) Strength deck within 0.6L and free
edges of opening of shell plate.
3) Main longitudinal strength members.
Indentation 5.0
Longitudinal and transverse strength
members.
Indentation 0.1
Free edges
Others Indentation 3
Shell plate and upper deck
within 0.6L
Indentation 2Butt welds
Others Indentation 3
Weld grooves
Fillet welds Indentation 3
Section 1. Hull construction * ship repair
1.2.1 Notches for repair ship Unit: mm
Item Standardrang
Tolerancelimits
1) Upper edges of sheer strake
2) Strength deck within 0.6L and
free edges of opening of shell plate.
3) Main longitudinal strength member.
Indentation 0.1
Longitudinal transverse strength Indentation 5.1
Free edges
Others Indentation 3
Shell plate and upper deck
within 0.6LIndentation 2
Butt welds
Others. Indentation 3Weld grooves
Fillet welds Indentation 3
- 8 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
1.2.2 Dimensions
Item Standardrange
Tolerancelimits
Length of taper
( L)
L 3d
0.5d 1.0d
Depth of
grooves 1.5 2.0
General members compared with correct
ones. 3.5 5.0
Depth of floors and girders in double
bottom 2.5 4.0
Sizes of
members
Breadth of face bars 2.0 3.0~4.0
Section 1 Hull construction * ship repair
1.2.2 Dimension for repair ship.
Item Standardrange
Tolerancelimits
Length of taper
(L)
L 3d
0.5d 0.1d
Depth of grooves 2.0 3.0
- 9 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding &
repair
1.3 Fabrication.
1.3.1 Flange longitudinals Unit: mm
Item Standardrange
Tolerancelimits
Breadth of webs
and flanges 3.0 5.0
Angle between
flange and websCompared with template per 100mm
in breadth of flanges
2.5 4.5
Curvature or
straightness in the
plane of flanges
Per 10m in length
10 25
Curvature of
straightness in the
plane of webs.
Per 10m in length
10 25
1.3.2 Flange brackets.
Item Standardrange
Tolerancelimits
Breadth of
webs and
flanges
3.0 5.0
Angle between
flanges and
webs Compared with template per
100mm in breadth of flanges.
3.0 5.0
- 10 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
1.3.3 Built-up plate. Unit: mm
Item Standardrange
Tolerancelimits
Frames and
longitudinals
Deviation of face plates
1.5
per 100mm
3.0 per
100mm
Distortion of face
plates 1003
ba
1005
ba
Section 1 Hull construction * ship repair
1.3.3 Built – up plates for repair ship Unit: mm
Item Standardrange
Tolerancelimits
Fames and
longitudinals
Deviation of face plates
3.0 per
100mm
5.0 per
100mm
Distortion of face
plates 1005.3
ba
1006
ba
- 11 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding &
repair
1.3.4 Line heating method
Item Standardrange
Tolerancelimits
Water cooing just after heating Under 6500C
Air cooling after heating Under 9000C* 50 HT
* TMCP Type
50HT
(Ceq>0.38%)
Air cooling and subsequent water
cooling after heating
Under 9000C
(Starting
temperature of
water cooling
to be under
5000C)
* TMCY Type
50HT
(Ceq 0.38%)
* AH~DH
Water cooling just after heating or
air coolingUnder 1000C
* TMCP Type
50HT
(Ceq 0.38%)
* EH
Water cooling just after heating or
air cooling.Under 900oC
1.3.5. Line heat/ cool’ cycles.
Item Remark
TMCP Type 50HT
(AH - DH)Within 3 cycles as far as practicable
TMCP Type 50HT
(EH)Within 2 cycles as far as practicable
Others Not defined
- 12 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
1.4 Deformation
1.4.1.Unfairness Unit: mm
Item Standardrange
Tolerancelimits Remarks
Parallel part ( side ) 4 6
Parallel part ( bottom ) 4 6Shell plates
Fore and aft part 5 7
Double bottom
tank top plates4 6
Bulkheads
Longitudinal bulkheads,
Transverse bulkheads, Swash
bulkheads.
6 8
Parallel part within 0.6L 4 6
Fore and aft part 6 9Strength deck
Covered part 7 9
Bare part 6 8Second deck
Covered part 7 9
Bare part 4 6Forecastle deck,
Poop deck. Covered part 7 9
Bare part 4 6Super structure
deck Covered part 7 9
Lift-able 10 12Car deck
Fixed 6 8
Intermediate deck 8 10
Outside walls 4 6
Inside walls 4 6Deck house wall
Covered part 7 9
Interior membersWebs of girders, transverses 5 7
Floors and girders
in double bottom6 8
Standard and/or
tolerance limits
are to be applied
per each frame,
longitudinal and
stiffener space
respectiveily.
Where above is
not applicable , it
is to be applied
per 1.8m in
length.
(Where above
space is over
1.8m paragraph
1.4.2 is to be
applied)
- 13 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* ship repair
1.4.1 Unfairness for repair ship
Item Standardrange
Tolerancelimits Remarks
Parallel part side 4 6
Parallel part bottom 4 6
Shell plate
Fore and aft part 5 7
Double bottom
tank top plates6 6
Bulkheads Longitudinal bulkheads
transverse bulkheads, Swash
bulkheads.
6 8
Paralleled part with in 0.6L 4 6
Fore and aft part 6 9
Strength deck
Covered part 7 9
Bare part 6 8Second deck
Covered part 7 9
Bare part 4 6Forecastle deck,
poop deck Covered part 7 9
Bare part 4 6Super structure
deck Covered part 7 9
Car deck 10 12
Intermediate 8 10
Outside walls 4 6
Inside walls 4 6
Deck house wall
Covered part 7 9
Interior member Webs of girders, trans.5 7
Floors and girders
in double bottom6 8
Standard and/or
tolerance limits
are to be applied
per each frame,
longitudinal and
stiffener space
respectiveily.
Where above is
not applicable , it
is to be applied
per 1.8m in
length.
(Where above
space is over
1.8m paragraph
1.4.2 is to be
applied))
- 14 -
HALONG SHIPBUILDING Co.
section IHull
construction* shipbuilding
& repair
1.4.2 Deformation per basic length Unit: mm
Item Standardrange
Tolerancelimits Remarks
Parallel part 2L/1.000 3L/1.000Shell plates
Fore and aft part 3L/1.000 4L/1.000
Decks, Double
bottom tank tops3L/1.000 4L/1.000
Bulkheads 4L/1.000 5L/1.000
Cabin walls 2L/1.000 3L/1.000
Curtain plates 2L/1.000 3L/1.000
Deformation per basic
length means the
deformation measured
between one transverse
space.
For cabin walls and
curtain plates, the basic
length is about 5m.
1.4.3 Distortion Unit: mm
Distortion of
girder and
transverses at the
part of upper edge
and flange.
Per span 5 8
L 1000 5 8
1000<L<35001000
23
L
1000
26
L
Distortion of
longitudinals,
transverses,
frames, beams
and stiffener at
the part of flange .
L 3500 10 13
Distortion of H
type pillars
between decks5 8
Distortion of
tripping brackets
and small
stiffeners.
Distortion at the
part of free
edges
1/2t t~
- 15 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.5 Accuracy of hull form
1.5.1 Principal dimension
Item Standard range Tolerance limits
L.B.P. 50/100m Not defined
Breadth ( Moulded ) 15 Not defined
Depth ( Moulded ) 10 Not defined
1.5.2 Deformation of hull form Unit: mm
Item Standardrange Tolerance limits
Flatness of keel Deformation for the whole length 25 Not defined
30 Not defined
Cocking-up
20 Not defined
Rise of floor
Rise of floor amid ships
15 Not defined
1.5.3 Others
Unit: mm
Item Standardrange Tolerance limits
Draft marks 1.0 2.0
Free board marks 0.5 1.0
- 16 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.5.4 Special sub-assembly
ItemStandard
range
Tolerance
limitsRemarks
Distance between aft
edge of boss and aft peak
bulkhead ( b).
5 10
Twist of sub-assembly
(c)5 10
Deviation of rudder from
shaft center line ( d )4 8
(C)Twist of plane including
Blo
ck s
ub-a
ssem
bly
ster
n fr
ame
Others Refer to the section of curved plate block
Twist of rudder plate 6 10 Correct or re-assemble partially
Rud
der
OtherRefer to the section of the curved plate block sub-
assembly
Flatness of top plate of
main5 10
Breadth and length of top
plate of main engine bed 4 6
Mai
n en
gine
bed
Others Refer to the section of the flat plate block sub-assembly
- 17 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding &
repair
1.6 Welding
1.6.1 Shape of bead
ItemTolerance
limitsRemarks
Butt
Over-lap
Fillet
090
1. 090 : Repair
is unnecessary
2. In case 090 ,
grinding or welding
in necessary to
make 090
Skin
plates
and face
plates
within
0.6L
d 0.5
(over
90mm
continuous)
Butt
Others d 0.8
Undercut
Fillet d 0.8
To be repaired by
using fine electrode
( Avoid short beads
for higher tensile
steel )
Leg length
and Throat
thickness L 0.9L0
t 0.9t0
L0: Design leg
length
t0: Design throat
thickness
- 18 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& Repair
1.6.2 Distortion of welding joints Unit: mm
ItemTolerance
limitsRemarks
Skin plates within
0.6L
6
Fore and aft shell
plating and
transverse strength
member
7
Angular
distortion of
weld joints
Span of frames or
beams Others 8
In case where it is
over tolerance
limits, it is to be
repaired by line
heating or re-
welded after
cutting and
refitting
1.6.3 Short beads Unit: mm
Item Tolerance limits Remarks
Higher tensile steel ( 50kg/mm2 class ) 50
TMCP type 50HT (Ceq 0.36%) 10
Mild steel( including take and repair welding ) Not defined
1.6.4 Arc strike Unit: mm
Item Tolerance limits Remarks
Higher tensile steel ( 50kg/mm2
class ) and grade “ E “ of mild
steel.
Not allowed In case where arc strike made
erroneously, one of the following
repair methods is applied.
1) Weld over 50mm bead on the arc
strike.
2) Remove the hardened zone by
grinding.
1.6.5 Alternation case
ItemAcceptable
limitsRemarks
Short bead & Arc strike of Higher
tensile steel.
10 In case of during repair, building up
on surface after discussion with class
& owner.
1) To be preheating at fault areas.
- 19 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.6.6 Weld profile
1) Concave bead Unit:
Tolerance limits Remarks
Unacceptable L=min 0
2) Convex bead
Max 1.6
L 8
Max 3.0
8 L 25
Max 4.5
25 L
3) Division of position
Manual weldingMachine
welding
PlatVertical &
horizontalOverhead
H 3.0mm H 4.0mm H 4.5mm
H 4mm
4) Bead repair
It the bead height is over the standard range which shows bad appearance, the bead will be
repaired by grinding.
- 20 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7 Alignment and finishing
1.7.1 Minimum distance of weld to adjacent weld Unit: mm
ItemTolerance
limitsRemarks
a 30
Butt
weld
to butt
weld
a 0
a 10
a 0Butt
weld
to
filler
weld
a 5
Smaller distance can be
acceptable in special
cases.
- 21 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.2 Minimum distance between holes and between hole and end of member.
Distance ( s)Description
“A” Space “B” SpaceRemarks
1) Between holes
2
21 dd d1+d2
2) Between hole and plate, and face
)75..(
22
1
nmi
dS
dS
S1=d
S2=2d
(min. 75)
3) Between hole and scallop
)50.(min2
21 dd d+R
(min. 50)
4) Between hole and slot
2
Bd d+B
s 200 (ABS)
s 180 (LR)
s D (NK)
5) Between slots
s1 2B
s2 2d and
s2 2B
- 22 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.3 Treatment of holes made erroneously.
ItemTolerance
limitsRemarks
A* Open the hole to over 100Skin plate
Or B* Open the hole to over 300
B* Open the hole to over 300
D<300
(D: diameter of holes )
Other
or C* Open the hole to over 100
Skin plate B*d 300
Others B* or C*
Scallop, slot B* or C*
* Method of treatment
A: spigot patch
0
5040
B: Closing by butt welding with back gouging
0
5040
C: Closing by lapping piece
L 50 or L 2t1+25
Whichever is greater
- 23 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.4 Gap of joints Unit: mm
ItemTolerance
limitsRemarks
1. Manual welding
a 5
1. 5<a 16
1) Welding with backing strip or flat type
ceramic back material.
2) Welding at reverse side after chipping.
2. 16<a 25
1) Build-up edges with backing strip of
flat type ceramic backing material to keep
the gap less than 5mm ( make stringer
beads )
2) Welding.
3) Welding at reverse side after shipping
3. a>25
Repair method is to be determined after
discussion with owner & class. Normally
partial renew by min. size 300mm is
applied.
Butt
joints
2. Flexible asbestos
Backing ( F.A.B )
a 5
a>5
1) First or second pass by FCAW or
GMAW as shown in 1.7.4 item 4.
2) The rest by automatic (SAW)
- 24 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.4 Gap of joints Unit: mm
ItemTolerance
limitsRemarks
3. Submerged Arc welding
(S.A.W)
a 8
1. 0.8<a a 5: Make sealing bead.
2. a>5: Refitting
Butt
joints
4. F.C.A.W and G.M.A.W
a 12
1. 12< a 25
1) Build-up on edges with backing
strip of flat type ceramic backing
material to keep the gap within
12mm ( to make stringer beads.)
Build-up on the edges should not
exceed 1/2t1 . nor 12.5mm whichever
is smaller.
2) Welding.
2. a>25
Repair method is to be determined
after discussion with owner & class.
Normally partial renew by min. size
of 300mm is applied.
- 25 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.4 Gap of joints Unit: mm
ItemTolerance
limitsRemarks
Fillet
Joints
1. Filler joints without
groove
t1 t2a 3
1. 3< a 5
Leg length to be increased: L=L0+(a-3)
(L: increased leg length)
(L0: Leg length indicated on drawing )
2. 5< a 16
Welding with bevel preparation
(1) To make bevel edge of web to 300~450
(2) To attach backing strip or ceramic
backing material.
(3) Welding.
(4) To weld at reverse side after chipping.
3. 16< a 25
1) Bevel preparation (300~450)
2) Build-up of each plate edge should not
exceed 1/2t1 nor 12.5mm whichever is
smaller.
Gap after build-up should not exceed
5mm.
4. a>25
Partial renew with a size of min. 300mm
- 26 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.4 Gap of joints Unit: mm
ItemTolerance
limitsRemarks
Fillet
joints
2. Fillet joints with
groove
a 5
1. 5< a 16
1) To attach backing strip or ceramic
backing material.
2) Welding
3) To weld at reverse side after chipping.
2. 16< a 25
Build-up of base plate
Gap after build-up should not exceed
5mm.
3. Partial renew with a size of min.
300mm.
Lap
joints
a 3 1. 3< a 5
Leg length shall be increased by the
amount of gap ( indicated leg length gap )
2. a>5
Refitting.
- 27 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.5 Alignment
Item Tolerance limits
Strength
members
a 0.15t1,
(max.3)
a>0.15t1, or a>3
Refitting
Butt joints
a: Difference
t1 t2
Othersa 0.2t1
(max.3)
a>0.2t1, or a>3
Refitting
Strength
members
a 1/3t 1. 1/3t1<a 1/2t1
Leg length to be increased.
For “A” & “B”, increase leg length by
10%t1.
2. a>1/2t1: Refitting
* For members having small breadth ( i.e.
face plate of built-up member ), doublers
or carling can be attached after discussion
with owner & class.
Fillet joints
a: Difference
t1 t2
Others a 1/2t1 a>1/2t1
Refitting
- 28 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.5 Alignment
Item Tolerance Remarks
Alignment of butt
joints in stiffeners
Flange width
s 0.04b
max. 8mm
If s 0.08b
Grind corners to
smooth. Taper over
distance min.
L=30s
If s>0.08b release and
adjust over distance
min.
L=50s
Overlap brackets, gap
before manual
welding
For weld
throat
thickness
a 4mm
Gap s 2mm
for a>4mm
s 3mm
If s 5mm
Parts may be pulled
together and welded
If s>5mm
Release and adjust
- 29 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.7.5 Alignment
Item Tolerance Remarks
1. Position of nearest scallop
d 75mm
If d>75mm
The nib between scallop
and opening to be cut,
and lug to be welded to
plating, see figure
Openings for
stiffeners passing
through girder webs
2. Gap
s 3mm
s 3mm
s 5mm. Weld throat
thickness to be increased
by one weld bead or
2mm.
If 5<s 10mm.
Chamfer and build up by
welding.
If s>10mm. Cut off nib
and fit lug of same height
as nib.
Sufficient for weld
access.
- 30 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.8 Welding technique
1.8.1 Welding sequence
1. Welding sequence is to be carefully planned for each structural member. So that the parts can be
jointed freely without any deformation or residual stress after welding.
2. Welding sequence for each part actually have some varieties depending upon the surrounding
circumstances, but in principle, the following sequences are to be kept at every welding stages.
1) Welding is proceeded symmetrically from center of joint both sides. E. G. incase of erection joint.
Welding should be done from a mid-ship to stem or stern and from center line of the ship to the
direction of side shell.
2) The part where the deformation or residual stress is anticipated to be welded first, and then others to
be done secondly.
3. Welding sequence is generally adopted from be assembly stage.
1) Welding of panel.
2) Butt joints are welded prior to welding of seam line.
- 31 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
2) Welding of profiles on panel
Note that a release length of 100mm is provided in the horizontal seams at each corner of the insert
plate.
1. Weld framing to within 100mm of un-welded butts and seams.
2. Weld vertical butt complete
3. Weld vertical butt complete
4. Weld un-welded framing in way of vertical butts
5. Weld horizontal seam including release lengths
6. Weld horizontal seam including release lengths
7. Weld un-welded framing in way of horizontal seams
- 32 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
3) Welding of insert
- 33 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
4) Penetration parts
- 34 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.8.2 Slot welding
Symbol Application for thickness Kind of plate
t 50.5 All
t<16.0
w=t
t+8 2.25w
L<10.0w
p>2L
Det
ails
of
wel
d jo
ints
t 16.0
w t/2 vµ w 16
t+8 2.25w
L<10.0w
p>2L
Beveled angle Position welding Application of member
00 All All
- 35 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.8.3 Bilge keel joint weld
Welding detail ( For all type )
- 36 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.8.4 Stern frame structure
1) Thicker material ( build-up )
Joint Details of Cast Steel Stern Frame
2) Butt joints
Details of butt joints of steel castings/ Forgings and steel plates
3)Lap joints
Details of Lap joints of steel Casting/ Forging and Steel plates
- 37 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.8.5 Butt welding on permanent backing
- In case where it is method are to be applied, after discussion & approved with class and owner.
Unit: mm
Item Tolerance limits Remarks
t 8 3 – 5
8<t 20 5 – 8
t<20 8 – 10
* Size of backing plates
- Normal: 6 - 10
- 38 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* shipbuilding
& repair
1.8.6 Pre-heating of before welding
1) Environment
Proper precaution are to be taken to insure that all welding is done under condition where the welding
site is protected against the deleterious effects of moisture, wind and severe cold.
2) Method
The use of preheat control are to be considered when higher strength steels, thicker cross section and
subject to high restraint.
- Range of heating areas: Min.75mm from weld points.
- Heating direction: all direction
Item Which is heat temp’Control of heat
temp’Remarks
Mild steel -50C Min 160C
Min 160CH.T steel 00C
Min 500C - Thicker plate
- Restaint structure
TMCP type
(Ceq 0.36)
-50C Min 200C
- 39 -
HALONG SHIPBUILDING Co.
Section 1Hull
construction* modification
1.8.7 Bulb plate modification method
Existing L2 Type
* C=15 mm
L3 type
* C=15 mm
Joint detail ( L3 type )
Looking down
- 40 -
xcx
HALONG SHIPBUILDING Co.
Section 1Hull
construction* modification
* Size comparative sheet
Bulb plate L3 Type L2 TypeID.N
HT B T Area HT B T1 T2 A HT B T1 T2 A
(mm) (mm) (mm) (Cm2) (mm) (mm) (mm) (mm) (Cm2) (mm) (mm) (mm) (mm
)
(Cm2)
1 140 19.0 7 12.6 155 20 7 10 12.85 140 50.0 7 10 14.12 140 19.0 8 13.8 155 20 8 10 15.6 140 50.0 8 10 15.43 140 19.0 9 15.2 155 20 9 10 17.3 140 50.0 9 10 16.74 160 22.0 7 14.6 175 25 7 10 15.8 160 50.0 7 10 15.55 160 22.0 8 16.2 175 25 8 10 17.7 160 50.0 8 10 17.06 160 22.0 9 17.8 175 25 9 10 19.6 160 50.0 9 10 18.57 180 25.0 8 18.9 195 25 8 10 19.3 180 50.0 8 10 18.68 180 25.0 9 20.7 195 25 9 10 21.4 180 50.0 9 10 20.39 180 25.0 10 22.5 195 25 10 10 23.5 180 50.0 10 10 22.010 180 25.0 11 24.3 195 25 11 10 25.6 180 50.0 11 10 23.711 200 28.0 9 23.8 215 30 9 15 25.2 200 50.0 9 12 22.912 200 28.0 10 25.6 215 30 10 15 27.5 200 50.0 10 12 24.813 200 23.0 11 27.6 215 30 11 15 29.8 200 50.0 11 12 26.714 200 23.0 12 29.6 215 30 12 15 32.1 200 50.0 12 12 28.315 220 31.0 10 29.0 235 30 10 15 29.5 220 60.0 10 12 28.016 220 31.0 11 31.2 235 30 11 20 33.5 220 60.0 11 12 30.117 220 31.0 12 33.4 235 30 12 20 36 220 60.0 12 12 32.218 240 34.0 10 32.4 255 35 10 20 34 240 60.0 10 15 32.519 240 34.0 11 34.9 255 35 11 20 36.7 240 60.0 11 15 33.820 240 34.0 12 37.3 255 35 12 20 39.4 240 60.0 12 15 36.021 260 37.0 11 36.7 275 30 11 20 39.9 260 60.0 11 20 38.422 260 37.0 11 36.7 275 40 11 20 39.9 260 60.0 11 20 38.423 260 37.0 13 43.9 275 40 13 20 45.7 260 60.0 13 20 43.224 280 40.0 11 42.6 295 40 11 25 44.1 280 62.0 11 20 41.925 280 40.0 12 45.5 295 40 12 25 47.2 280 62.0 12 20 48.626 280 40.0 13 48.2 295 40 13 25 50.3 280 70.0 13 20 47.827 300 43.0 11 46.7 315 40 11 30 48.3 300 75.0 11 20 45.828 300 43.0 12 49.7 315 40 12 30 51.6 300 75.0 12 20 48.629 300 43.0 13 52.8 315 40 13 30 54.9 300 75.0 13 20 51.430 300 46.0 14 55.8 315 40 14 30 58.2 300 80.0 14 20 55.231 320 46.0 12 54.2 335 45 12 30 55.5 320 80.0 12 20 52.032 220 46.0 13 57.4 335 45 13 30 59 320 85.0 13 20 56.033 320 46.0 14 60.7 335 45 14 30 62.5 320 85.0 14 20 59.034 320 49.0 15 63.9 335 45 15 30 66 320 85.0 15 20 62.035 340 49.0 12 59.8 355 50 12 32 60.4 340 90.0 12 20 56.436 340 49.0 13 62.2 355 50 13 32 64.1 340 90.0 13 20 59.637 340 49.0 14 65.5 355 50 14 32 67.8 340 90.0 14 20 62.838 340 49.0 15 68.9 355 50 15 32 71.5 340 90.0 15 20 66.039 370 53.5 13 69.6 385 60 13 32 71.2 370 90.0 13 25 67.440 370 53.5 14 73.3 385 60 14 32 75.2 370 90.0 14 25 70.841 370 53.5 15 77.0 385 60 15 32 79.2 370 90.0 15 25 74.342 370 53.5 16 80.7 385 60 16 32 83.2 270 90.0 16 25 77.743 400 58.0 14 81.4 415 65 14 35 82.95 400 90.0 14 30 78.844 400 58.0 15 85.4 415 65 15 35 87.25 400 90.0 15 30 82.545 400 58.0 16 89.4 415 65 16 35 91.55 400 90.0 16 30 86.246 400 58.0 17 93.4 415 65 17 35 95.85 400 90.0 17 30 89.947 430 62.5 15 94.1 445 75 15 35 95.25 430 95.0 15 35 92.548 430 62.5 17 103.0 445 75 17 35 104.5 430 95.0 17 35 100.449 430 62.5 19 111.0 445 75 19 35 113.7 430 95.0 19 35 108.350 430 62.5 21 126.0 445 75 21 35 122.9 430 95.0 21 35 116.2
- 41 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting
2.1 hatch cover ................................................................................. 42
2.2 hatch coaming ........................................................................... 50
2.3 small hatch .................................................................................. 52
2.4 air vent system .......................................................................... 53
2.5 steel inclined ladder……………………………………… 54
2.6 Steel vertical ladder............................................................ 54
2.7 Hand rail........................................................................................ 55
2.8 Storm rail ..................................................................................... 55
2.9 Guard rail ..................................................................................... 55
2.10 anchor chain ............................................................................... 56
2.11 Derrick boom ............................................................................... 58
2.12 derrick boom repair................................................................ 59
2.13 Deck covering ............................................................................. 60
2.14 insulation ..................................................................................... 63
- 42 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * h/c fabrication
2.1 Hatch cover Unit: mm
ItemStandard
range
Tolerance
limits
1) Hatch cover ( single pull type )
Length ( 1 hatch ) L 5 )000,10
43(
L
Length ( 1 panel ) W 3 5
Breadth B 3 )000,10
43(
L
Height of hatch cover h 3 4
Diagonal difference ( hatch ) (L1-L2) 5 8
Diagonal difference (1 panel) (L3-L4) 4 6
Vertical deflection d1 3 4
Transverse deflection d2 3 4
Deformation of top plate d3 4 6
Height of packing gutter d4 1 2
Height of packing gutter d5 1 2
Breadth of packing gutter d6 1 2
- 43 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * H/c fabrication
ItemStandard
range
Tolerance
limits
Top plate clearance d7 3 5
Top plate difference (d8) 2 4
Side & end plate difference (d9) 2 4
Width of packing groove d10 1 2
Deviation of compression bar centering d11 32
t
Compression of packing d12 3 5
Span ( between centering ) d13 2 3
Installing height d14 2 3
Installing pitch d15 2 4
Installing pitch d16 2 4
Balancing wheel height d17 2 3
Balancing wheel distance d18 2 4
Balancing wheel pitch d19 2 4
- 44 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * H/c fabrication
ItemStandard
range
Tolerance
limits
2) Hatch cover ( side rolling type )
Length ( 1 hatch ) L 5 )000,10
43(
L
Length ( 1 panel ) W 4 5
Breadth B 5 )000,10
43(
L
Height of hatch cover h 3 4
Diagonal difference ( 1 hatch ) (L1-L2) 5 10
Diagonal difference ( 1 panel ) (L3-L4) 4 5
Vertical deflection d1 3 4
Transverse deflection d2 3 5
Deformation of top plate (d3) 3 4
Height of packing gutter D4 1 2
Height of packing gutter D5 1 2
Breadth of packing gutter D6 1 2
- 45 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * H/c fabrication
ItemStandard
range
Tolerance
limits
Top plate clearance d7 3 5
Top plate difference (d8) 2 4
Sid & end plate difference (d9) 2 4
Width of packing groove d10 1 2
Deviation of compression bar centering d11 32
t
Compression of packing d12 3 5
Span ( between centering ) d13 2 3
Installing height d14 2 3
Installing pitch d15 2 3
Installing pitch d16 2 3
- 46 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * H/c fabrication
ItemStandard
range
Tolerance
limits
3) Hatch cover ( folding type )
Length ( 1 hatch ) L 5 )000,10
43(
L
Length ( 1 panel ) W 3 5
Breadth B 3 )000,10
43(
L
Height of hatch cover h 3 4
Diagonal difference ( 1 hatch ) (L1-L2) 5 10
Diagonal difference ( 1 panel ) (L3-L4) 4 5
Vertical deflection d1 3 4
Transverse deflection d2 3 5
Deformation of top plate d3 4 6
Height of packing gutter d4 1 2
Height of packing gutter d5 1 2
Breadth of packing gutter d6 1 2
- 47 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * H/c fabrication
ItemStandard
range
Tolerance
limits
Top plate clearance d7 3 5
Top plate difference (d8) 2 4
Sid & end plate difference (d9) 2 4
Width of packing groove d10 1 2
Deviation of compression bar centering d11 32
t
Compression of packing d12 2 3
Span ( between centering ) d13 2 3
Height of wheel d14 2 3
Distance of wheel & main hinge d15 2 3
Distance of main hinge & inter hinge d16 2 3
Distance of wheel & inter hinge d17 2 3
Gap of main hinge & cylinder pin d18 3 –
Height of main hinge & cylinder pin d19 3 –
Height of main hinge d20 2 3
Height of inter hinge d21 2 3
- 48 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * H/c fabrication
ItemStandard
rangeTolerance limits
4) Hatch cover ( pontoon type )
Length ( 1 panel ) L 5 )000,10
43(
L
Breadth B 5 )000,10
43(
L
Height of hatch cover h 3 4
Diagonal difference ( 1 hatch ) (L1-L2) 5 10
Vertical deflection d1 3 4
Diagonal difference d2 3 5
Deformation of top plate d3 4 6
Height of packing gutter d4 1 2
Height of packing gutter d5 1 2
Breadth of packing gutter d6 1 2
- 49 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * H/c fabrication
ItemStandard
rangeTolerance limits
4)
Container cone level (20ft) 3 4
Container cone level (40ft)d7
3 4
Length ( container cone 20ft ) 3 5
Length ( container cone 40ft )L3
3 5
Breadth (container cone 20ft ) 2 3
Breadth (container cone 40ft )B1
2 3
Diagonal difference( 20ft ) 6 8
Diagonal difference ( 40ft )(L4-L5)
8 10
- 50 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting *h/coamingfabrication
2.2 Hatch coming
2.2.1 Typical dimension
ItemStandard
range
Tolerance
limits
Length L 5 10
Breadth B 5 10
Diagonal (L1-L2) 10 15
Straightness of top plate ( side coaming ) d1 3 5
Straightness of top plate ( end coaming ) d2 4 5
Straightness of top plate ( partially/m ) d3 2 3
Straightness of hatch coaming ( partially/m)d4 3 Not
defined
Straightness of hatch coaming ( all length )d5
)000,10
43(
L ″
Alignment of wheel & guide rail d6 – Min.0
- 51 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting *h/coaminginstallation
2.2.2 Dimension of repair ship
Item Tolerance limits
Length d1
Breadth d2
Diagonal (L1-L2)
A. H.coaming wall d1 d2 L1-L2
1) Single pull type 10 10 15
2) Side rolling type 12 12 15
3) Pontoon type 12 12 15
4) Folding type 12 12 15
B. Compression bar fitting
Item Distance Straight Level
1) Single pull type 6 7 5
2) Side rolling type 5 5 5
3) Pontoon type 5 5 5
4) Folding type 5 5 5
- 52 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * small hatch
2.3 Small hatchs
2.3.1 Height ( refer to ILLC code )
1) Position 1: H=600 mm
2) Position 2: H=450 mm
2.3.2 Dimension & Material.
1)New shipbuilding: As followed design factor.
2) General repair : As followed ship’s drawings.
3) Material: Mild steel ( Normal practice )
4) Thickness : 10mm or more ( class require )
Item Standard Tolerance
* Small steel hatch cover type ( square type )
a. Width or length d1,2
b. Difference between diagonal d3
c. Straightness/m d4
d. Bending/m d5
2
2
1
2
5
- 5
+2
3
- 53 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * Vent/ ductsystem
2.4 Air vent system
1) Height of air pipe
- Position 1: Min 900m
- Position 2: Min 760m
2) Height of others.
- Refer to design standard or existing ones.
3) Installation/type or size ( shipbuilding )
- Refer to design dwg’ with class and owner requirement representative
4) General repair, when during dry docking for I.L.L
Item Wire net (SUS 304) Remarks
Float type
Air pipe head
2 mesh x # 19 S.W.G
10 Mesh x # 31 S.W.GInsect proof screen
2 Mesh x # 19 S.W.G Rat proof screenLouver and Mushroom vent
2 Mesh x # 19 S.W.G B/fly closing device
- 54 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * ladder & rail
2.5 Steel inclined ladder
2.5.1 Installation Unit: mm
Degree ( ) Breadth Pitch
Normal 50 – 550 Min. 600 200 – 280
Tolerance ±50- -
2.5.2 Other rule & regulation
Authority ( ) Breadth Pitch
SBG 450 - 550 MIN. 600 180 – 230
NMD 450 MIN. 800 250 – 350
USCG MAX.450 MIN. 710 -
NSASN 550 – 650 400 – 700 250 – 350
DOT 600 300 – 600 -
2.5.3 Clear height
2.6 Steel vertical ladder
Breadth Pitch ( step ) Depth ( support )
Normal 300 300 150
Tolerance 400 350 180
- 55 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * ladder & rail
2.7 Hand rail Unit: mm
Item Standard Remarks
Total height Min. 1000
Clear lower height Max 230
Clear middle height Max 380
Clear upper height Max 380
Space of stanchion 1200 – 1500
Space of stavs 3600 – 4500
2.8 Storm rail
2.9 Guard rail
Gate type guard rail chain rail type guard rail
DECK DECK
- 56 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * anchor chain
2.10 Anchor chain cable
2.10.1 Cable measuring
- Measure at 3 links of each shots
- Loss limit: B.V = 13.5%
Others =12.0%
2.10.2 Stud repair of common link
1) Loose stud: welding ( one side only )
2) Missing stud: fabrication & welding
- Grade U1: SF45 or similar
- Grade U2: SF 45 or similar
- Grade U3: SF 65 – 70 or similar
(T.S: 690 N/mm2)
2.10.3 Shot marking
1) Paint: Kenter shackle : red color
: Common links : white color
2) The cotton canvas shall be secured by wire ( sus or copper )
- Detail of cotton canvas
* D: Cable normal diameter
- 57 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * anchor chainsmarking
- 58 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * derrick boom
2.11 Derrick boom construction
Item Standard Tolerance
limits
a. Length d1
b. Bending d2
c. Diameter d3
d. Roundness for piece fitting ( At boom seat ) DL- DS
*Boom & piece fitting d
7
5
0 - 0.01d
10
10
10
10
0 + 0.01d
20
20
l
- 59 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * derrick boom
2.12 Derrick boom repair
2.12.1 Boom insert repair
- Material: Same as original DWG
- Bevel: 45 – 500
- Root gap: 4 – 5mm
- Backing: Steel or pipe
(Min’ : 5.0t)
2.12.2Boom reinforcement by double plate
- Material : Same as Dwg’
- Thickness: 10t
2.12.3 Test, after repair ( welding )
1) Butt joint: visual & N.D.T ( P. T or U. T )
2) Fillet joint: Visual inspection.
2.12.4 Test confirmation of load applied.
- Load test: Proof load test with steel weight.
* Following I.L.O guidance
- 60 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * inaccommodation
2.13 Deck covering
2.13.1 A- 60 deck covering ( Floating floor type )
7 Finishing materialVinyl sheet or
carpet
6 Top coat Latex + powder1mm or
0.5mm
5 Middle coat Latex + powder 14mm
4 Base coat Latex + powder 3mm
3 Expanded metal SS41 (galv’d) 2.3t
2 Mineral wool 40t d=200kg/m3
1 Silica bond silica 2mm
No Description Material Size Q’ty Remarks
STEEL DECK
- 61 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * inaccommodation
2.13.2 A-60 deck covering ( Silicate board type )
7 Finishing materialVinyl sheet or
carper
6 Top coat Latex + powder
5 Middle coat Latex + powder 10mm
4 Metal lath SS41 (galv’d) #22
3 Base coat Latex + powder
2 Silicate board 25mm
1 Silica bond silica 2mm
No Description Material Size Q’ty Remarks
STEEL DECK
- 62 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * inaccommodation
2.13.3 Gutter way ( for galley )
(1) SUS type (SUS-304) (2) Tile type.
2.13.4 Finishing material.
(1) Vinyl tile
(2) Vinyl sheet
(3) Carpet
(4) Rubber mat
1) Perforated ( ring ) type: Outside floor
2) Groove type : inside floor
(5) Tile
1) Non slip quarry tile
2) Mosaic tile
3) Ceramic tile
4) Corner tile
2.13.5 Wooden deck
(1) Oregon pine
(2) Apiton
3) Red pine
(4) Cedar
(5) Teak
- 63 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * inaccommodation
2.14 Insulation ( Typical only )
2.14.1 Deck insulation ( A-60)
2.14.2 Bulkhead insulation ( A-60 )
Vertical section Horizontal section
- 64 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * inaccommodation
2.14.3 Det. Of insulation bottom
Not sweat
gutter way
area
Note: finishing material is glass cloth where not covered with lining
material
Sweat gutter
way area
Note: 1. The A-60 class insulation should be wrapped 380mm to
adjacent deck head and steel bulkhead.
2. Finish material is glass sloth where not covered with lining
material.
- 65 -
HALONG SHIPBUILDING Co.
Section 2 Hull outfitting * inaccommodation
2.14.4 Pipe insulation method
(Typical of prov’ refr’ system )
Sketch
Mark Name Material Remark
Pipe Copper
Insulation mould Poly ethylene with al-foiled fiber glass cloth
Cable tie Nylon P=300(ABT)Material
TypeAl-foiled fiber glass cloth
tape.
0.32mmx8
100
Application of insulation
Type of insulationThickness of piping
insulationPiping
systemLocation
Pipe Flange Nom. Dia.Thickness
of insul.
Remark
Refrigerant
(R-22)
pipe
(return gas
pipe oily)
Provision ref.
system All size 25mm
- 66 -
HALONG SHIPBUILDING Co.
Section 3 Machinery & outfittings
3.1 Main engine & shaft line ................................................................ 67
3.2 Rudder arrangement ....................................................................... 69
3.3 steering gear ........................................................................................ 70
3.4 Pintle / bush ............................................................................................ 71
3.5 Rudder repair( structure ) ............................................................ 73
3.6 Rudder repair( jumping ) .................................................................. 73
3.7 Rudder repair ( pintle locking ).................................................. 73
3.8 Rudder repair ( Gudgeon )............................................................... 74
3.9 Rudder repair ( alignment ).......................................................... 75
3.10 Propeller ( iso r4841).......................................................................... 76
3.11 Blade damage repair........................................................................ 79
3.12 Tip preparation for welding........................................................ 80
3.13 Propeller welding............................................................................. 81
3.14 Stern tube............................................................................................... 82
3.15 Tail shaft sleeve limit .................................................................... 82
3.16 Shaft cone ( taper ) part................................................................. 82
3.17 Coupling alignment.......................................................................... 83
3.18 Line shaft alignment ....................................................................... 83
3.19 Aux’ machinery.................................................................................... 84
3.20 D/G engine ................................................................................................ 86
3.21 traveling deck crane ..................................................................... 87
3.22 boiler tube deformation............................................................... 88
3.23 Boiler tube repair.............................................................................. 89
3.24 boiler tube repair.............................................................................. 89
3.25 boiler drum fab’ & welding ......................................................... 90
3.26 Boiler tube joint welding ............................................................. 94
- 67 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* Main
machinery
3.1 Main engine & Shaft line Unit: mm
Item Standard range Tolerance limits
1) Seating
Flatness of top of main engine bed
(before milling)
8 12
2) Crank shaft deflectionx
000,10
1 stroke
*Note: this range may
be changeable as per
maker’s standard
xS000,10
1
* Note: this
range is repair
ship practice
3) Installation
(1) Contact, ratio
- Main engine chock liner
- Bearing chock liner
(2) Clearance between liner and base
70%
60%
0.04
60%
50%
Not defined
25-35 Min 12
160C
(3) Chock fast orange
1. Thickness t
2. Metal temperature
3. Curing time 130C external heat
210C 12 hour
160C 24 hour
130C 48 hour
- 68 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* Main
machinery
Unit: mm
Item Standard range Tolerance limits
4) Centering ( New shipbuilding )
(1) Diameter of piano wire: d
(2) Tension of piano wire : t
(3) Deviation between rudder center line and
shaft center line.
- Dead weight over 100.000 ton: t1
- Dead weight below 100.000 ton : t2
5) Centering ( Repair ship )
(1) Diameter of piano wire : d
(2) Tension of piano wire : t
(3) Deviation between rudder center line and
shaft center line.
d=0.7
t=50kg
t1 5
t2 4
d=0.5-0.7
t=50kg
d=0.7 0.1
t=50 5kg
t1 8
t2 6
0.1
10kg
t1 10
t2 8
- 69 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* rudder
3.2 Rudder arrangement Unit: mm
Item Standard range Tolerance limits
1) Installation
(1) Contact ratio
(2) Clearance between carrier and liner
60%
0.04
>50%
<0.05
2) Centering
Deviation between center line of rudder carrier and
pintle.
3) Centering of repair ship for checking only
d<0.3
d<1.0
d 0.5
d<1.5
- 70 -
HALONG SHIPBUILDING Co.
Section 2Machinery
& outfittings* Steering gear
3.3 Steering gear arrangement Unit: mm
Item Standard range Tolerance limits
1) Installation
(1) Ram cylinder type
- Contact ratio
- Clearance between liner and base
(2) Rotary vane type
- Contact ratio
- Clearance between liner and base
<0.06
60%
Not defined
Not defined
2) Alignment
3) Alignment for general repair
(d1) 1
(H1-H2) 0.08
d1 1.5
H1-H2 0.2
(d1) 2
(H1-H2) 0.15
d1 2.0
H1-H2 0.5
- 71 -
HALONG SHIPBUILDING Co.
Section 2Machinery
& outfittings* Rudder
pintle/ bush
3.4 Pintle/ Bush
Item Standard range Tolerance limits
1) Contact ratio of cone part
2) Pintle clearance
3) Material: sleeve
4) Thickness ( bush/ sleeve)
Unit: mm
Dia <100 100-
150
150-
200
200-
300
>300
Sleeve 7.5 9 10 12 15
Bush 10 12 15 20 25
* NK:
- Thickness of pintle sleeve
- Thickness of pintle bush
- dp<300
- dp>300
- Thickness of stock sleeve
- Thickness of neck bush
- dp<300
- dp.300
5) Non-Metallic bush material (HMD)
* Brand: HFG-LITE CR 510
* Max’ surface pressure: 56kg/cm2
* Class authority: KR, NK, BV, LR, DNV, GL,
ABS
60%
Builder’s practice
bc/sus, bc/resin
0.03dp+5
0.05dp+5
0.05dp+11
0.03dp+3
0.05dp+2
0.03dp+8
50%
Metal:
0.8~2.0mm
Non metal:
1.5~2.5mm
Metal:
- Sleeve: 6.0
- Bush: 8.0
Non metal
- Bush:10.0
- 72 -
HALONG SHIPBUILDING Co.
Section 2Machinery
& outfittings* Rudder
pintle/ bush
3.4.2 Rudder bearing clearance recommended values
● A.B.S guidance
Approximately 1% of the pintle diameter to a maximum 6.3mm
Other: R/100x3.0 or 0.4 mm/inch
● N.K guidance
The limit of wear down of the pintle bush is 5 to 6mm the bearing clearance in diameter, and the neck
bearing is 3 to 4mm abnormal wear-down.
● B.V guidance
* Pintle diameter 50 to 100 = 5mm
* Pintle diameter 100 over = d/100+4
● Yard guidance
* D/100+2= Upper pintle clearance
* D/100+3= Lower pintle clearance
● D.N.V guidance
I = Renewal necessary
II = Renewal recommended
III= New/ repaired
● L.R guidance- Recommend: 4.0+0.002 pintle diameter- Renewal: 5.0+0.02 pintle diameter● K.R guidance- 0.01 Dia’+4mm of pintle- 0.01 Dia’+2mm of neck
- 73 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* rudder
repair
3.5 Structure welding
Dimensions ( m)Plate thickness
(mm) a b
Kind of fillet
weld
Up to 6 65 35
7~18 75 40
19 85 45
F1
Slot welding
Aft end construction of rudder
3.6 Jumping stopper Unit: mm
Item Standard range Tolerance
The clearance between jumping stopper and
rudder carrier
C 2.0 2.0
3.7 Pintle locking
Locking device for pintle nut Locking ring or bar
- 74 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* rudder
repair
3.8 Center of gudgeon
Tolerance
1.50mm
- Carrier
- Upper
- Lower
3.8.1 Gudgeon repair ( case 1)
1) Build –up by welding
2) Re- boring
3) Re- alignment check
smaw
Machine practice
Piano wire
3.8.2 Gudgeon repair ( case 2)
1) Boring to oversize
2) Fabricated steel liner
3) Inserted the steel liner
Machine practice
Forged steel
interference
0.005~0.01
T: Min 6.0mm
W: 0.35xL
- 75 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* rudder
repair
3.9 Rudder alignment
Item Standard range Tolerance limits
Deviation of height(H) 0.5 1.5
Deviation of center line 0.5 1.5
3.9.1 Adjustment
1) Machine-up the palmMin thickness
0.03 x stock dia
2) Contact ratio0.04mm
(70%)(50%)
3) Distance of bolt hole and flange edge DE: 0.75xF.T
- 76 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* propeller
3.10 Ship Scrw propeller
* Refer to ISO 484/1 or 484/2 Ship building manufacture tolerance 1981(E)
3.10.1 Classification
Choice of the class should be made by the user: the indications in table 1 below afferent guidance
for this choice.
Class Accuracy of manufacturing Normal use
S High precisionScrew propeller of superior quality for
special purposes
I and II Medium precision For majority of merchant vessels
III Large tolerances For vessels without special characteristics
Note-class III: Applies in general only to cast iron screw propellers.
3.10.2 Tolerance of pitch
ClassDescription
S I II III
1.5% 2% 3%Local pitch with a minimum of
15mm 20mm 30mm
1% 1.5% 2% 5%Mean pitch per blade at any radius With
a minimum of 10mm 15mm 20mm 50mm
0.75% 1% 1.5% 4%Mean pitch per blade with a minimum of
7.5mm 10mm 15mm 40mm
0.625% 0.75% 1% 3%Total pitch with a minimum of
6mm 7.5mm 10mm 30mm
Note:
1. For screw propeller with constant as well as for screw propellers with variable pitch, the pitch of
screw propellers according to classes S. I and II should be measured at least on 5 radius ( e.g
0.3R; 0.5R; 0.8R; 0.95R and for class II on 3 radius ( e.g 0.5R; 0.7R; 0.9R ). As far as possible
the measurements should be taken on at least 3 point on each radius.
- 77 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* propeller
3.10.3 Surface finish
The surface texture of the blades, expressed as an arithmetic mean deviation, R 2 , in
micrometers, in accordance with ISO/R 468, shall have a roughness not greater than:
- 3 from the hub for propellers of class S;
- 6 from the radius 0.3 R for propellers of class I;
- 12 from the radius 0.4R for propellers of class II;
- 25 from the radius 0.5R for the propellers of class III;
The smoothness of the surface of the propeller blades should be determined by the mean height.
Hm of the surface roughness of the blades at least for the radius of the screw propeller over
0.3R.
)...21(1
HnHHn
Hm
- 78 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* propeller
3.10.4 Static balancing
Unit: mm
Item Standard range Tolerance limits
Deviation of blade ( maximum ) 150 Refer calculation
* Max’ permissible unbalancing mass.
( According to ISO R481/1 1981)
2Rn
mCp or Km, whichever is the smaller.
P =............................ Km= x m= kg
p = kg
Where :
m: propeller weight in (kg)
R: propeller radius in meter (m)
n: propeller r.p.m
C&K: factors of class given.
S I II III
C 15 25 40 75
K 0.0005 0.001 0.001 0.001
* Actual unbalancing mass at the blade deviation
m: 0.269 269.0.
.
SinR
HM
= kg
Where
M: test ( attached) weight in kg
H: length of deviation ( Hmax-H min)
R: propeller radius in meter
Sin : angle of propeller blade (sin 900 : 1.0, 720 : 0.95, 600 : 0.87)
- 79 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* propeller
repair
3.11 Damage repair areas
3.11.1 Yard’s practice
R= propeller radius
C1= chord length at radius
Repair jones of bladeSection
Kind of repair A B C D
Propeller
boss
Damage & cavitation part
build up weldingx O O O -
Crack part welding x O O O O
Partly renew x O O O -
Straightening O O O O -
Cold straightening x O O O -
Grind out x x x O -
3.11.2 Classification practice
* Refer to class permissible rectification range
- 80 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* propeller
repair
3.12 Blade tip repair preparation
- 81 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* propeller
repair
3.13 Propeller welding
3.13.1 Welding process ( refer to W.P.S)
1) minor repair: in use GTAW
2) Major repair: in use GTAW + GMAW
3.13.2 Temperature control
1) Pre heating: propane torch
2) Stress relief: induction PAD/ COIL analysis
( Electric heating element )
3)Cooling: should be retarded by asbestos blankets.
Material Preheat’ Temp 0C Stress relief Temp 0CStraightening
Temp. 0C
Mn-bronze 150-250 350-550 500-800
NiMn- bronze 150-250 350-550 500-800
NiAl-Bronze 50-150 Kh«ng 700-900
MnAl-bronze 100-250 450-600 700-850
3.13.3 Welding material
Material U.T.P Gricu Ampco
Mn-bronze A-34 ALBZ-9 Trode 10
Ni-Al-bronze A-3444 ALBZ-26 Trode 46
Mn-Ni-Al-bronze A-34N T-8 Trode 40
AWS SPEC’ = A 5.7
CLASS = ER CU x x x x
* Refer to propeller welding procedure
- 82 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* stern tube/
shaft
3.14 Stern tube clearance
Item Standard Tolerance
Stern tube lignum vitae clearance
a. Tail shaft dia < 230mm
b. 230mm Tail shaft dia < 305mm
c. Tail shaft dia 305
Stern tube simplex Type clearance
4.5mm
6.5mm
7.5mm
- Builder’s
practical
6.0mm
8.0mm
9.5mm
400~500 0.7~0.8500~600 0.8~1.0600~700 0.9~1.2700~800 1.0~1.3800~900 1.0~1.4
Tail shaft dia. ( mm)
900~1000 1.2~1.5
2x Original
clearance
(builders
practice)
3.15 shaft sleeve thickness loss limits
N.K.G.L L.R, DNV Remarks
t= 0.03DS+7.5
T1≠3/4TT=
32
230ds
T1=0.75T
ds: Shaft dia’
T: Brg’ surface
T1: non Brg’ surface
3.16 shaft cone part
Item Standard range Tolerance limits
1) Contact ratio of propeller / shaft 90% 70%
* Smooth ground
* Decide by class / owner for
renewal
2) Shaft crack detection
* ABS repair guidance
- Max’ depth
- Max’ length ( total circ’ ) 1/4’’(6.35mm)
1/4C(0.25C)
- 83 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* shaft
alignment
3.17 Coupling alignment Unit:
mm
ItemStandard
range
Tolerance
limits
1) Simplex ( oil – bath ) type - gap
– Sag
Builder’s
practice 0.20
0.30
2) Lignum vitae ( water lub’ ) type
- Gap
- Sag
a. Gap = (g1-g2)
b. Sag = (s1-s2)
Builder’s
practice 0.30
0.70
3.18 Line shaft alignment
1) Reaction load on the bearing surface Builder’s
practice
- 84 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* Aux’
machinery
3.19Aux’ machinery Unit: mm
Item Standard range Tolerance limits
1) Classification of auxiliary and deck machinery
(1) Grade “A”
Windlass
Diesel generator
(2) Grade “B”
Turbo generator
Mooring winch & turbine
Cargo winch
(3) Grade “C”
Other machineries which are not listed in Grade “A”
and “B”
2) Installation
(1) Clearance between liner and base
Grade “A”
Grade “B”
Grade “C”
(2) Liner contact ratio
Grade “A”
Grade “B”
Grade “C”
(3) Chock fast orange thickness
0.04
0.08
Not defined
60%
50%
Not defined
25-35t
* Other maker
0.05
0.1
Not defined
60%
50%
Not defined
Min’ 12t
guidance
- 85 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* Aux’
machinery
ItemStandard
range
Tolerance
limits
3) Alignment ( solid type ) Grade “B” only
4) Alignment of deck machinery
- Solid type
- Shaft type
S 0.05
G 0.07
Gap/sag 0.15
Gap/sag 0.18
Not defined
Not defined
5) Alignment of pumps ( flexible coupling type )
- Shaft dia’ <50mm
- 50 Shaft dia’<100mm
- Shaft dia’>100mm
Gap/sag
0.15
0.20
0.25
cbGap
baSag
2
- 86 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* D/G engine
3.20 Diesel generator Unit: mm
Item Standard range Tolerance limits
Cold
condition 000,10
1 x stroke
000,10
2 x stroke
1) Crank shaft deflection
- New installation
Hot
condition 000,10
2 x stroke
000,10
3 x stroke
- General repair ship
Cold
condition 000,10
2 x stroke
- 87 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* deck crane
3.21 Traveling deck crane
Item Standard rangeTolerance
limits
(1)Installation of rail
- Distance between center of rails ( common type )
- Distance between center of rails ( Gantry type )
- Straightness of rail ( transverse, vertical direction )
- Difference of height between port and stb’d
d1 5
d2 10
d3 5
(per 10m)
d4 8
To be measured
at each 5m
Not defined
Not defined
Not defined
Not defined
- 88 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings*boiler tube
damage
Item Standard Tolerance
* Boilers
3.22 Boiler tube deformation
1. Water tube
* d = tube dia.
2. Smoke tube
* d = tube dia
d 0.5d
d 0.3d
Not defined
Not defined
- 89 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* boiler tube
repair
Item Standard Tolerance
3.23. Edge preparation of the pipe or
tube and cutting of the window patch
method
3.24 Procedure for effecting a
permanent repair mono wall tubes.
( with wedge in place )
A=50 50C
B=1.5 1mm
A=1.5 1mm
B=50 50C
C=2 1
A=50 100
B= 212
A= 25.1
B=50 100
C=2 2
- 90 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* boiler repair
3.25 Boiler repair procedure
1. Applicable to aux boiler drum repair ( partly )
2.Pressure range: 7.0~12.0kg/cm2
3. Material grade: for pressure vessel jis SB410 or similar
4. Working sequence
1) Material confirmation
- Same as original maker or similar
- Confirmation of the material mill sheet
* Class certificate
* Chemical composition
* Mechanical property
2) Fabrication of the drum shell
* To be rolled to circumference( mm in diameter )
3) Preparation
1) To be made edge shape the end of plate by grinder and machining.
2) Refer to attached joint details.
3) Permissible misalignment at the butt joint
- Longitudinal: 1/4t or max’ 3.0mm
- Circumferential: 1/4t or max’ 4.0 mm
- 91 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* boiler repair
5. Welding
1) Welding is to be performed by approved welders.
2) Preheating : temp: 100-1500C
Method: Propane torch.
5-1) Electrodes
1) Manual: S7016-LF (produces by HWMCO )
LB-52 (produce by kobe steel )
2) TIG : TGS-50 (produce by kobe steel )
3) MIG: MGS-50 (produce by kobe steel)
5-2) Size of rods
1) Manual: (3.2-5.0 )
2) TIG & MIG: (1.2-1.6 )
5-3) Post weld heating ( if necessary )
1) Temperature: 6250C 250C (According to Class rules )
2) Holding time : One ( 1 ) Hour/25 t
* To be smooth ground to unbeaded weld metal and spatters.
6. Test and inspection
1) Fit –up and Edge – preparation ( Class, Q.C, owner )
2) Visual inspection after grinding ( Class, Q.C, owner)
3) N.D.T.
3-1) Radiograph test (100%): Drum shell butt & seam joints.
3-2) M.P.I or DYE – check (100%)
: Fillet and other joints.
4) Hydro static test: test pressure: D.Px1.5 time
5) Final dimension check if necessary.
- 92 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* boiler repair
Typical joint detail
- 93 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* boiler repair
6.Burner Plate
7. Flue Pipe
- 94 -
HALONG SHIPBUILDING Co.
Section 3Machinery
& outfittings* boiler tube
joint
3.26 Typical joint of boiler tube within tube nests
1) Plan tube seal welding
2) Stay tube welding
3) Flange connection
- 95 -
HALONG SHIPBUILDING Co.
section 4 piping system
4.1 general .................................................................................................... 96
4.2 Fabrication............................................................................................ 99
4.3 installation.......................................................................................... 104
4.4 ship side line repair........................................................................... 106
4.5 Scupper pipe ........................................................................................... 107
4.6 Hull piping in accommodation .................................................... 110
4.7 P.V.C piping in accommodation .................................................... 113
4.8 Pipe support in accommodation ................................................. 114
4.9 hyd-line grade.................................................................................... 115
4.10 piping joints............................................................................................ 116
- 96 -
HALONG SHIPBUILDING Co.
section 4 piping system * piping grade
4.1 General
1. Grade of pipe
The grade specified by each classification society shall be divided as follows
(1) LR
Class 1 Class 2 Class 3Grade
Service Press. Temp. Press. Temp. Press. Temp.
Steam P>16.3 or T>300 7.1<P 16.3 or 170<T 300 P 7.1 T 170
Fuel oil P>16.3 or T>150 7.1<P 16.3 or 60<T 150 P 7.1 T 160
Other media P>40.8 or T>300 16.3<P 40.8 or 200<T 300 P 16.3 T 200
(2) ABS
Class 1 Class 2Grade
Service Press. Temp. Press. Temp.
Vapor and gas P<10.5 or >343 P 10.5 T 343
Water P<15.8 or T>177 P 15.8 T 177
Lubricating oil P<15.8 or T>204 P 15.8 T 204
Fuel oil P<10.5 or T>66 P 10.5 T 66
Hydraulic fluid P<15.8 or T>204 P 15.8 T 204
Lethal gas & liquids All - -
(3) KR & NK
Class 1 Class 2 Class 3Grade
Service Press. Temp. Press. Temp. Press. Temp.
Steam P>16 or T>300 7<P 16 170<T 300 P 7 T 170
Fuel oil P>16 or T>150 7<P 16 60<T 150 P 7 T 60
Water, lub. oil,
comp. air, Hyd.
oil
P>40 or T>300
(Only KR)16<P 40
200<T 300
(Only KR)P 16
T 200
(Only KR)
Primary
Refrigerant
( ammonia )
All All - - - -
Primary
refrigerant
(R12,R22)
- - - - All All
- 97 -
HALONG SHIPBUILDING Co.
section 4 piping system * piping grade
(4) U.S.C.G.
Service Class Pressure ( psig ) Temp (0F)
I Any and 0 and above
I-L Any and <0
II (3) (3) (3)
Class B&C
poisons
II-L (3) (3) (3)
I >150 or > 650
I-L >150 and < 0
II 150 and 0 to 650
Gases and
vapors
II-L 150 and <0
I >150 and 0
I-L >150 and <0
II 150 and 0
Liquefied
flammable
GassesII-L 150 and <0
I >225 or >330Molten sulphur
II 225 and 330
I >225 or >150
I-L >225 and <0
II 225 and 0 to 50
Cargo liquids
Grades A
Through DII-L 225 and <0
I >225 or >400
I-L >225 and <0
II 225 and 0 to 400
Cargo liquids
Grade E
II-L 225 and <0
I >225 or >350Water
II 225 and 350
I >150 or >150Fuel ( bunker
diesel, gasoline,
etc...)II 150 and 150
I >225 or >400Lubricating oil
II 225 and 400
I >225 or >400Asphalt
II 225 and 400
- 98 -
HALONG SHIPBUILDING Co.
section 4 piping system * piping grade
I >225 or >400Heat transfer
oil II 225 And 400
I >225 Or >400Hydraulic fluid
II 225 And 400
Flammable or combustible dangerous cargoes ..... Refer to specific requirements of Part 40
of this chapter.
Other dangerous cargoes .... Refer to specific requirement of part 98 of this chapter.
1. Where doubt exists as to proper classification, refer to the Commandant for resolution.
2. For definitions, see 46 C. F. R Part 30, 151. Note that the category “B” and “C” poison is
not used in the rules applying to self Propelled vessels ( 46 CFR Part 153 ).
3. Not permitted except inside cargo tanks approved for Class B and C poison.
( 5 ) D. N. V
Class I Class II Class IIIPiping
system p/bar t0C p/bar t0C p/bar t0C
Steam, Fuel
oil, Other
media
>16
>16
>40
Or >300
Or >150
Or >300
16
16
40
300
150
300
7
7
16
170
60
200
p: Design pressure, as defined in Sec. 6 A303
t: Design temperature, as defined in Sec.6 A303
1) For Class II and III piping both specified conditions are to be met, for Class I piping one
condition only is sufficient.
2) Air, Water, lubricating oil and hydraulic oil.
3) Cargo oil and open ended pipes ( drains, overflows, vents, boiler escape pipes, ... etc )
independently of the pressure and temperature, are pertaining to class III.
4) Thermal oil pipes independently of temperature and pressure are pertaining to class I.
5) Hyd’ oil piping in engine room with design pressure above 40bar are pertaining to class II.
- 99 -
HALONG SHIPBUILDING Co.
section 4 piping system * Fabrication
4.2 Pipe fabrication Unit: mm
Item Standard range Tolerance limits
1)Dimension
(1) Straight pipe
(2) Bending pipe
(Two dimensional bending )
(Three dimensional bending )
(3) Branch pipe
(4) Penetration piece
d= 4
d= 5
d 010221
d= 5
d 01
d= 4
d 01
d= 4
d 01
Not defined
Not defined
Not defined
Not defined
Not defined
- 100 -
HALONG SHIPBUILDING Co.
section 4 piping system * Fabrication
Unit: mm
Item Standard range Tolerance limits
2) Attachment of flange to pipe
(1) Angle of flange to pipe
(2) Distortion of flange face
D: out dia. Of pipe
(3) Distance between fillet and butt welding bead
(4) Distance between face to flange and welding toe
a 2
D>200
a 0.5
200 D≤450
a 1
D>450
a 1.5
L 5
a: max. 1.5
Not defined
<1
<2
<2.5
Not defined
Not defined
- 101 -
HALONG SHIPBUILDING Co.
section 4 piping system * Fabrication
Unit: mm
ItemStandard
range
Tolerance
limits
Bending radiusBending
method
Pipe
materialDivision
3D R 4D 4D R
E(%) ≤10 ≤10
T(%) ≤20 ≤15Steek
pipeH H D
100
1
E(%) ≤10 ≤10
T(%) ≤25 ≤20Copper
pipeH H D
100
1
E(%) ≤10 ≤10
T(%) ≤20 ≤15
Cold or
hot
bending
Al-Br &
kunifer
pipe H H D100
1
3) Pipe bending
(1) Elliptically (E)
%100xD
DsDlE
D: Out dia of pipe
R: Bending radius
(2) Thickness reduction ratio ( T)
%100xt
trtT
t: Original pipe thickness
tr: Thickness after bending
D: Out dia. of pipe
(3) Wrinkle & swelling
H: Height
D: Out of pipe
- 102 -
HALONG SHIPBUILDING Co.
section 4 piping system * Fabrication
Unit: mm
Item Standard range Tolerance limits
4) Sleeve joint
(1) Steel
(2) Copper , Al-Br
a: Min.1.5
l1:
Min.10(D≥65A)
Min.20(D≤80A)
(But max.1 only
for U.S.C.G)
0.05 a 0.15
Not defined
″
″
Not defined
5) Socket joint
a 1.0
b 0.2
a 1.5
b 0.8
- 103 -
HALONG SHIPBUILDING Co.
section 4 piping system * Fabrication
Unit: mm
Item Standard range Tolerance limits
6) Welding of steel pipe
( 1 ) Edge Preparation
( 2 ) Back bead
( Class I, II pipe ) ( Other pipe )
( 3 ) Under cut
d 1.6
a = 2.4 ± 0.8
140
0 d1 2
d2 0.5
d 0.3
Not defined
Not defined
d 0.8
- 104 -
HALONG SHIPBUILDING Co.
section 4 piping system * Installation
4.3. installation Unit: mm
Item Standard range Tolerance limits
1) Pipe hole cutting & penetration
( 1) Hole cutting
( 2 ) Pipe penetration
A-Type
D- type
100
Dd
l = 0.1D
But min.50
T T1
10 ~ 100A
b = 30 ± 5
125 ~ 500A
b = 40 ± 5
550 ~ 700A
b = 50 ± 5
D1 = D + Max.15
65A & below
L = 100
80a & above
L = 150
100
Dd
Not defined
Not defined
“
“
“
“
“
Not defined
“
- 105 -
HALONG SHIPBUILDING Co.
section 4 piping system * Installation
Unit: mm
Item Standard range Tolerance limits
2) Alignment a 2
c – b 2
Not defined
3) Bolting
( U bolt ) ( Flange bolt )
a = 0 ~ 3
a2 + a3 = 0 ~ 3
b1 = 0 ~ 5
threads
b2 = 0 ~3
threads
H/coil only
a = 1 ~ 3
a1 = 0 ~3
a + a1 3
Not defined
4) Air vent pipe H = 10 Not defined
5) Sounding pipe H = 20 ± 5
t = 15
Not defined
6) Dresser coupling Short type
l = 40
d1 = ± 5
d2 3
Long type
l = 70
d1 = ± 30
d2 6
Not defined
d2 5
Not defined
- 106 -
HALONG SHIPBUILDING Co.
section 4 piping system * Installation
4.4 Ship side line repair Unit: mm
Item Standard range Tolerance limits
7) Suction mouth ( hull part )
( 1 ) A – Type
( 2 ) B – Type
Pipe dia. (D) G
80A & below 20
100A<D<150A 25
200A 35
Pipe dia. (D) G
150A 40
200A 45
250A 55
300A 65
350A 65
400A 75
450A 85
500A 100
550A 110
600A 120
650A 140
Main suction
H = ± 10
Stripping
H = ± 5
Main suction
H = ± 10
Stripping
( Including
main &
stripping )
H = ± 5
- 107 -
HALONG SHIPBUILDING Co.
section 4 piping system * Installation
4.5 Scupper pipe
ItemTolerance
LimitsRemarks
For ship side
Distance
Piece
C 3
L 15
D 500 ± 10
For boiler
Blow down
Distance
Piece
C 3
L 15
D 500 ± 10
For ship side
Distance piece
C 3
L 15
D 500 ± 10
For pad flangeL1 15
L2 15
For Echo
sound, Pad
flange
C 3
D 450 ± 5
- 108 -
HALONG SHIPBUILDING Co.
section 4 piping system * Installation
BO
ILE
RB
LO
WD
OW
N( SovietR
ussiaShipyard, butrequiredclasssurveyorow
ner )
Sea c
hest o
n
the sea
side
Bo
iler b
low
do
wn
or
gen
era
l
ad
aptin
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Gen
era
l
ad
aptin
g
Style
No
rm
al pipe
C¨
n b
Ö/ ®Öm
®ì
1)C
¨n
: 20t
2) §Öm
: Dµy b»ng hoÆc
h¬n chiÒu dµy èng
300
200
150
125
100
80 65 50 32
25A
17.4
12.7
11.0
9.0
8.6
7.6
7.5
7.0
t(min)
Pressu
re
Standard10K>
SCH
’80
Rem
ark
thic
kn
ess
1.flan
ge:
1) Existing using
2)Sam
e size use with valve
2.Ma
teria
l
Note :
1.The carbon content of the
material shall be
0.23% or less.
2.The m
aterial of S20C
shall be
heat treated.
pad
flan
ge
pipe
co
mpo
nen
t
SM41, SF45
or S20C
STPG
38ST
PT38
ma
teria
l
rem
ar
k
- 109 -
HALONG SHIPBUILDING Co.
Section 4 piping system * Scupper piping
1) Deck penetration
2) Ship side discharge penetration the hull
3) PCLE deck or weather deck installation
- 110 -
HALONG SHIPBUILDING Co.
Section 4 piping system * hull piping
4.6 Hull piping in accommodation
4.6.1 Detail of welding method
1) Butt weld
No. Methods Dimension Application
t 3.2
t=t1
S=2 1
10201 S=2 1
0202 B=1.6 0.8
t >3.2
Pipe to pipe
0
0
5
0
0301
t=t1
S=2 1
t >3.2
20101 S=2 1
0
0
5
0
0302
B=1.6 0.8
t = t1
t >3.2
Pipe to fitting ( Elbow,
reducer, tee )
3
t < t1 S = 2 1
a 1.6 B =1.6 0.8
: Refer to 1 or 2
Specified above.
t >3.2
a>1.6
: Refer to 1 or 2
Specified above
t >3.2
Pipe to pipe or
Pipe to fitting
- 111 -
HALONG SHIPBUILDING Co.
Section 4 piping system * hull piping
4.6.2 Weld profiles and tolerance limit for piping
( 1 ) Jointing and welding shall be carried out to have satisfactory weld profiles.
( 2 ) Tolerance limits and repair procedures are as follows.
Item MethodsTolerance
LimitRepair procedure
Under cutD 0.8 mm
When the depth of under
cut exceeds the limitation,
to be repaired by welding
with small dia, electrodes.
All pipes
10
When the tolerance
exceeds the limitation,
flange to be refitted.
Alignment D: Pipe N/D
D<200:
a 0.1mm
200 D 450:
a 2.0mm
D>450:
a 2.5mm
When the tolerance
exceeds the limitation,
flange to be renewed.
Dimension L 5mm
- 112 -
HALONG SHIPBUILDING Co.
Section 4 piping system * hull piping
4.6.3 Filet weld
( 1 ) Pipe to flange
W: 1.5t but not less than 5mm.
C: Maximum 2mm ( not to be tight fit ), but sum of the clearances diametrically
opposite is to exceed 5mm.*t1 : but need not to exceed 0.3T
( 2 ) Pipe to sleeve
W : Refer to page 52/86.
C : See “ C “ value of pipe to flange weld.
* Mark part to be at least 9.5mm
( 3 ) Welding to structure ( for pipe penetration piece ).
- 113 -
HALONG SHIPBUILDING Co.
Section 4 piping system * hull piping
4.7 PVC A/B class penetration piece type in accommodation
* Application : A/B – class steel deck/ bulkhead penetration for PVC pipe.
Pipe Steel sleeve
N.D O.D D d t N.DH L e
50 60 89.1 78.1 5.5 50 60 89.1 78.1
65 76 114.3 102.3 6.0 65 76 114.3 102.3
75 89 139.8 126.6 6.6 75 89 139.8 126.6
100 114 165.2 151.0 7.1 100 114 165.2 151.0
Note : 1) “ PANDA-90” fire sleeve transit device for the penetration of A or B class division for
PVC pipe.
2) Noncombustible material certificate of PANDA -90 fire sleeve.
LR: SVG/F91/355
DNV: F-11314
ABS: 91-BK-27245-X
KR: BU-02901/03
BV: 5031/5042/A1/0
GL: 67951 HH
3 ) *** Mark : PANDA-90 length 180mm, steel sleeve 200mm.
- 114 -
HALONG SHIPBUILDING Co.
Section 4 piping system * hull piping
4.8 Pipe support for steel and PVC pipe in accommodation
1) Standard distance of steel and PVC pipe
( 1 ) Distance ( interval ) of pipe supports to be based on the flowing table, but may be
increased up to the maximum 1.2 times of the standard distance in consideration of hull structure.
Steel pipe PVC pipe
Nom. dia
(A)
Out dia.
(mm)
Distance
(m)
Nom. dia.
(A)
Out dia.
(mm)
Distance
(m)
Remark
15 21.7 1.0
20 27.2 1.5
25 34.0 1.5
32 42.7 1.5
40 48.7 2.5 40 48 1.0
50 60.5 2.5 50 60 1.0
65 76.3 2.5 65 76 1.2
80 89.1 3.2 75 89 1.2
100 114.3 3.2 100 114 1.5
125 139.8 3.2 125 140 1.5
150 165.2 3.9
L=1.2S
(L: Maximum
allowable
distance of pipe
supports.
S: Standard
distance of pipe
supports )
Note: Theoretical criteria is guided by a limitation of about 3mm deflection with piping filled
fully between pipe supports one another.
( 2 ) Stays for pipe supports to be fitted on or close to stiffening beam as far as possible.
( 3 ) Stays for pipe supports to be sniffed to avoid sharp ends and to be paint finished.
- 115 -
HALONG SHIPBUILDING Co.
Section 4 piping system * Hyd-line design
4.9 Pipe grade of hyd-line
Symbol Grade/ name Range of applicable Remark
JIS G 3452 SGPLOW PRESS SYSTEM
* Pump suction pipe
JIS G 3454 STPG
MIDDLE PRESS SYSTEM
HIGH PRESS SYSTEM
* SEAM LESS PIPE
- W.P≤100kg/cm2
- W.T≤3500
JIS G 3455 STSHIGH PRESS SYSTEM
* SEAM LESS PIPE- W.P≥100kg/cm2
JIS G 3459SUS ( stainless )
(304, 306 TP)
HIGH PRESS SYSTEM
CORROSION
RESISTANCE
HIGH TEMPERATURE
SERVICE SYSTEM
SPECIAL REQUEST
ONLY BY OWNER
- 116 -
HALONG SHIPBUILDING Co.
Section 4 piping system * Hyd-line design
4.10 PIPING JOINTS
KIND OF JOINTS MATERIALPIPE DIA.
(mm)
WORK PRESS
(kg/cm2)
MATERIAL
RANGE
Socket welding and
threaded fitting
SF45
S25C
SUS
6A~100A Max.500* STEEL OR
SUS PIPE
Sliver brazing fitting
BsTF4
BsBF
CNTF1
6A~50A Max.210*AL- BRASS
* Cu –Ni PIPE
Square flange SF45 15A~80A Max.210 * STEEL PIPE
S25C
SUSMax.210
* STEEL OR
SUS PIPETween ferrule
compression fittingBrass
6A~25A
Max.20* COPPER
TUBE
S25C
SUSMax.250
*STEEL OR
SUS PIPEMulti bite type fitting
Brass
6A~25A
Max.100* COPPER
TUBE
S25C
SUSMax.210
Flared fitting
Brass
6A~25A
Max.20
* STEEL OR
SUS PIPE
* COPPER
TUBE
6A~25A Max.210
25A~40A Max.180Quick coupling
50A Max.140
* STEEL PIPE
IF
NECESSARY
- 117 -
HALONG SHIPBUILDING Co.
SECTION 5 PAINTING PART
5.1 PRIMAY SURFACE ................................................................................... 118
5.2 preparation grade…………………………………………………119
5.3 shop priming.......................................................................................... 119
5.4 D.f.t control ( new shipbuilding ) ............................................ 120
5.5 D.f.t control ( repair ship )........................................................... 120
5.6 pre- treatment.................................................................................... 121
5.7 treatment of weld part................................................................ 122
5.8 damage part ......................................................................................... 125
5.9 Management ( pre- coating ) ....................................................... 129
5.10 environmental ( temp/ humidity ) .......................................... 129
5.11 final coat condition ..................................................................... 130
- 118 -
HALONG SHIPBUILDING Co.
section 5 painting part * steel surface
5.1 PRIMARY SURFACE PREPARATION
ITEM Method Surface preparation grades
6 t Shot blasting
Sa22
1
When shot blasting is considered
impracticable, sand blasting may be
applied.
Rolled hull
structural steel
6>t Sand blastingSa2
2
1
Pipe
250 d
Sand blasting or
hand/ power tooling
pickling
Sa22
1 or St2-St3
250>d
Hand/ power tooling
pickling
( Blasting at yard’s
convenience )
St2-St3 or Sa22
1Outfitting,
pipes, supports,
seat, etc...
Support,
seats, aux.
mach. Etc.
Hand/ power tooling
( Blasting at yard’s
convenience )
St2-St3 or Sa22
1
- 119 -
HALONG SHIPBUILDING Co.
section 5 painting part * steel surface
5.2 PREPARATION GRADE
IT is assumed that prior to treatment the steel surface has been cleaned of dirt and grease and
that the heavier layers of rust have been removed by chipping.
( 1 ) Sa2 1/2 : Blast cleaning.
Very thorough blast cleaning, Mill scale, rust and foreign matter shall be removed to the
extent that only traces remaining are slight stains in the form of sports or stripes.
Finally, the surface is cleaned with a vacuum cleaner, clean dry compressed air or a
clean brush. It shall then correspond in appearance to the prints designated Sa 2 1/2.
( 2 ) St2 : Power tool cleaning
Thorough scraping and wire-brushing, machine brushing, grinding –etc. The treatment shall
remove loose mill scale, rust and foreign matter. Finally, the surface is cleaned with a vacuum cleaner,
clean dry compressed air or a clean brush. It should then have a faint metallic sheen. The appearance
shall correspond to the prints designated St2.
( 3 ) St3 : Power tool cleaning
Very thorough scraping and wire-brushing, machine brushing, grinding-etc. Surface
preparation as for st3, but much more thoroughly. After removal of dust, the surface shall have a
pronounced metallic sheen and correspond to the prints designated St3.
5.3 SHOP PRIMING
Item D. F. T Surface preparation
Shop primer
( Pre- treatment )15 5
Shop or sand blasting
Sa2 1/2
- 120 -
HALONG SHIPBUILDING Co.
section 5 painting part * D. F. t Control
5.4 Dry film thickness control ( New ship building )
Item Standard
Tanks One point/ five square metersMeasuring
pointsOutside
shellOne point/ ten square meters
1. Average dry film thickness of the paint to be attained
as the specification.
2. At least 85% of the measuring points to meet the
specified film thickness.
3. Min. 85% of the specified film thickness to be
attained on remaining 15% measuring points.
5.5 Dry film thickness control ( General repair ship )
Item Standard
Tanks One point/ Ten square metersMeasuring
pointsOur side
shellOne point / 50 square meters
D. F. T Control
1. Average dry film thickness of paint to be attained as
the specification.
2. At least 80% of the measuring points to be met the
specified film thickness.
3. Min 80% of the specified film thickness to be
attained on remaining 20% measuring points.
- 121 -
HALONG SHIPBUILDING Co.
section 5 painting part * Pre- treatment
5.6 PRE- TREATMENT FOR PAINTING
Kind of paint
Item Inorganic zincEpoxy resin conventional
MOISTURE Not to be visible to the naked eye
Salt “”
Oil/ grease Not to be visible. Trace of thinner wiping is permitted
Fat “”
Soap solution White deposits are not to be visible
Zinc saltTo remove white deposits, but the remaining trace may be visible
after sweep-blasting or power tooling
Fume by welding or
cuttingNot to be remained.
Chalk/ slate pencil
markTo be wiped with rags or brush. The trace be visible
Marking paint
In general,
not be
removed
In general, not to be removed.
But if highly sophisticated special
coating system to be applied,
usage of marking paint will be
advised by paint manufacturers.
Remaining trace may be visible.
Not to be
removed
Dust/ mud
contamination
Dust or mud contaminants to be removed with rags, broom or
vacuum cleaner to the possible extent.
Flying or suspension properties of fine-dust which could be excluded
by self-pressure of spray – gun may be accepted in the normal
shipbuilding practice.
- 122 -
HALONG SHIPBUILDING Co.
section 5 painting part * Pre- treatment
5.7 TREATMENT AT WELDING PART
Item Remarks
1) Spatters Stable spatters
Stable spatter contracted surface with mother
plate more than two-third of spatter width not
to be removed.
Stable spatter ( O )
Unstable spatters
Removable or unstable spatters to be removed
with grinder, disc-sander or chipping hammer.
Unstable spatter ( x )
For non-exposed
areas. ( Cargo hold
spaces, C. O. tanks,
W. B tanks, void
spaces, covered parts
of superstructures,
etc... )
Remain welding beads
2) Repair welding
bead of notches
For exposed areas.
( Exposed deck,
outside shells, engine
room passageways
etc... )
Welding and grind flush
- 123 -
HALONG SHIPBUILDING Co.
section 5 painting part * Pre- treatment
Item Remarks
3) Slag
Slag to be removed with grinder or disc-sander up to the
standard. But if not completely removes, trace or stain may be
left.
4) Rust and Heat scale
Rust and heat scale
- 124 -
HALONG SHIPBUILDING Co.
section 5 painting part * Pre- treatment
Item Remarks
5) Weld fume
Weld-fume
6) Repair of welding defect
After secondary surface preparation at each stage, the welding
defects found are to be repaired as follows
Grade Area DefectsRepair
Method
1
Butt & Seam lines
of side shell
Air, Water tight
boundaries
Blow hole
pin hole
Welding and
Grinding
Blow hole
pin hole
3 < D
“
2Major structural
members Blow hole
pin hole
3 D
Fill up with
epoxy putty
3
Common members
(Bracket, Stiffeners,
rolled angle, flat
bar)
Blow hole
Pin hole
“
( Not welding)
Repair
- 125 -
HALONG SHIPBUILDING Co.
section 5 painting part * damage part
5.8 DAMAGED PART
Item Remarks
Preparation
and
Feathering
( Wire brushing and/ or disc-sweeping etc... )
1) Rusted part and
block joint
Touch-up
The surface between coat and touch-up to be treated
with an elaborate workmanship as smooth as possible.
Roughness
Roughness of the profile after feathering to be treated
with an elaborate workmanship as smooth as possible.
- 126 -
HALONG SHIPBUILDING Co.
section 5 painting part * damage part
Item Remarks
2) Mechanical
damage on painted area.
( 1 ) In case damage reaches to bare steel:
- Adequate cleaning to bare steel according to the standard
referred.
- Repair coating as original system.
( 2 ) In case damage dosen’t reach to bare steel:
- adequate cleaning by appropriate methods to the paint film
affected.
- Repair touching-up as damaged film.
3) Wooden block boundary
area.
( New ship building )
Repair criteria of paint film damages.
Profile view of typical.
- 127 -
HALONG SHIPBUILDING Co.
section 5 painting part * damage part
Item Remarks
A’ Detail Repair method
Flat Bottom
- Squeezes
- Compression
1. Scraping
2. Fine papering
3. Touch up as
specified delicately.
* To be repaired as it is.
4) Spot rusted areaSpot-rusted part
- 128 -
HALONG SHIPBUILDING Co.
section 5 painting part * damage part
Item Remarks
5) Burnt part
- 129 -
HALONG SHIPBUILDING Co.
section 5 painting part * environmental
5.9 MANAGEMENT OF PAINTING WORKS
1) pre-coating
( Stripe coat )
2) Overrall coating Airless spraying or air spaying ( if necessary ) to be applied
5.10 ENVIRONMENTAL STANDARDS
1) Temperature
1) Substrate temperature to be kept above 50C
2) Surface temperature to be kept more than 30C above the dew
point.
2) Humidity Relative humidity to be kept below 85%
- 130 -
HALONG SHIPBUILDING Co.
section 5 painting part * final condition
5.11 SURFACE CONDITION OF FINAL COATING
Item Check Points
Where appearance of
special importance
( Exposed superstructure,
cabin, passages, etc...)
a ) Sagging, missing, brush mark, cracking, wrinkling and
holiday are not to be visible.
b) color of final coating is not to be different from the
specified.
c) Spray dust is not to be visible.
For visible parts other than
above ( inside of engine
room outside shell,
exposed part of decks,
stores and cargo hold,
etc...)
a) Missing, cracking, wrinkling and holiday are not to be
visible remarkably.
b) Sagging and brush mark not to be continued to large extent
on the surface.
c) Final color is not to be different from the specified color but
difference of color by aging at working stage which will be
equal in the end is permitted.
For invisible part, void
spaces and cofferdams,
cargo tanks, W. B. tanks,
etc...
a) Missing, cracking and holiday are not to be visible
remarkably.
b) Heavy sagging are not to be continued to large extent on the
surface.
c) The difference of the appearance is not to be severe.
- 131 -
HALONG SHIPBUILDING Co.
Section 6 Electrical part
6.1 CABLE INSTALLATION…………………………………………………………………….132
- CABLE WAY
- UNDER FLOOR METHOD
- CABLE TIE & BAND TAPE
- CABLE STAIR
- ROUND STAIR
- STAIR HEIGHT
- CABLE PIPE/ DUCT
- CABLE RADIUS ACCEPTANCE
- CABLE PENETRATION
- METHOD OF ENTERING CABLE INTO EQUIPMENT
- DETAIL OF CABLE THROUGH WITH M. C. T
6.2 WEATHER DECK FITTINGS ………………………………………………………………148
6.3 CABLE EXPANSION METHOD ……………………………………………………………150
6.4CABLE CONDUCT EARTH METHOD…………………………………………………… 150
6.5 STANDARD OF OPENING THE HULL ……………………………………………………151
- 132 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * CABLEINSTALLATION
Item
6.1. Electric cable installation
1.1 Turning method of main cable ways
1.1.1 In case of same height.
* In case of same height in relation to one and another way.
1.1.2. In case of different height
* In case of different height in relation to one and another way.
- 133 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * CABLEINSTALLATION
Item
1.1.3. In case of curved way
* The cable shall be installed on adequate supporter as shown on following
figure.
1.2. Branch cable way ( for example )
- 134 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * CABLEINSTALLATION
Item
1.3. Vertical main cable ways
- 136 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * CABLE Band
Item
1.5. Cable tie and binding tape
1.5.1. Cable tie
* The cable tie to be applied inside of switch board, control console, etc cable
fastening.
Symbol L Remark
CT- 100 100 MIL – S – 23190 D MS 3367 – 4
Ct – 175 175 MIL – S – 23190 MS 3367 - 1
- 137 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * CABLE Band
Item
1.5.2 Cable binding tape
* These binding tapes shall be used for cable securing and selected in accordance
with cable kind and / or their location. P. V. C coated BTN – 3, 4 type shall be used for
non-metallic sheath or non-armoured cable others ( BTM-1, 2 ) shall be used for metallic
sheath or armoured cable. For cable which are exposed to weather or installed in
refrigerated rooms, laundry, etc.. stainless steel tape shall be applied.
Symbol w t remark
BTN-1 15 0.5 elec.’ glav. ‘ steel
BTN-2 - “ stainless
BTN-3 “ “ elec. ‘ glav. ‘ steel ( PVC coating )
BTN-4 “ “ Stainless ( P. V. C coating )
- 138 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * cable stair
Item
1.6 Cable stair
1.6.1 Single stair combined method
H < 300 = 50 x 6. F. B H > 300 = 40 x 40 x 5 ANG.
WType Hanger Runner bar L
H < 300 H > 300
LA – 2 L- 2 25x 6 F. B 200 224 292
LA – 3 L – 3 “ 300 324 392
LA – 4 L – 4 38 x 6 F.B 400 424 492
LA – 5 L – 5 “ 500 524 592
LA – 6 L – 6 “ 600 624 692
LA - 7 L – 7 “ 700 724 792
LA – 8 L – 8 “ 800 824 892
LA – 9 L – 9 “ 900 924 992
LA – 1m L – 1m “ 1000 1024 1092
- 139 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * cable stair
1.6.2 Double stair combined method
1.6.3. Reversible single stair combined method.
- 140 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * cable stair
1.6.4 Round type stair
1.6.5 Adjustment of stair height
- 141 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * penetration
Item
1.7 Deck and wall penetration
1.7.1 Collar and coaming
Coaming dimension.
COAMTING COAMTINGNOA B
n TYPE NOA B
n TYPE
1 100 60 30 1 23 350 200 50 22 ″ 80 40 1 24 400 60 30 13 150 60 30 1 25 ″ 80 40 14 ″ 80 40 1 26 ″ 100 50 15 ″ 100 50 1 27 ″ 160 ″ 26 200 60 30 1 28 ″ 200 ″ 27 ″ 80 40 1 29 450 80 40 18 ″ 100 50 1 30 ″ 100 50 19 ″ 160 50 2 31 ″ 160 ″ 210 250 60 30 1 32 ″ 200 ″ 211 ″ 80 40 1 33 500 80 40 112 ″ 100 50 1 34 ″ 100 50 113 ″ 160 50 2 35 ″ 160 ″ 214 300 60 30 1 36 ″ 200 ″ 215 ″ 80 40 1 37 600 80 40 116 ″ 100 50 1 38 ″ 100 50 117 ″ 160 50 2 39 ″ 160 ″ 218 ″ 200 50 2 40 ″ 200 ″ 219 350 60 30 1 41 700 80 40 120 ″ 80 40 1 42 ″ 100 50 121 ″ 100 50 1 43 ″ 160 ″ 222 ″ 160 50 2 44 ″ 200 ″ 2
- 142 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * penetration
Item
1.7.2 Substantial for cable penetration
a. Substantial for non-watertight penetration
i) In case of no heat resisting steel wall, beam, girdes and long etc... to depend the
substantials as shown below.
ii) In case of heat resisting.
to be fitted to put about 10mm from the heat resisting surface a shown below.
- 143 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * penetration
Item
b. Substantial for watertight penetration
i ) In case of fitting of one by one gland
ii) Assembly fitting stuffing gland.
- 144 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * method ofentering cable
Item
1.7.3. Method of entering cable into equipment
a. For water tight gland
b. For coaming
- 145 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART *wall collar
Item
1.7.4 Detail of cable through deck & wall
a. A and B class steel Wall
i) Rectangular collar type
ii) Round collar type
Cable
- 146 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * coamings
Item
b. A class deck
i ) Rectangular coaming type
ii ) Round coaming type
- 147 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * M. c. t
Item
c. Multi cable transit
For A class deck in electric cable trunk shall be supplied.
- 148 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * fittingsinstallation
6.2 WEATHER DECK FITTINGS
2.1 Distance between steam pipe to cable
2.2 Cable grand install
2.3 Cable pipe thickness range for on deck and W.T or F.O tank penetration parts.
PIPE INTERNAL DIAMETER ( I. D ) MINIMUM THICKNESS
ID < 57.0 4.0
57.0 ID <152.4 4.5
152.4 ID <304.8 5.5
304.8 ID UNACCEPTABLE
- 149 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * fittingsinstallation
- 150 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * cableexpansion
6.3 CABLE EXPANTION METHOD
* MINIMUM RADIUS: CABLE O.D x 12 Times
3.1. CABLE HANGER TYPE
3.2. CABLE PIPE TYPE
6.4 CABLE CONDUCT EARTH METHOD
- 151 -
HALONG SHIPBUILDING Co.
SECTION 6 ELECTRICAL PART * HULL OPENINGMETHOD
6.5 STANDARD OF OPENING
5.1 TYPICAL
“A” SPACE “B” SPACESPACE
CONPENSATION
POSITIONWITHOUT WITH WITHOUT WITH
REMARK
CARGO OIL
TANK
d 1/5D
MAX=300
d 1/2D
MAX=300
d 1/10D d 1/4D
CARGO HOLD
ENGINE ROOM
d 1/4D d 1/2D d 1/8D d 1/4D
GIR
DE
R, W
EB SUPER
STRUCTURE
d 1/3D d 1/2D d 1/6D d 1/4D
SOILD FLOOR,
CONFFERDAM WEB
d 2/5D d 1/2D d 1/5D d 1/4D
DOUBLE BOTTOM
SIDE GIRDER,
DIAPHRAGM
d 3/5D d 2/3D- -
* NOTE:
GENERALLY IN “ C” SPACE, OPENING SHOULD NOT BE CUT, IF
UNAVOIDABLE FOR PIPING, ETC.. OPENING COMPENSATION SHOULD BE DESIGNED
AFTER CONSIDERING TYPE OF STRUCTUAL MEMBER AND ITS SIZE OF LOAD, ETC.
IF TO BE FITTED DOUBLING PLATE COAMING ( RING )
S1 = ( S – 1/2h ).
- 152 -
HALONG SHIPBUILDING Co.
section 6 electrical part * hull openingmethod
5.2 MIN. DISTANCE BETWEEN HOLE & HOLE, HOLE & END OF STRUCTURE MEMBER
A SPACE B SPACE C SPACE
1) HOLE AND HOLE
2
21 ddS
S=d1+d2
2) HOLE AND DECK
dS2
1 S=d
3) HOLE AND FACE BAR
S=d
(Min.75mm)
S=2+d
(Min.75mm)
4) HOLE AND SCALLOP
2
rdS
(Min.50mm)
S=d+R
(Min.50mm)
5) HOLE AND SLOT
2
dBS
S=B+d
IF2
dBS
S=B+d
TO BE FITTED
COLLAR PLATE
* NOTE:
GENERALLY WHEN DOUBLING PLATE OR F.B COAMING HAD SAME AS
HULL THICKNESS TO BE DESIGENED, “S” MAY BE REDUCED BY HALF OF DOUBLING
PLATE OR F.B COATING.
HOWEVER “ S” IS NOT TO BE LESS HALF OF STANDARD.
- 153 -
HALONG SHIPBUILDING Co.
section 6 electric part * hullreinforcement
5.3 HULL STRUCTURE OPENING HOLE REINFORCEMENT METHOD
5.3.1 DOUBLE PLATE INSTALL
a b/2
t1 t
5.3.2 RING STIFFENER INSTALL
5.3.3 PARTIAL INCREASING OF WEB DEPTH.
a b/2
t1 t
d Min. 25
a 1.5h
b L
h 3d-H
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