hstd-ptscmc-ts-q-pr-0001 dimension control procedure for topside fabrication
TRANSCRIPT
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8/10/2019 HSTD-PTSCMC-TS-Q-PR-0001 Dimension Control Procedure for TOPSIDE Fabrication
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THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG FULL FIELD AND HAI SU DEN EARLY
PRODUCTION SYSTEM DEVELOPMENT PROJECT
CONTRACTOR: PTSC MECHANICAL & CONSTRUCTION
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK FABRICATIONEPCI CONTR
ACT NO: CN3911008
DOCUMENT No.: HSTD-PTSCMC-TS-Q-PR-0001
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 2 of 18
Revision No.: 0Date:
17-Apr-2012
REVISION RECORD SHEET
No. Rev. No. Content of revision Date of Revision
1 A Issued for review 04-Apr-2012.
2 0 Issued for construction 17-Apr-2012
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 3 of 18
Revision No.: 0Date:
17-Apr-2012
TABLE OF CONTENTS
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
1.0 PURPOSE 5
2.0 SCOPE 5
3.0 REFERENCE 5
4.0 DEFINITION 5
5.0 PROCEDURE 5
5.1 RESPONSIBILITIES 5
5.2 EQUIPMENT 6
5.3 SURVEY CONTROL NETWORK 6
5.4 SETTLEMENT MONITORING. 75.5 METHOD OF DIMENSIONAL & LEVELING SURVEY 7
5.6 DRILLING DECK & TOPSIDE FABRICATION 8
5.7 PIPING 12
6 0 RECORDS 12
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 4 of 18
Revision No.: 0Date:
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1.0 PURPOSEThis procedure outline the methods of dimensional control survey to ensure specified
dimensional requirements are met in the final fabricated Drilling deck & Topside structures
and appurtenances.
2.0 SCOPE
This procedure is applicable to the following actions:- Material dimensional inspection on receipt.
- Assembly of Drilling deck & Topside and related component items (include: Main legs,
deck-legs, Elevation difference among platforms, conductor guide positions, crane pedestal
bearing surface, deck levelness).
- Final dimensional check the Drilling deck & Topside and Load-out.
3.0 REFERENCE (Latest revision)
API 2B Specification for the Fabrication of Structural Steel Pipe.EEMUA 158(2005) Construction Specification for Fixed Offshore Structures in the
North Sea.
AWS D 1.1 Structural Welding Code-Steel.
API RP 2A Recommended Practice for Planning, Designing, and Constructing Fixed
Offshore Platforms Working Stress Design, 21st Edition, December 2000.
GEN-0-00-S-
SP-0003_F01 Welding & Fabricating Offshore Structures
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 5 of 18
Revision No.: 0Date:
17-Apr-2012
5.0PROCEDURE
5.1 RESPONSIBILITIES
Foreman
- Shall be responsible for overall aspects of shift working which includes quality, health
and safety.
- Make recommendation to conduct improvement activities to improve productivity and
quality.
- To be responsibility of production team to liaise with DCS ensuring adequate notice is
given to allow surveys to be performed which meet the obligations of this procedure.
- Train subordinate to meet required standard of quality and output.
Dimensional Control Surveyor.
- The Dimensional Control Surveyorshall be responsible for ensuring that all surveys are
carried out accurately, efficiently and expeditiously, using calibrated equipment and
proven techniques.
- The DCSwill report directly to the Fabrication QAQC Manager. The DCSwill ensure
manning level which adequate service the needs of the production team progressing
fabrication efficiently. In turn, the production team will take account of the knowledge
and experience available, in terms of valid advice for the avoidance of dimensional
problems, when developing assembly and erection method statements.
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 6 of 18
Revision No.: 0Date:
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- Ensuring that the quality system meets requirements established in this specification.
- Ensuring all reports are correct and acceptably good for TLJOCs QC
acceptance/approved.
- Reviewing and approve all Dimensional reports.
- Monitor/Coordinate quality activities with production team.
5.2 EQUIPMENT( Reference to Appendix I).
- The Dimensional Control Surveyor will be equiped with a suitable supply of survey
instrumentation capable of dealing with complex 3D dimensional geometry. Instruments
will be calibrated regularly in accordance with good survey practice and records kept tothat effect.
- In addition, small tools such as tapes, squares, inclinometers spirit levels, string lines,
plumb bobs etc., all complying with recognized international manufacturing standards,
will be employed.
- Computers can be utilized to facilitate the reduction and computation of some of themore complex best fit solutions.
- Only approved equipments with valid calibration certificate shall be used.
Reference to Appendix I-List of Dimensional Control Equipments.
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 7 of 18
Revision No.: 0Date:
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- Initial observations around the network will be distilled to produce accurate coordinatesfor each station, and during the life of the project the network will be rigorously
monitored to maintain this accuracy.
- Temporary control stations, in times of peak fabrication activity, may be required to be
established and these will be related to the main control network through conventional
survey techniques such as triangulation, trilateration, braced quad, intersection, resection,
bearing and distance etc.
5.4 SETTLEMENT MONITORING.
- Prior to Lift of the Topside frames, a series of temporary Benchmarks(TBMs) will be
established at convenient location around Drilling deck & Topside erection area. The
height of these TBMs will be obtained using Level model AX 2S from permanent
benchmarks. The level of these TBMs will be obtained at weekly interval to monitor the
settlement.
- The result of the settlement monitoring will be issued as a dimensional survey report
using the initial elevation of each TBM as a datum.
5.5 METHOD OF DIMENSIONAL & LEVELLING SURVEY
The method of dimensional and levelling survey are as follows:
1. Survey of straightness:
The straightness survey shall be accomplished by means of measuring the external
surface of assemblies at two planes, i.e. "X" - "Y" direction with two ends zeroed and
readings at every 3m intervals utilisingpiano wire or thoedolite.
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 8 of 18
Revision No.: 0Date:
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The work point to work point survey shall be accomplished by measuring the intermediatedimensions (Elevation), overall lengths and squareness survey (cross dimensional) that
have been specified in the approval for construction drawing utilising measuring tape.
5. Survey of level:
The level survey shall be applied to the levelness or flatness of the assemblies i.e. jacket
braces and etc, with two ends at zeroed and reading at every 3m interval ulilising dumpy
level.
5.6DRILLING DECK &TOPSIDE FABRICATION.
5.6.1 CRITICAL ELEMENTS
The following items have been identified as critical elements in terms dimensional control
and will require having particular emphases applied in order to achieve minimum
dimensional deviations.
a. Deck legs and cone spacing.
b. Conductor guide positions.
c. Crane pedestal bearing, surface.
d. Deck levelness.
e. Crane slew bearing flatness and level.
f. Flare Boom.
5.6.2 TUBULAR MAKE UP (e.g. legs, crane pedestal, braces.)
a Single can.
- All single can tubulars shall be 100% dimensionally check. Checks shall be made 100%
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 9 of 18
Revision No.: 0Date:
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a. Engineering Department shall prepare shop drawing, cutting sheet for every beam.
Dimensional Control Surveyor shall conduct 100% dimensional check on beams based on
approved shop drawing.
b Dimensional surveys should demonstrate correct beam depth, flange width, web
verticality, flange rotation, web to flange eccentricity, beam straightness in two planes and
length of beams.
c If beam is splice in 2 sections, a fit up survey should check the straightness, reading at 3m
intervals and either side of the splice. Both camber and transverse deviations should be
noted.
5.6.4 SUB-CELLAR DECK, CELLAR DECK, DRILLING DECK, MEZZANINE
DECK, MAIN DECK, HELI DECK, FLARE BOOM.
a Basically the cellar/main deck comprises of deck legs attached to star plates. The star
plates are the members holding the main beams on both transverse and longitudinal side.
Pre and post dimensional survey is required for this assembly. See appendix II for
dimensional tolerances.
Interface dimension between mezzanine deck and main deck assembly to be checked for
proper alignment, levelling.
b Drilling deck will be fabricated separately and installed to jacket on offshore. Interface
dimension of conductors between drilling deck and top of jacket leg assembly shall be
dimensionally checked prior to install.
c Heli deck assembly shall be dimensionally checked prior to install into final position. This
is to be done after main deck has been dimensionally checked and installed.
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 10 of 18
Revision No.: 0Date:
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b As such pre-weld and post-weld survey check shall be conducted to ensure that the positiondeviations of the cone receiving cans are minimized. Weld shrinkage effects should be
anticipated by increasing fit up distances center to center.
5.6.6 CELLAR DECK ASSEMBLY
a The pre- assembly of the cellar deck transverse primary beam East/West in between leg
can to leg can and the cantilever beam will be post weld surveyed for erection. The leg willbe stabbed in to the transportation frame buckets, set at correct theoretical leg spacing.
b Check on the leg cans to conform the verticality and the levelness of the cellar deck. As the
intention is to erect the main deck with the short section of legs, this will ensure the proper-
fit-up of leg splices during the erection.
c Temporary supports shall be set at the correct elevation to attain the flatness of the primary
beams and pre/post weld check of the primary beams straightness, levelness and alignmentshall be checked.
d The North/South longitudinal primary beam in between North/South leg to leg can will be
erected first and follow up with the remaining beam, beams levelness and straightness
should be checked pre/post weld.
e The level of the primary beams shall be surveyed and the relationship of the primarystructural has been set to facilitate the secondary beams fit-up. As the cellar deck is loaded
up with secondary beams settlement should be monitored day to day basis, if the
settlement exceeds an agreed limit of 6mm corrective action shall be taken.
f Since conductor guide are considered critical the center point of the conductor guides
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
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Revision No.: 0Date:
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d The position of any free ends expected to accept cantilever/wing pallets will also be
surveyed.
e As the deck is loaded up the supports should be monitored for settlement and corrective
action taken if the settlement exceeds an agreed limit 6 mm.
5.6.8 INTER DECK BRACING
a The brace between the cellar deck and main deck will be installed after the cellar deck
erection and weld out and as equipment permits.
b Deck bracings are pre profiled and fit up checks shall include verticality and brace landing
surveys.
5.6.9 MAIN DECK ERECTION
a The whole main deck section will be subjected to post weld survey prior to erection. Post
erection check to conform the verticality of the leg and leg to leg spacing, section of the
legs length, deck elevation and deck flatness.
b The whole main deck assembly shall be erected/fitted-up on top of the cellar deck legs. The
full length legs dimension and elevation of the cellar deck to main deck and the main deck
level checks shall be perform to ensure erection fit-up is achieve.
5.6.10CRANE PEDESTAL ERECTION
Si il t th d k l th d t l ill b i t ll d i l i
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
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Revision No.: 0Date:
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a Other miscellaneous structural sub assemblies such as crane boom rest, mud splash walls,
emergency shelter wall, lift pad eyes etc... Should be surveyed on an as-required basis.
b Pipe support, piping vessel and equipment seating should be surveyed on an as requested
basis.
5.6.12LOAD-OUTS
a Load out operation shall be considered as having critical dimension input in term ofmonitoring barge ballast, monitoring lift off and set down operations and hard marking
layout match lines.
b Transverse and lateral derrick barge and transport barge movement shall also be monitored
during load-out, particularly critical for skidded load-out operations.
c Pipe support, piping vessel and equipment seating should be surveyed on an as requested
basis.
5.7 PIPING(Reference to piping fabrication procedure)
6.0 RECORDS
- Dimensional control reports shall generally be A4 sketches of the surveyed item. Each
sketch will have a unique project surveyor number and will reference the revision of the
shop drawing against which the deviations are being reported. Dimensional Controller shall
sign all dimensional inspection reports. Subsequent stages shall be performed if to be sure
that all assembly differentials are within tolerances described in the reports. If necessary,
the survey report will have its own revision status.
- In the reports, dimensions are in "mm"; theoretical dimensions are written in brackets
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
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All original reports will be kept in QA/QC department and will be available for TL JOC atany time. A copy of fit up surveys will be passed to production as evidence of compliance
with the project specification.
- The final as built dimensional report of steel structural part and components shall be
generated and signed by TL JOC representative.
- All original Dimensional Control Reports shall be filed in QAQC Department and the QAEngineer shall be responsible for these documents.
All dimensional control reports shall be submitted to TL JOC for verification.
List of asbuilt dimensional control Inspection reports as follows:
I. WHP HSD -TOPSIDE Before welding After welding
HSD Main Deck framing Plan X X
HSD Helideck framing Plan X X
HSD Elevation Grid Row B X X
HSD Elevation Grid Row 1 X X
HSD Elevation Grid Row 2 X X
HSD Drill Deck Framing plan and
Elevations
X X
HSD Drill Deck Stabbing Guide Post X XHSD Drill Deck Lifting Trunnion X X
HSD Crane Boom Rest X
HSD Crane Pedestal/Diesel Storage tank X X
HSD Lifting Padeye. X X
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 14 of 18
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7.0 APPENDICES
APPENDIX I
LIST OF DIMENSIONAL CONTROL EQUIPMENTS
No.Type of
EquipmentsSerial no. Purpose Remarks
01Total Station Leica
TS09-power 11315978
All dimension
checking
02Total Station Leica
TS09-Power 11300805
All dimension
checking
03Theodolite Model
NE-20H
055921
To ensure angle,
trigon metric
leveling and definestraight lines
04 Level Model AE-7C 277233 Check leveling
05 LevelCheck leveling,
plumpness.
06 Measuring Tape,Rule
Linear measurementand it apparatus
5m, 30m,50m
07 SquareTo ensure the angle
is square0.3m, 0.6m ..
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 15 of 18
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7.1 TOLERANCESSources: 1. Structural Welding and Fabrication Specification.
2. API-RP2A-WSD-Section 11.1.5.
3. API spec 2B: Specification for the fabrication of structural steel pipe.
4. AWS D1.1(2008). Section 5.23: Dimensional tolerance of welded structural
members.
5. EEMUA 158(2005) Construction Specification for Fixed Offshore Structures
in the North Sea.
APPENDIX II: TABLE OF DIMENSIONAL TOLERANCES
NO. DESCRIPTIONDIMENSIONAL
TOLERANCE
1
Top of the jacket and the bottom of the deck
columns, the horizontal distance from the
centerline of any column to the centerline of thecolumn adjacent in any direction.(Refer to
Section 11.1.5b-API RP2A).
10mm (3/8 inch) of the net
drawing dimension
2
At all deck levels, the horizontal distance from
the centerline of any column to the centerline of
the column adjacent in any direction.(Refer to
Section 11.1.5b-API RP2A).
13mm (1/2 inch) of the net
drawing dimension
3
Diagonals of rectangular plan layout between the
deck leg punch mark shall be
(Refer to Section 11.1.5b-API RP2A).
19mm from the design
dimensions
4
The centerline of deck beams/cap beams at their
ends should be within reference to section
11.1.5d API RP 2A.
13mm of the drawing
location.
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 16 of 18
Revision No.: 0Date:
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(refer to Section 6.4.1-EEMUA 158).
9
Walkways, stairways and landings shall be
positioned within the tolerance in relation to the
theoretical position (refer to Section 6.4.2-
EEMUA 158).
Deck plating level
Plate or grating joints shall be flat without
visible warping
12mm in elevation.
6mm in any 3m length.
12mm in horizontal position.
6mm in 3m.
Mismatch >2mm grating joints
shall be ground out and recoated.
10
Padeyes, padears and lifting trunnions location
and final orientation, work points shall be
located within the design radius sphere.(refer to
Section 6.3.4-EEMUA 158).
0.5 of final orientation.
15mm error on radius sphere.
11
The best-fit cente line for conductor guides of
the adjacent or nearest leg at the jacket-deck
interface level
At all other levels this tolerance
(refer to section 6.3.3 EEMUA).
10mm.
25mm
Tubular
Circumference (at joints or within 610 mm
from the joint).
Circumference ( he remaining length of thetubular). Reference to section 6.2.1.1 of
EEMUA 158.
Ovality (Dn 610)
Tubular
30% of tn or 10mm
(whichever is smaller)
45% of tn or 15mm(whichever is smaller)
Not exceed 1% Dn.
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 17 of 18
Revision No.: 0Date:
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Abbreviation:tn : Nominal wall thickness
Dn : Nominal externaldiameter
Cn : Nominal circumference
OD: Outer diameter
c : Circumference tolerance
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PTSC TLJOC
THANG LONG JOINT OPERATING COMPANY
HAI SU TRANG DEN PROJECT
EPCI OF HAI SU TRANG, HAI SU DEN AND PIPELINESDocument No :
HSTD-PTSCMC-TS-
Q-PR-0001.
DIMENSIONAL CONTROL PROCEDURE
FOR TOPSIDE AND DRILLING DECK
FABRICATION.
Page 18 of 18
Revision No.: 0Date:
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APPENDIX III: DIMENSIONAL CONTROL INSPECTION REPORT.
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