is 2762 (2009): wire rope slings and sling legs...two-, three and four-leg slings of wire rope of...
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IS 2762 (2009): Wire Rope Slings and Sling Legs [MED 10:Wire Ropes and Wire Products]
July 2009
IS 2762 : 2009
CfT<:R m ft-c;R:r ~ ~~ - ~
( Ci'!-NI ~erur )
Indian Standard
WIRE ROPE SLINGS AND SLING LEGS SPECIFICATION
( Second Revision)
ICS 53.020.30; 77.140 .65
© BIS 2009
BUREAU OF INDIAN STANDARDSMANAK BHA VAN. 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
Price Group 7
Wire Ropes and Wire Products Sectional Committee, MED 10
FOREWORD
This Indian Standard (Second Revision) was adopted by the Bureau oflndian Standards, after the draft finalizedby the Wire Ropes and Wire Products Sectional Committee had been approved by the Mechanical EngineeringDivision Council.
This standard was first published in 1964 and revised in 1982. The experience gained in the implementation ofthe first revision and the prevailing practices in the industry necessitated the present revision.
Safe working load at different methods of loading is given in Annex A. Guidelines for use of slings is given inAnnex B. Discard criteria is given in Annex C.
The composition of Committee responsible for the formulation of this standard is given in Annex D.
For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960'Rules for rounding off numerical values (revised)'. The number of significant places retained in the rounded offvalue should be the same as that of the specified value in this standard.
IS 2762 : 2009
Indian Standard
WIRE ROPESLINGS AND SLINGLEGS SPECIFICATION
( Second Revision )
1 SCOPE 3 GENERAL REQUIREMENTS
2 REFERENCES
NOT!,! - The guidelines for use of slings and the discardcriteria for slings have been included in Annex B and AnnexC respectively.
The following standards contain provisions, whichthrough reference in this text, constitute provisionsof this standard. At the time of publication, theeditions indicated were valid . All standards aresubject to revision, and parties to agreements basedon this standard are encouraged to investigate thepossibility of applying the most recent editions ofthe standards indicated below:
This standard specifies dimensions, construction, methodof loading, testing, marking and certification of one-,two-, three and four-leg slings of wire rope of nominaldiameters from 6 mm to 60 mm of the following typeswith hand or mechanically spliced eye termination:
a) Single part sling,
b) Double part endless sling, and
c) Double part grommet sling.
3.1 Type of Rope
The type of rope to be used shall be a six stranded fibreor steel core or eight stranded steel core, ordinary lay,rope grade 1770 as specified in IS 2266. Use of higherrope grade is permitted but the safe working load shallbe calculated on the basis of rope grade of 1770 only.
NOTE - The safe working load of the sling used in specialapplication. however can be calculated on the basis of actualrope grade and construction with the agreement betweenthe manufacturer and the user.
NOTE - Use of other types of ferrule is permitted asagreed to between the purchaser and the manufacturer.
3.2 Formation of Eyes
Eyes of sling legs shall be formed by using handsplicing or mechanical splicing using ferrulesconforming to IS 10942. Such eyes shall be soft eyesor reinforced with thimbles as per the requirement.
3.2.1 Soft Eyes
The length of the soft eye shall be minimum twelvetimes the rope diameter unless otherwise specified.The width of the eye shall be approximately half ofits length. In order to protect the bearing surface ofthe soft eye, a stirrup may be fitted. The bearing pointover which the soft eye used shall be more than twicethe rope diameter for single part sling and four timesthe rope diameter in case of endless type sling.
3.2.2 Eyes Reinforced with Thimble
These thimbles shall be of galvanized ordinary,reeving or solid type appropriate for the size of ropeused, conforming to IS 2315.
3.2.3 Hooks
Eye hooks shall be of mild steel conforming to IS 2758or of high tensile steel conforming to IS 2759.
3.2.3.1 The safe working load of the hook shall not beless than that of the leg to which it is attached .
3.3 Master Links (Rings)
Steel rings shall conform to IS 2760.
TItle
Carbon steel billets, blooms, slabsand bars for forgings (fifth revision)Steel wire ropes for generalengineering purposesSpecification (fourth revision)Specification for thimbles for wireropes (first revision)Mild steel point hooks for use withwire rope thimblesHigher tensile steel point hooks foruse with wire rope thimblesSpecification for steel chain slings(first revision)Methods for splicing of wire ropes:Hand splicing of wire ropesWin: rope sling legs with ferrulesecured eye terminalsFenules - Specification (firstrevision)Quality management system Requirements
2758: 1969
IS No.
1875 : 1992
2266 : 2002
2315 : 1978
2759: 1969
2760: 1980
5245(part I) : 1969(Part 2) : 1971
10942: 2000ISIISO 900 I :
2000
IS 2762 : 2009
3.3.1 Mild Steel Rings
Mild steel rings shall be made from steel of Class. l A,Designation 2OC8 of IS 1875. The rings ~ay be elt~er
weld less or welded. When welded, the mild steel nngshall be made by one of the following methods:
a) Electrical resistance butt
weldingb) Rash-butt welding Suitable for
c) Atomic hydrogen welding sizes above
d) Inert-gas shielded-arc 50mmwelding diameter
e) Submerged arc welding
f) Covered electrode welding
The rings shall be smoothly finished all round, and ifthey are welded, care shall be taken to avoid porosityand to ensure penetration and fusion throughout. Wheninspection by radiography is required by the purchaser,this shall be specified at the time of enquiry and order.The mild steel rings shall be normalized by heatinguniformly in a furnace until the whole of the metal hasattained a temperature between 880°C and 910°C. Therings shall then be withdrawn from the furnace andallowed to cool in still air. In all other respects , themild steel rings shall comply with the requirementsspecified in IS 2760 .
3.3.2 High Tensile Steel Rings
High tensile steel rings shall comply with IS 2760. Thedimensions of master links (rings) can be calculatedusing formulae as given in Annex A.
3.3.3 The main and intermediate rings shall withstandthe respective rated safe working load for the sling legs.
4 SINGLE PART SLING
A sling that has been made with only one part of ropeis called a single part sling.
4.1 Minimum Length
To provide adequate flexibility and to allow splicing,the effective length of a single part sling shall not beless than 70 times the rope diameter. The actual lengthof a sling shall not differ from the nominal length bymore than two rope diameters or I percent of thenominal length whichever is greater, The measurementshall be taken without applying any load.
4.1.1 Length ofMatched Sets
The difference in length of matched sets of mechanicallyspliced slings shall not exceed the rope diameter or 0.5percent of the nominal length, whichever is greater. Thedifference in length of matched sets of hand splicedslings shall not exceed twice the rope diameter or Ipercent of the nominal length whichever is greater.
2
4.2 Fabrication
4.2.1 Hand Splicing
Hand splicing shall be done as per IS 5245 (Part I). Eachhand splice shall have at least five tucks - three tuckswith full strand of the rope and two tucks with the strandafter removing half the number of wires from the innerlayer. The tucks shall be over and under against the layof the rope. The splice shall be tightly drawn and madeneatly. The approximate length of five tuck spliceexclusive of the thimble is 20 times the diameter of therope. The portion of the hand splicing which containsthe wire ends shall be served neatly and effectively withspun yarn or seizing wire or strand to extend protectionto injury during usc. Alternatively, when required by thepurchaser, the full length of the splice may be served.
4.2.2 Mechanical Splicing
The splicing may also be done by mechanical meansor swaging as required by the purchaser. Mechanicalsplicing shall be done as per IS 5245 (Part 2).
, 4.3 Safe Working Load
The safe working load (SWL) of a single part sling forstraight pull can be calculated as follows:
F xKSWL= ° I
9.80665 x Zp
where
Fo = minimum breaking force of the rope,
K, = splicing efficiency factor (0 .8 for handsplicing and 0.9 for mechanicalsplicing),
9.806 65 = constant for converting force unit (kN)to mass unit (tonne), and
zp = (5) Coefficient of utilization.
5 DOUBLE PART ENDLESS SLING
A sling that is made endless by splicing the ends andsubsequently folded to form double part sling .
5.1 Minimum Length
To prov ide adequate flexibility and to allow splicing,the effecti ve length of a double part endless sling shallbe not less than 70 times the diameter of the rope usingord inary thimble and 80 time s the diameter of the ropeusing reeving thimble. The length of an endless slingshall be taken to behalf the circumference of the circleformed on the centre line. The actual length of a slingshall not differ from the nominal length by more thantwo rope diameters or I percent of the nominal length ,
. whichever is greater. The measurement shall be takenwithout appl ying any load .
5.1.1 Length of Matched Sets
The difference in length of matched sets ofmechani cally spliced slings shall not exceed the ropediameter or 0 .5 percent of the nominal length .whichever is greater. The difference in length ofmatched sets of hand spliced slings shall not exceedtwice the rope diameter or I percent of the nominallength, whichever is greater.
5.2 Fabrication
5.2.1 Hand Splicing
5.2.1.1 The initial length of the straight rope shall beplaced overlapping two ends. The ends shall then bespliced at each side with a five tuck splice. making thecomplete splice ten tucks altogether. Hand splicing ateach side shall have five tucks - three tucks with fullstrand of the rope and two tucks with the strand afterremoving half the number of wires from the inner layer.
.The tucks shall be over and under against the lay ofthe rope. The splice shall be tightly drawn and madeneatly. The approximate length of a ten tuck splice is40 times the diameter of the rope .
5.2.1.2 At those portions of the hand spliced endlessrope which will seat in the thimble grooves, the singlepart of the rope shall be served with spun yarn to suitthe grooves in the oversize thimble and to provide afoundation for the throat seizing. The length of eachserving shall be such that in addition to the portion incontact with the thimble groove. it underlies andprojects three rope diameters beyond the throat seizing.
5.2.1.3 Those portions of the splice which contain thewire ends shall be neatly and effectively served withspun yarn or seizing wire/strand to extend protectionto injury during use. Alternatively. when required bythe purchaser the full length of the taper splicing zonemay be served.
5.2.1.4 The hand spliced endless rope shall have itstwo parts brought into parallel contact with the twoserved portions forming the bight at each end. Athimble shall be throat size close up to its point intoeach bight of the rope by means of a suitable annealedquality galvanized wire/strand. The overall length ofeach throat seizing shall not be less than six times thediameter of rope .
5.2.1.5 The seizing shall be tightly drawn and neatlymade, free from projections liable to cause injuryduring use. When the sling leg exceeds 100 times thediameter of the rope. a central seizing equal to threetimes the diameter of rope shall be provided. In caseof longer sl ing leg intermediate seizing of abovelength shall be provided at intervals not greater than72 times the rope diameter.
3
IS 2762 : 2009
NOTE - Unless specified otherwise. one end of the tenluck served spliced poinl shall remain adjacent but clear ofthe thimble . in the finished sling leg.
5.2.2 Mechanically Spliced
The splicing may also be done by mechanical meansor swaging as required by the purchaser.
5.3 Safe Working Load
The safe working load (SWL) of a double part endlesssling for straight pull can be calculated as follows:
2xF;, ««,SWL = ---''-----'
9.80665 x z,
Fo = minimum breaking force of the rope,
K, = splicing efficiency factor (0.8 for handsplicing and 0 .9 for mechanicalsplicing).
9.806 65 = constant for converting force unit (kN)into mass unit (tonne) used in liftingapplication. and
zp = (5) Co-efficient of utilization.
6 DOUBLE PART GROMMET SLING
6.1 Wire Rope Grommet
Wire rope grommet is an endless wire rope made fromone continuous length of strand formed to make a bodycomposed of six strands around a strand core. Thestrand ends are tucked into the body forming the corewith the tuck position diametrically opposite to the corebutt position.
6.2 Minimum Length
To provide adequate flexibility the effective length ofa double part grommet sling shall not be less than 40times the diameter of the rope when using ordinarythimbles and not less than 50 times the diameter of therope when using reeving thimbles. The tolerance inlength of the grommet shall be ± 0.5 percent of thenominal circumferential length or ± 0.5 x d whicheveris greater (d = diameter of the single part of thegrommet). The measurement shall be taken withoutapplying any load .
6.3 Fabrication
6.3.1 Fabrication shall be done as per IS 5245 (Part I) .
6.3.2 The strand used to produce a wire rope grommetshall be one of those required to form a six strandedrope of a construction as described in IS 2266 in righthand ordinary lay. fibre main core with wires of tensiledesignation of 1770. During production of grommet atemporary rigid circular core shall be used over which
IS 2762 : 2009
the strand shall be laid side by side using a methodwhich ensures that the strand tensions are equalizedand the finished product is free from visible waviness.The grommet lay factor shall not be more than 8 timesthe nominal diameter of the rope. The crossing of thetucks shall be placed adjacent to, but clear of, onethimble and under the throat seizing in the finishedsling leg. Those portions of the grommet which wiIIseat in the thimble grooves, the single part of the ropeshall be served with spun yarn to suit the grooves inthe oversize thimbles and to provide foundation to thethroat seizing. The length of each serving shall be suchthat, in addition to the portion in contact with thethimble groove it underlines and projects three ropediameters beyond the throat seizing.
6.3.3 The finished grommet shall have its two partsbrought into parallel contact with the two servedportions forming the bight at each end. A thimble shallbe throat seized close up to its point into each bight ofthe rope by means of annealed quality galvanized wire/strand. The overall length of each throat seizing shallnot be less than six times the diameter of the rope. Theseizing shall be tightly drawn and neatly made freefrom projections liable to cause injury during use.When the sling leg exceeds 100 times the diameter ofthe rope a central seizing equal to three times thediameter of the rope shall be provided. In case of longersling legs, intermediate seizing of above length shallbe provided at intervals not greater than 72 times thediameter of the rope.
6.4 Safe Working Load
The safe working load (SWL) of a double part grommetsling for straight pull can be calculated as follows:
SWL= 2xFo xK.9.806 65x;
F0 = minimum breaking force of the unit ropewith fibre main core and wire tensileDesignation of 1770 whose strand isutilized in making the grommet,
K, = (0.80) Splicing efficiency factor,
9.806 65 = constant for converting force unit (kN)into mass unit (tonne) used in liftingapplication, and
Zp = (5) Coefficient of utilization.
7 SLINGASSEMBLIFS
7.1 The assembled slings shall be one of the formsshown in the Fig. 1 to 10.
7.2 ComponentsAttadunent
The components for all slings shall be spliced or
4
seized (as may be appropriate) directly to the slingleg, with the exception of four-leg slings, which shallcomprise two-leg assemblies complete withintermediate rings and a main ring. The welding andheat treatment of the rings shall be completed beforethe wire rope legs are attached.
7.3 Effective Length
The effective length of all slings and sling legs shallbe the length between the bearing points of theirterminal components like thimble, ring or hook unlessotherwise specified. The measurement shall be takenwithout applying any load. For multi-leg slings theactual individual leg lengths shall not differ from thenominal length of the sling by more than two ropediameters or I percent of the nominal length whicheveris greater. The difference in length between theindividual legs of any multi-leg sling shall notexceed 1.5 times the rope diameter or 0.5 percent ofthe nominal length whichever is greater.
8 TESTING
Before assembly all rings and hooks shall be tested toa proof load which is equivalent to twice the safeworking load. A sample of rope shall be testedaccording to IS 2266. After fabrication of sling, eachsling leg shall be tested to a proof force which isequivalent to twice its safe working load.
8..1 Extent of Manufacturing Proof Force Testing
The manufacturing tests shall depend on whether themanufacturer has an applicable quality managementsystem or not. The system shall comply with aninternationally acceptable standard like IS/ISO 9001and be certified by internationally accredited third partycertification body. If such system is in place andoperating, the test described in 7 shall be designatedas type test and shall be carried out by the slingmanufacturer as per their quality plan and shall bepresented to the customer or his representative forverification whenever required. Every non-standard orone-off sling assembly shall be tested in accordancewith 7.
9 METHOD OF LOADING
9.1 The safe working load for slings as given in 4.3, 5.3and 6.4 is for one sling under straight pull. Slingshowever can be utilized using different methods ofloading as described in Annex A. The safe workingload under each method of loading can be worked outusing the appropriate factor given in Annex A. Thesafe working load and the proof load for the masterring may also be calculated under different conditionsas given in 9.2 and 9.3.
9.2 After final heat treatment of the master ring andintermediate ring the slings with accessories shall betested as an assembly. Multi-leg wire rope slings shall,however, be tested in sections as given in Table I.
9.3 Proof Load
Proof load for the rope, master ring, intermediate ringand the complete assembly shall be equal to doubletheir respective safe working load for the angle ofapplication, as given in 9.2.
IS 2762 : 2009
10MARKING
10.1All slings shall be marked legibly on,
a) a durable metal label or a sleeve firmlyattached to the sling;
b) body of the ferrule (without causing anydamage); and
c) master link (ring).
with at least following information:
EFFECTIVELENGTH
1A 1B 1C
1A Single Part Sling1B Double Part Endless Sling1C Double Part Grommet Sling
FIG. lONE-LEG WIRE ROPE SUNGS WITHORDINARYTHIMBLES ATBOllI ENDS (HAND SPLICED)
5
'"
EFFECTIVELENGTH
EFFECTIVELENGTH
EFFECTIVELENGTH
til
~
~
2A 28 3A 38 3C 3D
2A Single Part Sling
28 Double Part Endless Sling3A Ordinary Thimble at One End
Reeving Thimble at Other End3B Reeving Thimbles at Both Ends
3C Ring at One End
Ordinary Thimble at Other End
3D Ring at One End, Hook at Other End
FIG. 2 ONE-LEG WIRE ROPE SLING WITH ORDINARY THIMBLES
AT BOTH ENDS (MECHANICALLY SPLICED)FIG. 3 ONE-LEG WIRE ROPE SLINGS
(HAND SPLICED)
EFFECTIVELENGTH
40
EFFECTIVELENGTH
4C48
EFFECTIVELENGTH
4A
....,
FIG. 4 ONE-LEG WIRE ROPE SLING
(MECHANICALLY SPLICED)
4A Ordinary Thimble at One EndReeving Thimble at Other End
48 Reeving Thimbles at Both Ends
4C Ring at One End, Ordinary Thimbleat Other End
40 Ring at One End, Hook at Other End
FIG. 5 Two-LEG WIRE ROPE SLINGS WITHMAIN RING AT ONE END,
HOOKS ATOrurn ENDS (HAND SPLICED)
r;;~~
§
EF"F'ECTIVELENGTH
~
fiJ
~
fCG~
00
FIG. 6 Two-LEO WIRE RoPE SUNG WITHMAIN RING
ATONE END. HOOKSAT0nmRENDs(MSCHANlCAU.Y SPUCED)
FIG. 7 THREE-LEG WIRE ROPE SLING WITH MAIN RING
ATONE END , HOOKS ATOTHER ENDS
(HAND SPLICED)
EFFECTIVELENGTH
\0
reG~
FlO. 8 THREE-LEG WIRE ROPE SLING WITH MAIN
RING ATONE END, HOOKS ATOrnER ENDS
(MECHANICALLY SPLICED)
FIG . 9 FOUR-LEG WIRE ROPE SLING WITH MAIN AND INTERMEDIATE
RINGS ATONE END, HOOKS ATOTHER ENDS
(HAND SPLICED)
rii~~
~
IS 1:162: 2009
FIG . 10FOUR-LEG WIRE ROPE SLING WITHMAIN AND INTERMEDIATE RINGS AT ONE END, HOOKS
AT OTHER ENDS (MECHANICAU.Y SPLICED)
i) unique reference number identifying thesling with its test certificate,
ii) the safe working load of the sling for singleleg sling or the safe working load(s) related tothe leg angle(s) in case of multi-leg sling, and
iii) month and year of manufacture.
10.2 DIS Certification Marking
Each sling may also bemarked with the Standard Mark.
10.2.1 The use of the Standard Mark is governed bythe provisions of the Bureau of Indian Standards Act,1986 and the Rules and Regulations made thereunder.The details of conditions under which a license forthe use of Standard Mark may be granted to the
10
manufacturers or producers may be obtained from theBureau of Indian Standards
11 CERTIFICATE OF TEST AND EXAMINATION
Every sling or batch of sling s shall be provided with atest certificate issued by a competent person givingthe following information:
a) Name of the manufacturer/ supplier,
b) Full description of the sling,
c) Safe working load,
d) Tested to proof load ,
e) Date of test, and
f) Specification No.
Table 1 Safe Working Load(Clause 9.2)
IS 2762 : 2009
SI No. Number Angle of Safe Working Load Remarksof Legs Usage
.A
DegreeRope Master Ring Intermediate Ring Complete Assemb ly
(I) (2) (3) (4) (5) (6) (7) (8)
! i) I 0 W 1.0 W - 1.0 W -! 0 W 2.0W - 2.0W,
90 W 1.4 W - 1.4 WJ i I .~ 2! ! 120 W 1.0 W - I.OW CriticalJ 2A W 2WcosA 2 W cos A :-
-i0 W 3.0 W 1.0 W 3.0W90 W 2.1 W 1.0 W 2.1 W
!iii) 3 120 W 1.5 W 1.0 W I.5W Critical i
2A W 3WcosA 1.0 W 3WcosA I0 W 4W 1.0 W 4W
iv) 490 W 2.8W 1.0 W 2.8W120 W 2.0W 1.0 W 2.0W Critical2A W .4 W cos A 1.0 W 4 Weos A
NOTES
1 A - Angle be tween any leg and the vertical line through the support point .
2 W - Sa fe wo rking load .
ANNEXA(Foreword, and Clauses 3.3.2 and9.1)
SAFE WORKING LOAD AT DIFFERENT METHODS OF LOADING
Nominal Single Part Double Part Endless and Two-Leg Three-Leg Four-LegRope (Single Leg) Grommet
DiameterStraight Choke Straight Choke Straight 0° <o s 90° < a :5 0° < a :5 90° < o s
Pull Hitch Pull Hitch Pull 90° 120° 90° 120°
(I No.) (2 No.)
mm t t t t t t t t t t t t t
Factor 1.00 0.80 2.00 1.60 2 x 2 lAO 1.12 1.00 0.80 2. 10 1.50 2.80 2.00
Coefficient of utilization: 5
Angle subtended by the slings at the point of lifting: a
Load (mass) for lifting: t (tonne)
II
IS 2762 : 2009
ANNEX B(Foreword, and Clause I)
GUIDELINES FOR USE OF SLINGS
a) Assess load to he lifted and its position ofcentre of gravity .
b) Ensure that a proper sling is chosen for liftingthe load.
c) Select the appropriate method of slinging.
d) The effective diameter of double pan shouldnot be less than twice the diameter of rope.
e) While fitting eye termination particularlywith thimble reinforcement to the liftinghook. ensure that it is seated properly withoutovercrowding.
f) Slings shall not be used for bending orstrapping unless they are so designed forlifting purposes.
g) Avoid use of lang' s lay rope for making sling.
h) Do not use hand spliced sling if it is likely torotate during lifting the load.
j) Lift the load slowly avoiding jerk, shock. etc .
k) Capacity of master link (ring) shall be at leastequal to the capacity of the full sling. Forintermediate link (ring) it shall be at least 1.4times that of one sling leg.
m) For two or more leg slings. maximumpermissible angle to the vertical for any slingleg shall not be more than 60°.
n) Do not use sling beyond its permissibleservice temperature as given below:
Type of Wire Service BearingSplicing Rope Tempera- Capacity
With ture Percent°C
Mechanica- Fibrelly spliced core --{i0 to +100 100with Alumi-
Steelnium-ferrule core
Fibre --(i() to + I00 100core
Hand--{i0 to +250 100
spliced Steel +250 to +400 75core
ANNEX C(Foreword, and Clause 1)
D~ARDCRnE~FORSL~GS
C·I Presence of broken wires, excessive wear.mechanical and other damages due to heal, chemicalreaction etc. are the main criteria for discarding a slingduring use. Appearance of any of the following kindsof damage shall be a reason to withdraw a sling fromthe service:
a) Broken strand.
b) Slackening under no load.
c) Crushing under no load.
d) Visible wire breakage at any point on a sling
12
for a length of:
3 x d» four numbers
6 x d » six numbers
30 x d » sixteen numbers
where d is diameter of rope.
e) Crushing at the load bearing point of the eyealong with four broken wires.
f) Kink formation.
g) Sign of corrosion.
h) Damage or undue wear at the eye termination.
IS 2762 : 2009
ANNEX D(Foreword)
COMMIITEE COMPOSITION
Wire Ropes and Wire Products Sectional Committee. MED 10
Organization
Directorate General of Mines Safety. Dhanbad
Amar Promoters Pvr Ltd. Solan
Bharat Coking Coal Ltd. Dhanbad
Bharat Wire Ropes Ltd. Mumbai
Central Institute of Mining and Fuel Research. Dhanbad
Directorate of Quality Assurance. New Delhi
Directorate General Factory Advice Service & Lab Institute.Mumbai
Directorate General of Aeronautical Quality Assurance.New Delhi
Directorate General of Civil Aviation. New Delhi
Directorate General of Suppliles & Disposals (QualityAssurance Wing). New Delhi
Eastern Coalfields Ltd. Kolkata
Ministry of Shipping, New Delhi
National Test House. Kolkata
Oil and Natural Gas Commission. Dehra Dun
Orient Win: Ropes, Indore
Paradip Port Trust, Paradip
South Eastern Coalfields Ltd, Bilaspur
Tata Steel Ltd. Dhanbad
The Shipping Corporation of India Ltd. Mumbai
The Singareni Collieries Co Ltd, Andhra Pradesh
Usha Breeo Ltd. Dist Ghaziabad (UP)
Usha Manin Industris Ltd. Ranchi
Vidarbha Hardware Industries. Akola
BIS Directorate General
Representative!s)
SHat T. S. MUKHEIUEE (Clulm..lI)DEI'lJrY DIREnoll (Mr£H). HQ IAlumau)
SHat VIRENDER AGAIlWAtSHIll JATlNDfJl AGAIlWAt (AltrrlllJtr)
SHRI RAMJI SAHAY
SHRI D. M. SHAHSHill ASHWINI LOKHANOC (AltrrlllJlr)
SHill AWADHESH MAHTOSHill S. K. RITOUA (Altrrnau)
COL P. K. SRIVASTAVACOL V. V. KADAM (Alumau)
SHRI G. M. E. K. RAJSHRI S. N. BORKEIt (Alur"at~)
SHill S. B. PRASADSHat SANJAY CHAWlA (Allrrnalr)
SURI R. C. GUPTASHRI M. M. KAUSHAt (Altana/~)
SHRI R. K. AGARWALSHat AIOOLESH KUMAR (Alt~rnau)
SHRI CHATTElUEESHRI KAPIL K. RAI (Altunat~)
SHill A. R. RAOSHill D. J. BASU (Alt~rnau)
SHRI S. P. RoySHRI R. N. RAM (Alternate)
SHill R. K. GARGSHill P. K. Sooo (Alt~l7JQu)
SHRI SAMF.FJl GoLWELKARSHill SIlISHlR AKARTF. (Alt~matt)
SUR' B. B. PAHIGRAHISHIU MOHAN PATEL KHErRA (Alt~mau)
SMaI S. K. MISURASHat G. RANASWAMI (Alt~l7JQte)
SHIU 50uMENDlI K. MAlHISHIU A. K. SIL (Alurnat~)
SHRI G. S. BHALLACAPT R. MODI (Alt~rnau)
Sill IVN PRAsADA RAOSilt P. V. RiIOHAVA RAJU (Alt~mat~)
SMaI RAJl!SH PRASADSHill MANOJ PANWAII (Alt~rnat~)
SHIU SUIlIlATA DunASHIll S. B. N. SHARMA (Alurna,,)
SHIU OM PRAKASH DALMIASHRI SANJAY O. DAuelA (Alt~mau)
SHill C. K. VEllA. Scientist 'F & Head (MED)[Representing Director General (Ex-officio]
M~mbuMcrrtarySHIU D. K. DAS
Scientist 'E' (MED), BIS
13
Bureau oflndian Standards
BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.
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Reviewoflndian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of'BIS Catalogue' and 'Standards: Monthly Additions'.
This Indian Standard has been developed from Doc No.: MED 10(0857).
Amendments Issued Since Publication
Amend No. Date of Issue Text Affected
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