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STEEL TUBES FOR STRUCTURAL PURPOSES - Sagar …

IS 1161 : 1998(Reaffirmed 2003)Edition (2006-04)B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARGNEW DELHI 110002 Price Group 3 BIS 2007 Indian StandardSTEEL TUBES FOR STRUCTURAL PURPOSES SPECIFICATION( Fourth Revision )(Incorporating Amendment Nos. 1 & 2)ICS ; TUBES , Pipes and Fittings Sectional Committee, MTD 19 FOREWORDThis Indian Standard (Fourth Revision) was adopted by the Bureau of Indian Standards, after thedraft finalized by the STEEL TUBES , Pipes and Fittings Sectional Committee had been approved bythe Metallurgical Engineering Division standard was first published in 1958 and its first, second and third revisions were issued in1963. 1968 and 1979 respectively. While reviewing the standard, the Committee has felt itnecessary to revise this Indian Standard with the following modifications:In the formulation of this standard, due consideration has been given to the trade practicesfollowed in the country in this field.

Steel Tubes, Pipes and Fittings Sectional Committee, MTD 19 FOREWORD This Indian Standard (Fourth Revision) was adopted by the Bureau of Indian Standards, after the

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Transcription of STEEL TUBES FOR STRUCTURAL PURPOSES - Sagar …

1 IS 1161 : 1998(Reaffirmed 2003)Edition (2006-04)B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARGNEW DELHI 110002 Price Group 3 BIS 2007 Indian StandardSTEEL TUBES FOR STRUCTURAL PURPOSES SPECIFICATION( Fourth Revision )(Incorporating Amendment Nos. 1 & 2)ICS ; TUBES , Pipes and Fittings Sectional Committee, MTD 19 FOREWORDThis Indian Standard (Fourth Revision) was adopted by the Bureau of Indian Standards, after thedraft finalized by the STEEL TUBES , Pipes and Fittings Sectional Committee had been approved bythe Metallurgical Engineering Division standard was first published in 1958 and its first, second and third revisions were issued in1963. 1968 and 1979 respectively. While reviewing the standard, the Committee has felt itnecessary to revise this Indian Standard with the following modifications:In the formulation of this standard, due consideration has been given to the trade practicesfollowed in the country in this field.

2 Due consideration has also been given to internationalco-ordination among the standards prevailing in different countries. Assistance has been derivedfrom the following publications:ISO/R 336 : 1976 Plain end STEEL TUBES , welded or seamless; general table of dimensions andmasses per unit length. International Organization for 6323 : 1982 STEEL TUBES for mechanical and general engineering PURPOSES . British standard contains clauses and which call for agreement between the purchaser andthe edition incorporates Amendment No. 1 (March 2000) and Amendment No. 2 (April 2006).Side bar indicates modification of the text as the result of incorporation of the 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 roundedoff in accordance with IS 2 : 1960 Rules for rounding off numerical values (revised).

3 The numberof significant places retained in the rounded off value should be the same as that of the specifiedvalue in this ) Thickness and mass is aligned with IS 1239 (Part 1) : ) All amendments have been 1161 : 19981 Indian StandardSTEEL TUBES FOR STRUCTURAL PURPOSES SPECIFICATION( Fourth Revision )1 SCOPEThis standard covers the requirements for hotfinished welded (HFW), hot finished seamless(HFS), and electric resistance welded (ERW) orhigh frequency induction welded (HFIW) plaincarbon STEEL TUBES for STRUCTURAL REFERENCESThe Indian Standards listed below are thenecessary adjuncts to this standard:3 TUBES covered by this standard shallbe designated by their nominal bore and shallbe classified as Light , Medium and Heavy depending on the wall thickness (see Table 1 ).

4 They shall be further graded as YSt 210, YSt240 and YSt 310 depending on the yield stressof the material (see Table 2 ). The designationof the STEEL TUBES shall, therefore, include thenominal bore of the tube, classification on wallthickness and grade of the SUPPLY OF requirements relating to thesupply of the STEEL TUBES for STRUCTURAL purposesshall conform to IS TUBES shall be manufactured throughone of the following processes as given inTable 3 and shall be supplied in conditions asshown therein:NOTE TUBES made by manual welding are notcovered by this DIMENSIONS AND standard sizes and mass of TUBES forstructural PURPOSES shall be as given in Table geometrical properties of the steeltubes are also given in Table 1 for of thickness lower than light TUBES ,specified in Table 1 shall not be TolerancesThe following tolerances shall apply:IS : 1983 Method of chemical analysisof STEEL (in various parts)1239(Part 1) : 1990 Mild STEEL TUBES , tubulars andother wrought STEEL fittings:Part 1 Mild STEEL TUBES (fifthrevision)1387 : 1993 General requirements for thesupply of metallurgicalmaterial (second revision)1608 : 1995 Mechanical testing of metals Tensile testing2328.

5 1983 Method for flattening test onmetallic TUBES (first revision)2329 : 1985 Method for bend test onmetallic TUBES (in full section)(first revision)4711 : 1974 Methods for sampling of steelpipes, TUBES and fittings (firstrevision)4736 : 1986 Hot-dip zinc coatings on mildsteel TUBES (first revision)4740 : 1979 Code of practice for packagingof STEEL TUBES (first revision)10748 : 1995 Hot-rolled STEEL strip for weldedtubes and pipes (first revision)a) Hot finished seamless (HFS)b) Cold finished seamless (CDS)c) Hot-finished welded (HFW); andd) Electric resistance welded or highfrequency induction welded (ERW orHFIW)a)Outside Diameter:+ mm1) Up to and including mm ) Over mm percentb)Thickness ( for all sizes ):+Not limited1) Welded TUBES 10 percent+Not limited2) Seamless TUBES percentc)Weight:+10 percent1) Single tube light 8 percentIS1161:19982 Table 1 Sizes and Properties of STEEL TUBES for STRUCTURAL PURPOSES (Clauses , , and )Nominal BoreOutside DiameterClassThicknessMassArea ofCrossSectionInternal VolumeSurfaceMomentofInertiaModulusofSec tionRadiusofGyrationSquare of Radius of GyrationExternalInternalmmmmmmkg/mcm2cm3 /mcm3/mcm3/mcm4cm3cmcm2(1)(2)(3)(4)(5)(6 )(7)(8)(9)(10)(11)(12)(13) IS 1161.

6 0043 7043 5913 4093 9303 8193 9903 5993 4104 2874 3894 0434 1424 0084 7884 7404 1284 9815 1874 6904 9215 7715 2874 4734 0304 8891 6065 7811 2606 0855 7431 9745 7121 4546 5781 9306 8836 5282 7346 5092 5077 6817 3073 5578 5788 2024 07310 1779 7757 53311 17310 66313 1161 : 19984 NOTE For 10 tonne lots, the weighment may be donein convenient smaller lots and added up at the option ofthe TUBES shall be cleanly finished andreasonably free from scale. They shall be freefrom cracks, surface flaws, laminations andother defects. The ends shall be cut cleanly andsquare with the axis of tube, unless imperfections such as handling marks,light die or roll marks, or shallow pits shall notbe considered as defects provided theimperfections are removable within minimumwall thickness permitted.

7 Removal of suchsurface imperfections is not required. Weldedtubing shall be free of protruding metal on theoutside surface of the weld the TUBES are required in galvanizedcondition the zinc coating on the TUBES shall beconforming to the requirements and tested asper methods, specified in IS otherwise agreed to between thepurchaser and the manufacturer, TUBES shallnot deviate from straightness by more than1 mm in any 600 mm length. 10 TUBES shall normally be supplied inrandom lengths at 4 to 7 m. If ordered in exactlengths, the tolerances shall be subject to prioragreement between the manufacturer and MECHANICAL following tests shall be carried out onthe selected tube, strip or plate.

8 For mechanicaltests, TUBES shall be sampled in accordancewith IS Tensile TestThe tensile strength, the yield stress and thepercentage elongation shall be determined inaccordance with the methods specified inIS 1608 and shall be not less than the valuesspecified for the relevant grades of TUBES givenin Table tensile test shall be made on:Medium 10 percentHeavy2) 10 tonne lots light 5 percentMedium percentHeavy a) a length cut from the end of the selectedtube (the ends of the length beingplugged for grips, where necessary); orb) a longitudinal strip cut from the tube, notincluding the weld, if any, and tested inthe curved condition, the choice restingwith the 2 Tensile Properties of STEEL TUBES for STRUCTURAL PURPOSES (Clauses and )GradeTensile Strength(Min)Yield Stress(Min)Elongation on Gauge MinMPaMPaPercentYSt 21033021020 YSt 24041024017 YSt 31045031014 NOTES11 MPa = 1N/mm2= percent for TUBES up to and including25 mm nominal bore for all grades shall be 12 3 STEEL and Supply Conditions(Clause )Sl turing ProcessSteelSupply Conditionsi)HFWIS 10748 Only YSt 210 orYSt 240ii)

9 HFS/CDSBars/ingots withsuitable chemicalcomposition as perIS 10748 to achievemechanical proper-ties for respectivegradesYSt 210, YSt 240or YSt 310iii)ERW/HFIW IS 10748 YSt 210, YSt 240or YSt 310 aswelded, heattreated or colddrawn andnormalizedNOTE If required the copper bearing STEEL may beused to impart weather resistant properties in the content shall be between to percentsubject to mutual agreement between the supplier andthe ,IS 1161 : Ductility Bend Test (Up to and Including50 mm NB)When tested in accordance with IS 2329 anunfilled length of tube shall be capable of beingbent cold by tube bending machine around agrooved former (with radius at bottom of thegroove equal to 6 O.

10 D. of the tube) through180 (with weld at 90 to the plane of bending)without showing any crack at the weld or Test ( TUBES Above 50 mm NB)Rings, not less than 40 mm in length cut fromthe ends of selected TUBES with edges roundedshall be flattened between parallel plates withthe weld, if any, at 90 (point of maximumbending) in accordance with IS 2328. Noopening shall occur by fracture in the weld untilthe distance between the plates is less than thevalue specified for each grade in col 4 of Table 4and no cracks or breaks in the metal elsewherethan in the weld shall occur until the distancebetween the plates is less than the valuespecified for each grade in col 5 of Table RetestShould any one of the test pieces first selectedfail to pass any of the tests specified, twofurther samples shall be selected for testing inrespect of each failure from the same lot.


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