1、Designation:A787/A787M15aStandard Specification forElectric-Resistance-Welded Metallic-Coated Carbon SteelMechanical Tubing1This standard is issued under the fixed designation A787/A787M;the number immediately following the designation indicates the yearof original adoption or,in the case of revisio
2、n,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers round,square,rectangular,andspecial shape,electric-resistance-welded mechanical t
3、ubing,either zinc-coated(galvanized)after welding or produced fromaluminum-coated,zinc-coated(galvanized),zinc-iron alloy-coated(galvannealed),55%aluminum-zinc alloy-coated,orzinc-aluminum-magnesium alloy-coated steel sheet.Tubing foruse as electrical conduit(EMT)or intermediate metallicconduit(IMC)
4、is not covered by this specification.1.2 This specification covers mechanical tubing with out-side diameters or maximum outside dimensions ranging from12to 15 in.12.7 to 380.0 mm and wall thickness from 0.028to 0.180 in.0.70 to 4.60 mm.1.3 Sizes outside the ranges listed above may be orderedprovided
5、 all other requirements of the specification are met.1.4 This specification is expressed in both inch-pound unitsand in SI units;however,unless the purchase order specifiesthe applicable M specification designation(SI units),theinch-pound units shall apply.The values stated in either SIunits or inch
6、-pound units are to be regarded separately asstandard.Within the text,the SI units are shown in brackets.The values stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in non-conformance wi
7、th the standard.2.Referenced Documents2.1 ASTM Standards:2A463/A463M Specification for Steel Sheet,Aluminum-Coated,by the Hot-Dip ProcessA653/A653M Specification for Steel Sheet,Zinc-Coated(Galvanized)or Zinc-Iron Alloy-Coated(Galvannealed)by the Hot-Dip ProcessA792/A792M SpecificationforSteelSheet,
8、55%Aluminum-Zinc Alloy-Coated by the Hot-Dip ProcessA924/A924M Specification for General Requirements forSteel Sheet,Metallic-Coated by the Hot-Dip ProcessA1046/A1046M Specification for Steel Sheet,Zinc-Aluminum-MagnesiumAlloy-Coated by the Hot-Dip Pro-cessB6 Specification for Zinc3.Classification3.
9、1The types of tubing covered by this specification are:TypeNumberCodeLettersDescription1AWACelectric-resistance-welded aluminum-coated carbon steel mechanical tubing2AWGelectric-resistance-welded galvanizedcarbon steel mechanical tubing3AWPGelectric-resistance-welded carbon steelmechanical tubing,po
10、st-hot dippedgalvanized4AWGAelectric-resistance-welded carbon steelmechanical tubing,zinc-iron alloy-coated(galvannealed)5AWGZelectric-resistance-welded carbon steelmechanical tubing,55%aluminum-zincalloy-coated6AWZAMelectric-resistance-welded carbon steelmechanical tubing,zinc-aluminum-magnesium al
11、loy-coated4.Ordering Information4.1The ordered wall thickness of the tubing shall be thetotal of the base metal and the metallic coating.4.2Orders for material under this specification shall in-clude the following:4.2.1Quantity(feet,metres,or number of lengths),4.2.2 Type,code letters,and descriptio
12、n(Sections 1 and 3),4.2.3 Applicable ASTM designation number(s),4.2.4Coating designation and type of coating,4.2.5Chemically treated or not chemically treated rawmaterial,4.2.6Oiled or dry(Section 16),4.2.7Extra smooth coating(if required),4.2.8Customer application,including fabrication,4.2.9Flash c
13、ondition(7.1),1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved Sept.1,2015.Published September 2015.Originallyapproved in 19
14、81.Last previous edition approved in 2015 as A787/A787M 15.DOI:10.1520/A0787_A0787M-15A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary pa
15、ge onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.2.10Steel grade designation(Sections 5 and 9),4.2.11 Report of chemical analysis if required(Sections
16、 10and 11),4.2.12Shape(round,square,rectangular,or special),4.2.12.1Dimensions:roundany two of the following:inside diameter,outside diameter,or wall thickness;square orrectangularoutside dimension,wall thickness,and cornerradii,if required.(See 12.1 and 13.1 and 13.2.)4.2.13Length:round tubingmill lengths or definite cutlengths(see 12.2);square and rectangular tubingmill cutlengths and specified length(see 13.4).4.2.14Squareness of cut:round tubing,if required(see12.3);square and rectangular tu
