1、Designation:A381/A381M18Standard Specification forMetal-Arc-Welded Carbon or High-Strength Low-Alloy SteelPipe for Use With High-Pressure Transmission Systems1This standard is issued under the fixed designation A381/A381M;the number immediately following the designation indicates the yearof original
2、 adoption or,in the case of revision,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 straight seam,double-submerged-arc-welded carb
3、on or high-strength low-alloy steelpipe(Note 1)suitable for high-pressure service,16 in.400mm and larger in outside diameter,with wall thicknesses from516to 112in.8 to 40 mm.The pipe is intended for fabricationof fittings and accessories for compressor or pump-stationpiping.Pipe ordered to this spec
4、ification shall be suitable forbending,flanging,corrugating,and similar operations.NOTE1A comprehensive listing of standardized pipe dimensions iscontained in ANSI B36.10.NOTE2The term“double welded”is commonly used in the gas andoil transmission industry,for which this pipe is primarily intended,to
5、indicate welding with at least two weld passes,of which one is on theoutside of the pipe and one on the inside.For some sizes of the pipecovered by this specification,it becomes expedient to use manual welding,in which case the provisions of Note 3 shall be followed.1.2 This specification is express
6、ed in both inch-pound unitsand in SI units;however,unless the purchase order or contractspecifies the applicable M specification designation(SI units),the applicable inch-pound units shall apply.The values statedin either inch-pound units or SI units are to be regardedseparately as standard.Within t
7、he text,the SI units are shownin brackets.The values stated in each system may not be exactequivalents;therefore,each system shall be used independentlyof the other.Combining values from the two systems mayresult in nonconformance with the standard.1.3 Eleven classes of pipe,based on minimum yield p
8、ointrequirements,are covered as indicated in Table 1.1.4 This specification identifies various thermal treatments(3.1.9,5.5,and 5.6).1.5 The following caveat applies to the test methodsportion,Sections 9,10,and 11,only.This standard does notpurport to address all of the safety concerns,if any,associ
9、atedwith its use.It is the responsibility of the user of this standardto establish appropriate safety,health,and environmentalpractices and determine the applicability of regulatory limita-tions prior to use.1.6 This international standard was developed in accor-dance with internationally recognized
10、 principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definiti
11、ons for Mechanical Testingof Steel ProductsA530/A530M Specification for General Requirements forSpecialized Carbon and Alloy Steel PipeA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsA1058 Test Methods for Mechanical Testing of SteelProductsMetric2.2 ASME Boiler a
12、nd Pressure Vessel Code:3Section VIIISection IX2.3 ASME Standard:4ASME B36.10 Welded and Seamless Wrought Steel Pipe3.Ordering Information3.1 Orders for metal-arc-welded steel pipe to this specifica-tion should include the following,as required,to describe thedesired material adequately:3.1.1 Quanti
13、ty(feet,centimetres,or number of lengths),3.1.2 Name of material(metal-arc welded pipe),3.1.3 Class(Table 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
14、Products.Current edition approved Nov.1,2018.Published December 2018.Originallyapproved in 1954.Last previous edition approved in 2012 as A381 96(2012).DOI:10.1520/A0381_A0381M-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.Fo
15、r Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers,345 E.47th St.,New York,NY 10017.4Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Tw
16、o Park Ave.,New York,NY 10016-5990,http:/www.asme.org.*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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization T
