1、Designation:A 381 96(Reapproved 2001)An American National StandardStandard Specification forMetal-Arc-Welded Steel Pipe for Use With High-PressureTransmission Systems1This standard is issued under the fixed designation A 381;the number immediately following the designation indicates the year oforigi
2、nal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers straight seam,double-submerged-arc-welded st
3、eel pipe(Note 1)suitable for high-pressure service,16 in.(406 mm)and larger in outsidediameter,with wall thicknesses from516to 112in.(7.9 to 38mm).The pipe is intended for fabrication of fittings andaccessories for compressor or pump-station piping.Pipe or-dered to this specification shall be suitab
4、le for bending,flanging(vastoning),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,toindicate weld
5、ing 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 Nine classes of pipe,based on minimum yiel
6、d pointrequirements,are covered as indicated in Table 1.1.3 The values stated in inch-pound units are to be regardedas the standard.The metric equivalents of inch-pound unitsmay be approximate.1.4 The following hazard caveat applies to the test methodsportion,Sections 9 and 10,only.This standard doe
7、s notpurport to address all of the safety concerns,if any,associatedwith its use.It is the responsibility of the user of this standardto establish appropriate safety and health practices anddetermine the applicability of regulatory limitations prior touse.2.Referenced Documents2.1 ASTM Standards:A 3
8、70 Test Methods and Definitions for Mechanical Testingof Steel Products2A 530/A 530M Specification for General Requirements forSpecialized Carbon and Alloy Steel Pipe3E 30 Test Methods for Chemical Analysis of Steel,CastIron,Open-Hearth Iron,and Wrought Iron42.2ASME Boiler and Pressure Vessel Code:S
9、ection VIII Pressure Vessels5Section IX Welding Qualifications52.3ANSI Standard:2ANSI B36.10 Welded and Seamless Wrought Steel Pipe3.Ordering Information3.1 Orders for material to this specification should includethe following,as required,to describe the desired materialadequately:3.1.1 Quantity(fee
10、t,centimetres,or number of lengths),3.1.2 Name of material(metal-arc welded pipe),3.1.3 Class(Table 1),3.1.4 Material(carbon or alloy steel,Section 5),3.1.5 Size(outside diameter and wall thickness),3.1.6 Length(specific or random)(Section 13),3.1.7 Ends(Section 14),3.1.8 Heat treatment(stress-relie
11、ved or normalized)(see5.6),3.1.9 Optional requirements(see 5.2(Note 3),Sections 11and 15),3.1.10 Specification number,and3.1.11 Special requirements or exceptions to this specifica-tion.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel,and RelatedAlloys,and
12、 is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved Sept.10,1996.Published August 1997.Originallypublished as A 381 54 T.Last previous edition A 381 93.2Annual Book of ASTM Standards,Vol 01.03.3Annual Book of ASTM Standards,Vol 01.01.4Annual
13、Book of ASTM Standards,Vol 03.05.5Available from American Society of Mechanical Engineers,345 E.47th St.,New York,NY 10017.TABLE 1Tensile RequirementsClassYield Strength,min,psi(MPa)Tensile Strength,min,psi(MPa)Elongation in 2 in.(50.8 mm),min,%Y 3535 000(240)60 000(415)26Y 4242 000(290)60 000(415)2
14、5Y 4646 000(316)63 000(435)23Y 4848 000(330)62 000(430)21Y 5050 000(345)64 000(440)21Y 5252 000(360)66 000(455)20Y 5656 000(385)71 000(490)20Y 6060 000(415)75 000(515)20Y 6565 000(450)77 000(535)201Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United
15、States.4.General Requirements4.1 Material furnished to this specification shall conform tothe applicable requirements of the current edition of Specifi-cation A 530/A 530M,unless otherwise provided herein.5.Materials and Manufacture5.1 The steel plate used in the manufacture of the pipe shallbe of s
16、uitable welding quality carbon steel,or of suitablewelding quality high-strength,low-alloy steel,as agreed uponbetween the manufacturer and purchaser.5.2 The longitudinal edges of the plate shall be shaped togive the most satisfactory results by the particular weldingprocess employed.The plate shall be properly formed and maybe tacked preparatory to welding.The weld(except tack welds)shall be made preferably by the automatic submerged-arc-welding process(Note 3)and shall be of reasonably uniform
