1、Designation:A 714 99(Reapproved 2009)1Standard Specification forHigh-Strength Low-Alloy Welded and Seamless Steel Pipe1This standard is issued under the fixed designation A 714;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year
2、 of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEThe units statement in 1.6 was revised editorially in April 2009.1.Scope1.1 This specification covers seamless and welded hig
3、h-strength low-alloy steel pipe NPS12to NPS 26,inclusive.Pipehaving other dimensions may be furnished provided such pipecomplies with all other requirements of this specification.Thismaterial is intended for pressure piping service,and othergeneral purposes,where savings in weight or added durabilit
4、yare important.NOTE1The dimensionless designator NPS(nominal pipe size)hasbeen substituted in this standard for such traditional terms as“nominaldiameter,”“size,”and“nominal size.”NOTE2A comprehensive listing of standardized pipe dimensions iscontained in ANSI Standard B36.10.1.2 ClassThese high-str
5、ength low-alloy steels have en-hanced resistance to general atmospheric corrosion by weath-ering as commonly encountered in rural,urban,marine,andindustrial environments.They are supplied in two classes:Class 2,having corrosion resistance equivalent to that ofcarbon steel with copper(0.20 minimum Cu
6、);and Class 4,having corrosion resistance substantially better than that ofClass 2(Note 3).Class 4 steels when properly exposed to theatmosphere can be used bare(unpainted)for many applica-tions.NOTE3For methods of estimating the atmospheric corrosion resis-tance of low alloy steels see Guide G 101
7、or actual data.1.3 TypePipe may be furnished in the following types ofmanufacturing processes:Type FFurnace-butt welded,continuous welded,Type EElectric-resistance welded,andType SSeamless.1.3.1 Pipe ordered under this specification is suitable forwelding.1.3.2 Type E pipe may be furnished either no
8、nexpanded orcold-expanded at the option of the manufacturer.1.3.3 Types F,E,and S pipe are commonly furnished innonheat-treated condition.Type S pipe may be furnished innormalized(or other)heat-treated condition,when so specified.1.3.4 Types F,E,and S pipe in single random lengths maybe furnished wi
9、th hot-dipped galvanized coating of zinc,subject to inquiry to the producer.1.3.5 Couplings,when furnished,shall be of the same class,heat-treated condition,and grade of material as the pipeordered.1.4 GradeThis specification designates eight grades ofsteel composition as listed in Table 1 and corre
10、sponding tensilerequirements for the grades as listed in Table 2.1.4.1 For Class 2 pipe,Grade I,II,or III shall be specified,and copper-bearing steel is required as specified in Table 1.1.4.2 For Class 4 pipe,Grade IV,V,VI,VII,or VIII shall bespecified.Alternatively,for Class 4,Type S,and Type E pip
11、e,a steel composition corresponding to a grade listed in Table 1of Specification A 588/A 588M may be specified,subject tonegotiation.1.5 When Class 4 pipe is joined by welding or is used inwelded construction,the user is cautioned that the selection ofwelding procedure and resultant composition of f
12、used metalshould be suitable for Class 4 material and the intendedservice.1.6 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced
13、 Documents2.1 ASTM Standards:2A 53/A 53M Specification for Pipe,Steel,Black and Hot-Dipped,Zinc-Coated,Welded and SeamlessA 90/A 90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA 370 Test Methods and Definitions for Mechanical Testingof Steel Prod
14、ucts1This 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 April 1,2009.Published September 2009.Originallyapproved in 1975.Last p
15、revious edition approved in 2001 as A 714 01.2For 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 page onthe ASTM website.1Copyright ASTM Inter
16、national,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.A 588/A 588M Specification for High-Strength Low-AlloyStructural Steel,up to 50 ksi 345 MPa Minimum YieldPoint,with Atmospheric Corrosion ResistanceA 700 Practices for Packaging,Marking,and LoadingMethods for Steel Products for ShipmentA 751 Test Methods,Practices,and Terminology forChemical Analysis of Steel ProductsB 6 Specification for ZincG 101 Guide for Estimating the Atmospheric CorrosionResistance of