1、Designation:A270/A270M15Standard Specification forSeamless and Welded Austenitic and Ferritic/AusteniticStainless Steel Sanitary Tubing1This standard is issued under the fixed designation A270/A270M;the number immediately following the designation indicates the yearof original adoption or,in the cas
2、e 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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This speci
3、fication covers grades of seamless,welded,and heavily cold worked welded austenitic and ferritic/austenitic stainless steel sanitary tubing intended for use in thedairy and food industry and having special surface finishes.Pharmaceutical quality may be requested,as a supplementaryrequirement.1.2 Thi
4、s specification covers tubes in sizes up to andincluding 12 in.300 mm in outside diameter.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independentl
5、y of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 Optional supplementary requirements are provided,andwhen one or more of these are desired,each shall be so statedin the order.2.Referenced Documents2.1 ASTM Standards:2A262 Practices for Detecting
6、Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA480/A480M Specification for General Requirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet,and StripA923 Test Methods for Detecting Detrimental IntermetallicPhase in Duplex Austenitic/Ferritic Stainless SteelsA9
7、67 Specification for Chemical Passivation Treatments forStainless Steel PartsA1016/A1016M Specification for General Requirements forFerritic Alloy Steel,Austenitic Alloy Steel,and StainlessSteel TubesE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)2.2 ASME Standard:B
8、46.1 Surface Texture(Surface Roughness,Waviness,andLay)32.3 ASME Boiler and Pressure Vessel Code:Section VIII Pressure Vessels32.4 Other Standard:SAE J1086 Practice for Numbering Metals and Alloys(UNS)43.Terminology3.1 Definitions:3.1.1 roughness average,Ra,narithmetic average surfaceroughness norma
9、lly reported in microinches or microns;ameasurement of surface roughness usually performed by mov-ing a stylus in a straight line along the surface,although othermethods may be used.4.Ordering Information4.1 It is the responsibility of the purchaser to specify allrequirements that are necessary for
10、material ordered under thisspecification.Such requirements may include,but are notlimited to,the following:4.1.1 Quantity(feet,metres,or number of lengths),4.1.2 Name of material(austenitic steel tube),4.1.3 Process seamless(SML),welded(WLD),or heavilycold worked(HCW),4.1.4 Size(outside diameter and
11、 average wall thickness),4.1.5 Length(specific or random),4.1.6 Surface finish(Section 13),4.1.7 Optional requirements(product analysis,see Section9;hydrostatic or nondestructive electric test,see Section 11).1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Stee
12、l and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved May 1,2015.Published June 2015.Originallyapproved in 1944.Last previous edition approved in 2014 as A270/A270M14.DOI:10.1520/A0270_A0270M-15.2For referen
13、ced 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.3Available from American Society of Mechanical Engineers(ASME),ASMEInternation
14、al Headquarters,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.4Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Dr
15、ive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1.8 Test report required(Certification Section of Specifi-cation A1016/A1016M),4.1.9 Specification designation,4.1.10 Special requirements,and4.2 Any supplementary requirements.5.General Requirements5.1 Material furnished under this sp
16、ecification shall con-form to the applicable requirements of the current edition ofSpecification A1016/A1016M,unless otherwise providedherein.6.Manufacture6.1 The tubes shall be manufactured by one of the followingprocesses:6.1.1 Seamless(SML)tubes shall be made by a process thatdoes not involve welding at any stage.6.1.2 Welded(WLD)tubes shall be made using an auto-mated welding process with no addition of filler metal duringthe welding process.6.1.3 Heavily cold worked(HCW)tubes shall be made
