1、Designation: A 270 03aStandard Specification forSeamless and Welded Austenitic and Ferritic/AusteniticStainless Steel Sanitary Tubing1This standard is issued under the fixed designation A 270; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specific
3、ation 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 This
4、 specification covers tubes in sizes up to andincluding 12 in. (304.8 mm) in outside diameter.1.3 The values stated in inch-pound units are to be regardedas the standard.1.4 Optional supplementary requirements are provided, andwhen one or more of these are desired, each shall be so statedin the orde
5、r.2. Referenced Documents2.1 ASTM Standards:2A 262 Practices for Detecting Susceptibility to Intergranu-lar Attack in Austenitic Stainless SteelsA 480/A 480M Specification for General Requirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet, and StripA 923 Test Methods for Detectin
6、g Detrimental IntermetallicPhase in Wrought Duplex Austenitic/Ferritic StainlessSteelsA 967 Specification for Chemical Passivation Treatmentsfor Stainless Steel PartsA 1016/A 1016M Specification for General Requirementsfor Ferritic Alloy Steel, Austenitic Alloy Steel, and Stain-less Steel TubesE 527
7、 Practice for Numbering Metals and Alloys (UNS)2.2 ASME Standard:B46.1 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 Definition:
8、3.1.1 roughness average, Ra, narithmetic average surfaceroughness normally 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 responsi
9、bility of the purchaser to specify allrequirements that are necessary for 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 sea
10、mless (SML), welded (WLD), or heavilycold worked (HCW),4.1.4 Size (outside diameter and 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 Section11)
11、.4.1.8 Test report required (Certification Section of Specifi-cation A 1016/A 1016M),4.1.9 Specification designation,4.1.10 Special requirements, and1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys, and is the direct responsibility of Su
12、bcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved Dec. 1, 2003. Published January 2004. Originallyapproved in 1944. Last previous edition approved in 2003 as A 27003.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Se
13、rvice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from ASME International, Three Park Avenue, New York, NY100165990.4Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warr
14、endale, PA 15096-0001.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.2 Any supplementary requirements.5. General Requirements5.1 Material furnished under this speci
15、fication shall con-form to the applicable requirements of the current edition ofSpecification A 1016/A 1016M, 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
16、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 byapplying cold working of not less than 35 % reduction ofthickness of both wall and weld to
17、a welded tube prior to thefinal anneal. No filler shall be used in making the weld. Priorto cold working, the weld shall be 100 % radiographicallyinspected in accordance with the requirements ofASME Boilerand Pressure Vessel Code Section VIII, Division 1, latestrevision, Paragraph UW 51.6.2 At the m
18、anufacturers option, tubing may be furnishedeither hot finished or cold finished.7. Heat Treatment7.1 All material shall be furnished in the heat-treatedcondition. The heat treatment procedure, except for S31803,S32003, S32205, S32750, N08926 and N08367, shall consistof heating the material to a min
19、imum temperature of 1900F(1040C) and quenching in water or rapid cooling by othermeans.7.2 N08926 shall be heat-treated to a minimum temperatureof 2010F 1100C followed by quenching in water or rapidlycooling by other means. UNS N08367 should be solutionannealed from 2025F 1107C minimum followed by r
20、apidquenching.7.3 S31803 and S32205 shall be heat-treated in a tempera-ture range of 1870F 1020C to 2010F 1100C followedby quenching in water or rapidly cooling by other means.7.4 S32750 shall be heat-treated in a temperature range of1880F 1025C to 2060F 1125C followed by quenchingin water or rapidl
21、y cooling by other means.7.5 S32003 shall be heat-treated in a temperature range of1850F (1010C) to 2010F (1100C).8. Chemical Composition8.1 An analysis of either one length of flat-rolled stock orone tube shall be made for each heat. The chemical composi-tion thus determined shall conform to the re
22、quirements given inTable 1.9. Product Analysis9.1 When requested by the purchaser, product analysistolerance in Specification A 480/A 480M shall apply. Theproduct analysis tolerance is not applicable to the carboncontent for material with a specified maximum carbon of0.04 % or less.9.2 If the origin
23、al test for product analysis fails, retests oftwo additional lengths of flat-rolled stock or tubes shall bemade. Both retests for the elements in question shall meet therequirements of the specification; otherwise all remainingmaterial in the heat or lot (Note 1) shall be rejected or, at theoption o
24、f the producer, each length of flat-rolled stock or tubemay be individually tested for acceptance. Lengths of flatrolled stock or tubes that do not meet the requirements of thespecification shall be rejected.10. Mechanical Tests Required10.1 Reverse Flattening TestFor welded tubes, one re-verse flat
25、tening test shall be made on a specimen from each1500 ft (457 m) of finished tubing.11. Hydrostatic or Nondestructive Electric Test11.1 Each tube shall be subjected to the nondestructiveelectric test or the hydrostatic test. The type of test to be usedshall be at the option of the manufacturer, unle
26、ss otherwisespecified in the purchase order.12. Permissible Variations in Dimensions12.1 The following variations in dimensions shall apply:12.1.1 For tubes with a specified wall thickness of 0.049 in.(1.24 mm) and greater, variations in outside diameter fromthose specified shall not exceed the amou
27、nt prescribed in Table2. For tubes with a specified wall thickness less than 0.049 in.(1.24 mm), the diameter tolerances shall be a matter foragreement by the manufacturer and the purchaser.12.1.2 When tubing 4 in. (101.6 mm) outside diameter isordered, additional ovality may be required for thin wa
28、lltubing. Thin wall tubing applies when the specified wall is lessthan 0.150 in. (3.81 mm). When thin wall tubing is ordered, themaximum and minimum outside diameter at any cross sectionshall deviate from the specified outside diameter by no morethan twice the permissible variation in outside diamet
29、er givenin Table 2; however, the mean diameter at that cross sectionmust still be within the given permissible variation.12.1.3 The wall thickness at any point shall not vary morethan 12.5 %, from the specified wall thickness.12.1.4 Variations in length shall meet the requirements inTable 2 except w
30、hen the Pharmaceutical Quality Tubing(Supplementary Requirement S2) is specified.13. Surface Finishes13.1 The following surface finishes may be specified:13.1.1 Mill FinishAfinish without additional polishing oroperations intended to smooth the surface.13.1.2 Mechanically Polished Surface FinishThe
31、pur-chaser may specify one of the following finish numbers for amechanically polished surface:13.1.2.1 Finish No. 80A ground finish produced by pol-ishing a tube with an abrasive media impregnated with No. 80grit.A 270 03a2TABLE1ChemicalRequirementsElementGradeTP304TP304L.TP316TP316L.2003UNSDesignat
32、ionAS30400S30403S31254S31600S31603N08926N08367S31803S32205S32750S32003Composition,%Carbon,max0.080.035B0.0200.080.035B0.0200.0300.0300.0300.0300.030maxManganese, max2.002.001.002.002.002.002.002.002.001.202.00maxPhosphorus, max0.0450.0450.0300.0450.0450.0300.0400.0300.0300.0350.030Sulfur,max0.0300.0
33、300.0100.0300.0300.0100.0300.0200.0200.0200.020maxSilicon,max1.001.000.801.001.000.501.001.001.000.801.00maxNickel8.011.08.012.017.518.510.014.010.014.024.026.023.525.54.56.54.56.56.08.03.04.0Chromium18.020.018.020.019.520.516.018.016.018.019.021.020.022.021.023.022.023.024.026.019.522.5Molybdenum.6
34、.06.52.003.002.003.006.07.06.07.02.53.53.03.53.05.01.52.0NitrogenC.0.180.22.0.150.250.180.250.080.200.140.200.240.320.140.20Copper.0.501.00.0.501.50.75max.0.50maxANewdesignationestablishedinaccordancewithPracticeE527andSAEJ1086.BForsmalldiameterorthinwallsorboth,wheremanydrawingpassesarerequired,aca
35、rbonmaximumof0.040%isnecessaryingradesTP304LandTP316L.Smalloutsidediametertubesaredefinedasthoselessthan0.500in.(12.7mm)inoutsidediameterandlightwalltubesasthoselessthan0.049in.(1.24mm)inaveragewallthickness(0.044in.(1.12mm)inminimumwallthickness).CThemethodofanalysisfornitrogenshallbeamatterofagree
36、mentbetweenthepurchaserandmanufacturer.A 270 03a313.1.2.2 Finish No. 120A ground finish produced bypolishing a tube with an abrasive media impregnated with No.120 grit.13.1.2.3 Finish No. 180A ground finish produced bypolishing a tube with an abrasive media impregnated with No.180 grit.13.1.2.4 Fini
37、sh No. 240A ground finish produced bypolishing a tube with an abrasive media impregnated with No.240 grit.13.1.2.5 Other mechanically polished finishes may beagreed upon between the purchaser and manufacturer.13.1.3 Electropolished FinishA bright reflective finishproduced by electropolishing. The ma
38、nufacturer may use otherpolishing operations prior to electropolishing.13.1.4 Maximum Roughness Average (Ra) Surface FinishThe customer may specify a maximum Ra on the insidesurface, outside surface, or both. The measurement of surfaceroughness shall be in accordance with ASME B46.1.13.1.4.1 When no
39、 agreement is made regarding Ra mea-surement of longitudinally polished tube, disputes shall beresolved using measurements made in accordance with ASMEB46.1.13.2 The manufacturer shall select a manufacturing methodto produce the specified finish. The operations may or may notinclude polishing.13.2.1
40、 The purchaser may specify the polishing type foreither the inside surface, outside surface or both for the finaldesired effect.13.2.1.1 Longitudinally Polished Finish It is usually per-formed on the inside surface only.13.2.1.2 Circumferential (Rotary) Polished FinishThiscan be performed on either
41、the inside surface, outside surface,or both.13.2.1.3 When the surface is finished by circumferentialmechanical polishing, the Ra measurement shall be measuredin the longitudinal direction. Roughness measurement of alongitudinal mechanical polished surface shall be a matter ofagreement between the ma
42、nufacturer and the purchaser.13.3 Acceptance criteria for minor surface imperfectionsshall be a matter for agreement by the manufacturer and thepurchaser.13.4 Combinations of the above finishes for internal andexternal surfaces may be specified. When tubes are polished onone surface only, the other
43、surface may be the regular millfinish.14. Product Marking14.1 In addition to the marking prescribed in SpecificationA 1016/A 1016M and specified in the order, the marking shallinclude whether the tubing is seamless (SML), welded (WLD),or heavily cold worked (HCW), and the surface finish.15. Packagin
44、g15.1 Unless otherwise specified in the order, all tubing shallbe protected for shipment by bundling, paper or burlapwrapping, or boxing at the discretion of the manufacturer.16. Keywords16.1 austenitic stainless steel; duplex stainless steel; ferritic/austenitic stainless steel; heavily cold worked
45、 tube; seamlesssteel tube; stainless steel tube; steel tube; welded steel tubeTABLE 2 Permissible Variations in DimensionsSize, OutsideDiameter,in. (mm)Permissible Variations in OutsideDiameter, in. (mm)Permissible Variations in CutLength, in. (mm)AOver Under Over Under1.000 (25.4) and under 0.005 (
46、0.13) 0.005 (0.13)18 (3.2) 0Over 1 (25.4) to 2 (50.8) 0.008 (0.20) 0.008 (0.20)18 (3.2) 0Over 2 (50.8) to 3 (76.2) 0.010 (0.25) 0.010 (0.25)18 (3.2) 0Over 3 (76.2) to 4 (101.6) 0.015 (0.38) 0.015 (0.38)18 (3.2) 0Over 4 (101.6) to 512 (139.7), excl 0.015 (0.38) 0.015 (0.38)316 (4.8) 0512 (139.7) to 8
47、 (203.2), excl 0.030 (0.76) 0.030 (0.76)316 (4.8) 08 (203.2) to 12 (304.8) 0.050 (1.27) 0.050 (1.27)316 (4.8) 0AThe cut tolerances do not apply to Pharmaceuitical Tubing in S2 (see paragraph S2.7).A 270 03a4SUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall apply only when spec
48、ified by the purchaser in theinquiry, contract, or order.S1. Intergranular Corrosion TestS1.1 When specified on the order, intergranular corrosiontests shall be performed by the manufacturer on specimensrepresentative of the as-shipped condition. Tubes shall becapable of passing corrosion tests in t
49、he as-shipped condition.Tests shall be performed in accordance with Practice E ofPractices A 262 for austenitic stainless alloys (intergranularcorrosion test) or Practice C of Test Methods A 923 for duplexalloys (S31803, S32205, or S32750, Intermetallic phase detec-tion).S2. Pharmaceutical Quality TubingS2.1 Chemistry:S2.1.1 When S31600 and S31603 are ordered, sulfur con-tent shall be restricted to the range of 0.005 to 0.017 %.S2.2 Tensile Require
