1、Designation: A179/A179M 90a (Reapproved 2012) Used in USNRC-RDT StandardsStandard Specification forSeamless Cold-Drawn Low-Carbon Steel Heat-Exchangerand Condenser Tubes1This standard is issued under the fixed designation A179/A179M; the number immediately following the designation indicates the yea
2、rof original 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. Scope1.1 This specification2covers minimum-wall-thickness,seamle
3、ss cold-drawn low-carbon steel tubes for tubular heatexchangers, condensers, and similar heat transfer apparatus.1.2 This specification covers tubes18 to 3 in. 3.2 to 76.2mm, inclusive, in outside diameter.NOTE 1Tubing smaller in outside diameter and having a thinner wallthan indicated in this speci
4、fication is available. Mechanical propertyrequirements do not apply to tubing smaller than18 in. 3.2 mm inoutside diameter or with a wall thickness under 0.015 in. 0.4 mm.1.3 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI uni
5、ts are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation. The inch-pound units shall apply unless the “M”designation of
6、 this specification is specified in the order.2. Referenced Documents2.1 ASTM Standards:3A450/A450M Specification for General Requirements forCarbon and Low Alloy Steel Tubes3. Ordering Information3.1 Orders for material under this specification shouldinclude the following, as required, to describe
7、the desiredmaterial adequately:3.1.1 Quantity (feet, metres, or number of lengths),3.1.2 Name of material (seamless tubes),3.1.3 Manufacture (cold-drawn),3.1.4 Size (outside diameter and minimum wall thickness),3.1.5 Length (specific or random),3.1.6 Optional requirements (product analysis, Section
8、9,flange test, 11.3),3.1.7 Test report required (Certification Section of Specifi-cation A450/A450M),3.1.8 Specification number, and3.1.9 Special requirements.4. General Requirements4.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition o
9、fSpecification A450/A450M, unless otherwise provided herein.5. Manufacture5.1 Tubes shall be made by the seamless process and shallbe cold drawn.6. Heat Treatment6.1 Tubes shall be heat treated after the final cold draw passat a temperature of 1200F 650C or higher.7. Surface Condition7.1 Finished tu
10、bes shall be free of scale. A slight amount ofoxidation will not be considered as scale.8. Chemical Composition8.1 The steel shall conform to the following requirements asto chemical composition:Carbon, % 0.060.18Manganese, % 0.270.63Phosphorus, max, % 0.035Sulfur, max, % 0.0358.2 Supplying an alloy
11、 grade that specifically requires theaddition of any element other than those listed in 8.1 is notpermitted.9. Product Analysis9.1 When requested on the purchase order, a product analy-sis shall be made by the supplier from 1 tube per 250 pieces orwhen tubes are identified by heat, one tube per heat
12、 shall beanalyzed. The chemical composition thus determined shallconform to the requirements specified.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 Produc
13、ts.Current edition approved March 1, 2012. Published November 2012. Originallyapproved in 1935. Last previous edition approved in 2005 as A179/A179M 90a(2005). DOI: 10.1520/A0179_A0179M-90AR12.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-179 in Section II of t
14、hat Code.3For 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.Copyright ASTM International, 100 Barr Harbor Drive,
15、 PO Box C700, West Conshohocken, PA 19428-2959. United States19.2 If the original test for product analysis fails, retests oftwo additional billets or tubes shall be made. Both retests, forthe elements in question, shall meet the requirements of thespecification; otherwise all remaining material in
16、the heat or lot(Note 2) shall be rejected or, at the option of the producer, eachbillet or tube may be individually tested for acceptance. Billetsor tubes which do not meet the requirements of the specifica-tion shall be rejected.NOTE 2A lot consists of 250 tubes.10. Hardness Requirements10.1 The tu
17、bes shall have a hardness number not exceeding72 HRB.11. Mechanical Tests Required11.1 Flattening TestOne flattening test shall be made onspecimens from each of two tubes from each lot (Note 2)orfraction thereof.11.2 Flaring TestOne flaring test shall be made on speci-mens from each of two tubes fro
18、m each lot (Note 2) or fractionthereof.11.3 Flange TestWhen specified as a substitute for theflaring test, for tubes having a wall thickness (actual meanwall) less than 10 % of the outside diameter, one test shall bemade on specimens from each of two tubes from each lot (Note2) or fraction thereof.
19、For tubes other than specified above, theflange test shall not be required.11.4 Hardness TestRockwell hardness tests shall be madeon specimens from two tubes from each lot. The term lotapplies to all tubes, prior to cutting, of the same nominaldiameter and wall thickness which are produced from the
20、sameheat of steel. When final heat treatment is in a batch-typefurnace, a lot shall include only those tubes of the same sizeand the same heat which are heat treated in the same furnacecharge. When the final heat treatment is in a continuousfurnace, a lot shall include all tubes of the same size and
21、 heat,heat treated in the same furnace at the same temperature, timeat heat, and furnace speed.11.5 Hydrostatic TestEach tube shall be subjected to thehydrostatic test, or, instead of this test, a nondestructive electrictest may be used when specified by the purchaser.12. Product Marking12.1 In addi
22、tion to the marking prescribed in SpecificationA450/A450M, the marking shall include the name and ordernumber of the purchaser.13. Keywords13.1 cold drawn tube; condenser tubes; heat exchangertubes; low carbon steel; seamless tubeEXPLANATORY NOTESNOTE 1For purposes of design, the following tensile p
23、roperties maybe assumed:Tensile strength, min, ksi MPa 47 325Yield strength, min, ksi MPa 26 180Elongation in 2 in. or 50 mm, min, % 35ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this stand
24、ard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andi
25、f not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, wh
26、ich you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,
27、United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A179/A179M 90a (2012)2
