1、Designation: A 179/A 179M 90a (Reapproved 2005)Used in USNRC-RDT StandardsStandard Specification forSeamless Cold-Drawn Low-Carbon Steel Heat-Exchangerand Condenser Tubes1This standard is issued under the fixed designation A 179/A 179M; the number immediately following the designation indicates the
2、yearof 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification2covers minimum-wall-thickness,se
3、amless 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 s
4、pecification 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
5、 units 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”designatio
6、n of this specification is specified in the order.2. Referenced Documents2.1 ASTM Standards:3A 450/A 450M Specification for General Requirements forCarbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes3. Ordering Information3.1 Orders for material under this specification shouldinclude the follow
7、ing, as required, to describe 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 requiremen
8、ts (product analysis, Section 9,flange test, 11.3),3.1.7 Test report required (Certification Section of Specifi-cation A 450/A 450M),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 requi
9、rements of the current edition ofSpecification A 450/A 450M, unless otherwise providedherein.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.
10、 Surface Condition7.1 Finished tubes 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, m
11、ax, % 0.0358.2 Supplying an alloy 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 iden
12、tified by heat, one tube per heat shall be1This 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 Oct. 1, 2005. Published October
13、2005. Originallyapproved in 1935. Last previous edition approved in 2001 as A 179/A 179M 90a(2001).2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-179 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM
14、Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.analyzed. The chemical composit
15、ion thus determined shallconform to the requirements specified.9.2 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 t
17、ubes 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 fr
18、om 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 an
21、d 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 add
22、ition to the marking prescribed in SpecificationA 450/A 450M, 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 tensil
23、e properties 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 st
24、andard 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 a
25、ndif 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,
26、 which 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,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).A 179/A 179M 90a (2005)2
