1、Designation: A498 06A498/A498M 14Standard Specification forSeamless and Welded Carbon Steel Heat-Exchanger Tubeswith Integral Fins1This standard is issued under the fixed designationA498;A498/A498M; the number immediately following the designation indicates theyear of original adoption or, in the ca
2、se of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers external helical, integral finned, seamless or welded low-carbo
3、n steel tubes for use in tubular heatexchangers, surface condensers, evaporators, superheaters, and similar heat-transfer apparatus in unfinned end diameters up to 2in. (50.8 mm),50 mm, inclusive.1.2 UnitsThis specification is expressed in both inch-pound units and in SI units; however, unless the p
4、urchase order orcontract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in eitherinch-pound units or SI units are to be regarded separately as the standard. The values given in parentheses are for information only.standard. Within
5、 the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents;therefore, each system shall be used independently of the other. Combining values from the two systems may result innon-conformance with the standard.2. Referenced Documents2.1 ASTM Standards
6、:2A179/A179M Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser TubesA214/A214M Specification for Electric-Resistance-Welded Carbon Steel Heat-Exchanger and Condenser TubesA334/A334M Specification for Seamless and Welded Carbon and Alloy-Steel Tubes for Low-Temperatu
7、re Service3. Ordering Information3.1 The purchaser shall specify in the order the plain-tube specification and the alloy from which the finned tube is to bemanufactured.3.2 The purchaser shall specify in the order the diameter, wall thickness, and length of unfinned sections; root diameter and wallt
8、hickness of the finned section; number of fins per unit length; and the total tube length.4. Material and Manufacture4.1 The finned tubes shall be manufactured from plain tubes that conform to one of the following Specifications: A179/A179M,A214/A214M, or A334/A334M.4.2 Any tests that are required i
9、n the plain-tube specifications that are performed on unfinned lengths of tube in accordance withthis specification need not be performed on the plain tube.4.3 The fins shall be produced by the cold forming of steel prime-surface tube. To comply with this specification, the fin andtube material must
10、 be homogeneous.4.4 Finned tubes shall normally be furnished with unfinned ends, but may be furnished with finned ends if specified.5. Heat Treatment5.1 The tube after finning shall be supplied in either the annealed or as-fabricated condition, one of which shall be specifiedon the purchaser order.1
11、 This specification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.09on Carbon Steel Tubular Products.Current edition approved Oct. 1, 2006May 1, 2014. Published October 2006May 2014. Originally approved
12、 in 1963. Last previous edition approved in 20042006 asA498 04.A498 06. DOI: 10.1520/A0498-06.10.1520/A0498_A0498M-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to
13、 the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes
14、 accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr H
15、arbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2 The annealed condition is defined as having both the finned and unfinned portions of the tube conforming to the applicableheat-treatment requirements of the governing ASTM specification for the steel tube analysis involved
16、.5.3 The as-fabricated condition is defined as having the finned portions of the tube in the as-finned or cold-worked conditionproduced by the finning operation and the unfinned or plain tube portions of the finned tube in the as-fabricated condition suitablefor rolling-in operations.6. Chemical Com
17、position6.1 The steel shall conform to the chemical requirements prescribed in the governing plain-tube specification.7. Tensile Requirements7.1 The tube prior to the finning operation, or unfinned portions of the finned tube, shall conform to the requirements for tensileproperties prescribed in the
18、 governing plain-tube specification.8. Pressure Test8.1 Each tube after finning shall be subjected to an internal air pressure of 250 psi (1.72 MPa)1.7 MPa minimum for 5 swithout showing evidence of leakage.Any evidence of leakage shall be cause for rejection. The test method used shall permit easyv
19、isual detection of any leakage, such as testing the tube under water or by the pressure differential method.39. Dimensions and Permissible Variations9.1 DiameterThe outside diameter of the unfinned sections shall not exceed the diameter tolerances as specified in thegoverning prime-surface tube spec
20、ification (see Fig. 1).9.2 Wall ThicknessNo tube at its thinnest point beneath the fins or in the plain section shall be less than the minimum thicknessspecified.9.3 LengthThe length of the tubes shall not be less than that specified when measured at a temperature of 68 F (20 C),(20C, but may exceed
21、 the specified value by the amounts given in Table 1.10. Workmanship and Finish10.1 Finished tubes shall be reasonably straight and have smooth ends free from burrs. They shall be free from injurious defectsand shall have a workmanlike finish. A slight amount of oxidation will not be considered as s
22、cale.3 The pressure differential method is described in ASTM Material Research Standards, ASTM, Vol 1, No. 7, July 1961.NOTE 1The diameter over the fins will not normally exceed the diameter of the unfinned section.FIG. 1 Finned Tube NomenclatureTABLE 1 Tolerances for Specified Length of TubesSpecif
23、ied Length, ft (m) Tolerance, in. (mm)Up to 24 (7.3), incl +18 (3.2)Over 24 to 34 (7.3 to 10.4), incl +14 (6.4)Over 34 to 44 (10.4 to 13.4), incl +38 (9.5)Over 44 (13.4) +12 (12.7) maxTABLE 1 Tolerances for Specified Length of TubesSpecified Length, ft m Tolerance, in. mmUp to 24 7.3, incl +18 3Over
24、 24 to 34 7.3 to 10.4, incl +14 6Over 34 to 44 10.4 to 13.4, incl +38 9Over 44 13.4 +12 13 maxA498/A498M 14211. Package Marking11.1 The name or brand of the manufacturer, name and order number of the purchaser, plain tube specification, condition(annealed or as-fabricated), Specification A498A498/A4
25、98M tube diameter, wall thickness, and tube length shall be marked on atag securely attached to the bundle or box in which the tubes are shipped. The marking need not include the year of issue of thespecification.11.2 Bar CodingIn addition to the requirements stated in 11.1, bar coding is acceptable
26、 as a supplementary identificationmethod. Bar coding should be consistent with the Automotive Industry Action Group (AIAG) standard prepared by the PrimaryMetals Subcommittee of the AIAG Bar Code Project Team.12. Inspection12.1 The inspector representing the purchaser shall have entry, at all times
27、while work on the contract of the purchaser is beingperformed, to all parts of the manufacturers works that concern the manufacture of the material ordered. The manufacturer shallafford the inspector all reasonable facilities to satisfy him that the material is being furnished in accordance with thi
28、s specification.All required tests and inspections shall be made at the place of manufacture prior to shipment, unless otherwise specified, and shallbe conducted so as not to interfere unnecessarily with the operation of the works.12.2 CertificationWhen specified in the purchase order or contract, t
29、he manufacturer shall furnish a dated report certifyingthat the material was manufactured, sampled, tested, and inspected in accordance with the requirements of this specification,including the year of issue of the specification.13. Rejection13.1 Any rejection based on tests made in accordance with
30、this specification, and those allowed by the governing plain-tubespecification, shall be reported to the manufacturer. Disposition of rejected tubing shall be a matter of agreement between themanufacturer and the purchaser.13.2 Material that fails in the process of installation shall be set aside an
31、d the manufacturer notified for mutual evaluation ofsuitability of the material. Disposition of such material shall be a matter for agreement.14. Keywords14.1 carbon steel tube; heat exchanger tube; seamless steel tube; steel tube; welded steel tubeSUMMARY OF CHANGESCommittee A01 has identified the
32、location of selected changes to this specification since the last issue,A498 04A498 06, that may impact the use of this specification. (Approved May 1, 2014October 1, 2006)(1) Added SpecificationRevised the A334/A334M to paragraphstandard as a 4.1.dual units specification.ASTM International takes no
33、 position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own respons
34、ibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to
35、 ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, 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 addr
36、ess 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A498/A498M 143
