1、Designation: A 498 06Standard Specification forSeamless and Welded Carbon Steel Heat-Exchanger Tubeswith Integral Fins1This standard is issued under the fixed designation A 498; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
2、ear 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.1. Scope*1.1 This specification covers external helical, integralfinned, seamless or welded low-carbon steel tubes for use
3、 intubular heat exchangers, surface condensers, evaporators, su-perheaters, and similar heat-transfer apparatus in unfinned enddiameters up to 2 in. (50.8 mm), inclusive.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation on
4、ly.2. Referenced Documents2.1 ASTM Standards:2A 179/A 179M Specification for Seamless Cold-DrawnLow-Carbon Steel Heat-Exchanger and Condenser TubesA 214/A 214M Specification for Electric-Resistance-Welded Carbon Steel Heat-Exchanger and CondenserTubesA 334/A 334M Specification for Seamless and Welde
5、d Car-bon and Alloy-Steel Tubes for Low-Temperature Service3. Ordering Information3.1 The purchaser shall specify in the order the plain-tubespecification 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 lengt
6、h of unfinned sections; root diameterand wall thickness of the finned section; number of fins per unitlength; and the total tube length.4. Material and Manufacture4.1 The finned tubes shall be manufactured from plain tubesthat conform to one of the following Specifications: A 179/A 179M, A 214/A 214
7、M,orA 334/A 334M.4.2 Any tests that are required in the plain-tube specifica-tions that are performed on unfinned lengths of tube inaccordance with this specification need not be performed onthe plain tube.4.3 The fins shall be produced by the cold forming of steelprime-surface tube. To comply with
8、this specification, the finand tube material must be homogeneous.4.4 Finned tubes shall normally be furnished with unfinnedends, but may be furnished with finned ends if specified.5. Heat Treatment5.1 The tube after finning shall be supplied in either theannealed or as-fabricated condition, one of w
9、hich shall bespecified on the purchaser order.5.2 The annealed condition is defined as having both thefinned and unfinned portions of the tube conforming to theapplicable heat-treatment requirements of the governingASTM specification for the steel tube analysis involved.5.3 The as-fabricated conditi
10、on is defined as having thefinned portions of the tube in the as-finned or cold-workedcondition produced by the finning operation and the unfinnedor plain tube portions of the finned tube in the as-fabricatedcondition suitable for rolling-in operations.6. Chemical Composition6.1 The steel shall conf
11、orm to the chemical requirementsprescribed in the governing plain-tube specification.7. Tensile Requirements7.1 The tube prior to the finning operation, or unfinnedportions of the finned tube, shall conform to the requirementsfor tensile properties prescribed in the governing plain-tubespecification
12、.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 Products.Current edition approved Oct. 1, 2006. Published October 2006. Originallyapproved in 1963. Last pr
13、evious edition approved in 2004 as A 498 04.2For 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.1*A Summary of Ch
14、anges 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.8. Pressure Test8.1 Each tube after finning shall be subjected to an internalair pressure of 250 psi (1.72 MPa) minimum for 5 s withouts
15、howing evidence of leakage. Any evidence of leakage shall because for rejection. The test method used shall permit easyvisual detection of any leakage, such as testing the tube underwater or by the pressure differential method.39. Dimensions and Permissible Variations9.1 DiameterThe outside diameter
16、 of the unfinned sec-tions shall not exceed the diameter tolerances as specified inthe governing prime-surface tube specification (see Fig. 1).9.2 Wall ThicknessNo tube at its thinnest point beneaththe fins or in the plain section shall be less than the minimumthickness specified.9.3 LengthThe lengt
17、h of the tubes shall not be less thanthat specified when measured at a temperature of 68 F (20 C),but may exceed the specified value by the amounts given inTable 1.10. Workmanship and Finish10.1 Finished tubes shall be reasonably straight and havesmooth ends free from burrs. They shall be free from
18、injuriousdefects and shall have a workmanlike finish.Aslight amount ofoxidation will not be considered as scale.11. Package Marking11.1 The name or brand of the manufacturer, name andorder number of the purchaser, plain tube specification, condi-tion (annealed or as-fabricated), Specification A 498
19、tubediameter, wall thickness, and tube length shall be marked on atag securely attached to the bundle or box in which the tubesare shipped. The marking need not include the year of issue ofthe specification.11.2 Bar CodingIn addition to the requirements stated in11.1, bar coding is acceptable as a s
20、upplementary identificationmethod. Bar coding should be consistent with the AutomotiveIndustry Action Group (AIAG) standard prepared by thePrimary Metals Subcommittee of the AIAG Bar Code ProjectTeam.12. Inspection12.1 The inspector representing the purchaser shall haveentry, at all times while work
21、 on the contract of the purchaseris being performed, to all parts of the manufacturers worksthat concern the manufacture of the material ordered. Themanufacturer shall afford the inspector all reasonable facilitiesto satisfy him that the material is being furnished in accordancewith this specificati
22、on. All required tests and inspections shallbe made at the place of manufacture prior to shipment, unlessotherwise specified, and shall be conducted so as not tointerfere unnecessarily with the operation of the works.12.2 CertificationWhen specified in the purchase order orcontract, the manufacturer
23、 shall furnish a dated report certify-ing that the material was manufactured, sampled, tested, andinspected in accordance with the requirements of this specifi-cation, including the year of issue of the specification.13. Rejection13.1 Any rejection based on tests made in accordance withthis specific
24、ation, and those allowed by the governing plain-tube specification, shall be reported to the manufacturer.Disposition of rejected tubing shall be a matter of agreementbetween the manufacturer and the purchaser.13.2 Material that fails in the process of installation shall beset aside and the manufact
25、urer notified for mutual evaluation ofsuitability of the material. Disposition of such material shall bea matter for agreement.14. Keywords14.1 carbon steel tube; heat exchanger tube; seamless steeltube; steel tube; welded steel tube3The pressure differential method is described in ASTM Material Res
26、earchStandards, ASTM, Vol 1, No. 7, July 1961.NOTE 1The diameter over the fins will not normally exceed thediameter of the unfinned section.FIG. 1 Finned Tube NomenclatureTABLE 1 Tolerances for Specified Length of TubesSpecified Length, ft (m) Tolerance, in. (mm)Up to 24 (7.3), incl +18 (3.2)Over 24
27、 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) maxA498062SUMMARY OF CHANGESCommittee A01 has identified the location of selected changes to this specification since the last issue,A 498 04, that may impact the use of this specification. (App
28、roved October 1, 2006)(1) Added Specification A 334/A 334M to paragraph 4.1.ASTM International takes no 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 validit
29、y 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 andif not revised, either reapproved or withdrawn. Your comment
30、s 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, which you may attend. If you feel that your comments have not
31、 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).A498063
