1、Designation:B28018Standard Specification forSeamless Copper Tube for Air Conditioning andRefrigeration Field Service1This standard is issued under the fixed designation B280;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、 last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This specification establishes the r
3、equirements for seam-less copper tube intended for use in the connection,repairs,oralternations of air conditioning or refrigeration units in thefield.NOTE1Fittings used for soldered or brazed connections in airconditioning and refrigeration systems are described in ASME StandardB16.22.NOTE2The asse
4、mbly of copper tubular systems by soldering isdescribed in Practice B828.NOTE3Solders for joining copper tubular systems are described inSpecification B32.The requirements for acceptable fluxes for thesesystems are described in Specification B813.1.2 The tube shall be produced from the following cop
5、pers,and the manufacturer has the option to supply any one of them,unless otherwise specified:CopperUNS No.Previously UsedDesignationDescriptionC10200OFOxygen free withoutresidual deoxidantsC12000DLPPhosphorus deoxidized,low residual phosphorusC12200DHPPhosphorus deoxidized,high residual phosphorus1
6、.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 The following hazard statement pertains only to the testmethod described in 18.2.4
7、of this specification:This standarddoes not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety,health,and environ-mental practices and determine the applicability of regulatorylimitations p
8、rior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization Technical
9、Barriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2B32 Specification for Solder MetalB153 Test Method for Expansion(Pin Test)of Copper andCopper-Alloy Pipe and TubingB577 Test Methods for Detection of Cuprous Oxide(Hydro-gen Embrittlement Susceptibility)in CopperB601 Classific
10、ation for Temper Designations for Copper andCopper AlloysWrought and CastB813 Specification for Liquid and Paste Fluxes for Solder-ing of Copper and Copper Alloy TubeB828 Practice for Making Capillary Joints by Soldering ofCopper and Copper Alloy Tube and FittingsB900 Practice for Packaging of Coppe
11、r and Copper AlloyMill Products for U.S.Government AgenciesE3 Guide for Preparation of Metallographic SpecimensE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE53 Test Method for Determina
12、tion of Copper in UnalloyedCopper by GravimetryE62 Test Methods for Chemical Analysis of Copper andCopperAlloys(Photometric Methods)(Withdrawn 2010)3E112 Test Methods for Determining Average Grain SizeE243 Practice for Electromagnetic(Eddy Current)Examina-tion of Copper and Copper-Alloy Tubes1This s
13、pecification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipeand Tube.Current edition approved March 1,2018.Published March 2018.Originallyapproved in 1953.Last previous edition approved in 2016 as B280 16.DOI:1
14、0.1520/B0280-18.2For 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.3The last approved version of this historical stan
15、dard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized princ
16、iples on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 E255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical Composition2.2 ASME Standard:4B1622 Wrought Copper and Copper Alloy Solder JointPressure Fittings3.Terminology3.1 Definitions:3.1.1 average diameter(for round tubes only),nthe aver-age of the
