ASTM_B_68_-_B_68M_-_11.pdf

Designation:B68/B68M11Standard Specification forSeamless Copper Tube,Bright Annealed1This standard is issued under the fixed designation B68/B68M;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of 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 Department of Defense.1.Scope*1.1 This specification establishes the requirements for brightannealed seamless copper tube suitable for use in refrigeration,oil lines,gasoline lines,and so forth,where tube with aninterior surface essentially free from scale and dirt is required.1.1.1 Tubes made from any of the following Copper UNSNo.designations shall be supplied,unless otherwise specifiedin the contract or purchase order:Copper UNS No.2Type of CopperC10200Oxygen-free without residual deoxidantsC10300Oxygen-free,extra low phosphorusC10800Oxygen-free,low phosphorusC12000Phosphorus deoxidized,low residual phosphorusC12200Phosphorus deoxidized,high residual phosphorus1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues 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 in non-conformance with the standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3B153 Test Method for Expansion(Pin Test)of Copper andCopper-Alloy Pipe and TubingB251 Specification for General Requirements for WroughtSeamless Copper and Copper-Alloy TubeB251M Specification for General Requirements for WroughtSeamless Copper and Copper-Alloy Tube(Metric)B577 Test Methods for Detection of Cuprous Oxide(Hydro-gen Embrittlement Susceptibility)in CopperB601 Classification for Temper Designations for Copper andCopper AlloysWrought and CastB846 Terminology for Copper and Copper AlloysB968/B968M Test Method for Flattening of Copper andCopper-Alloy Pipe and TubeE3 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 Determination of Copper in UnalloyedCopper by GravimetryE62 Test Methods for Chemical Analysis of Copper andCopperAlloys(Photometric Methods)(Withdrawn 2010)4E112 Test Methods for Determining Average Grain SizeE243 Practice for Electromagnetic(Eddy-Current)Examina-tion of Copper and Copper-Alloy TubesE255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)E2575 Test Method for Determination of Oxygen in Copperand Copper Alloys3.General Requirements3.1 The following sections of Specification B251 or B251Mare a part of this specification.3.1.1 Terminology,General,3.1.2 Material and Manufacture,3.1.3 Workmanship,Finish,and Appearance,3.1.4 Significance of Numerical Limits,3.1.5 Inspection,3.1.6 Rejection and Rehearing,3.1.7 Certification,3.1.8 Test Reports,1This specification 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 Feb.15,2011.Published March 2011.Originallyapproved in 1922.Last previous edition approved in 2002 as B68 02.DOI:10.1520/B0068_B0068M-11.2Refer to Practice E527 for explanation of unified numbering system(UNS).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.4The last approved version of this historical standard 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 States1 3.1.9 Packaging and Package Marking,and3.1.10 Supplementary Requirements.3.2 In addition,when a section with an identical title tothose referenced in 3.1 appears in this specification,suchsection may contain requirements which supersede thoseappearing in Specification B251 or B251M.In case of conflict,this specification prevails.4.Terminology4.1 Definitions:4.1.1 See Terminology B846 for definitions of terms relatedto copper and copper alloys.4.1.2 bright anneal,nthe surface obtained by annealingunder conditions of controlled atmosphere to prevent oxidationand to retain the original luster