ASTM_B_919_-_12.pdf

Designation:B91912Standard Specification forWelded Copper Heat Exchanger Tubes With InternalEnhancement1This standard is issued under the fixed designation B919;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.1.Scope*1.1 This specification establishes the requirements forwelded,internally enhanced copper tube,in straight lengths orcoils,suitable for use in refrigeration and air conditioningproducts or other heat exchangers.1.2 UnitsThe values stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.3 The product shall be produced of the following coppers.Unless otherwise specified,tubes made from any one of thesecoppers may be supplied:Copper UNS No.Type of MetalC10200Oxygen-free without residual deoxidantsC12200Phosphorized,high residual phosphorus(DHP)1.4 The following pertains to the test method described in18.4 of this specification.This standard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2B153 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 Classification for Temper Designations for Copper andCopper AlloysWrought and CastB846 Terminology for Copper and Copper AlloysE3 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in UnalloyedCopper by GravimetryE62 Test Methods for Chemical Analysis of Copper andCopperAlloys(Photometric Methods)(Withdrawn 2010)3E112 Test Methods for Determining Average Grain SizeE243 Practice for Electromagnetic(Eddy Current)Examina-tion of Copper and Copper-Alloy TubesE255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 CompositionE2575 Test Method for Determination of Oxygen in Copperand Copper Alloys3.Terminology3.1 For the definition of terms related to copper and copperalloys refer to Terminology B846.3.2 Definitions:3.2.1 bottom wall,nthe wall thickness measured from thebase of the enhancement to the outside surface.3.2.2 coil,na length of the product wound into a series ofconnected turns.3.2.3 enhancement,na geometrical feature intentionallyformed on a tube I.D.surface to improve heat transfer.3.2.4 level wound,adja type of coil in which the turns arewound into layers parallel to the axis of the coil such thatsuccessive turns in a given layer are next to one another.3.3 Definitions of Terms Specific to This Standard:3.3.1 roundness tolerance,nthe roundness tolerance isdefined as the maximum OD at a point minus the minimumOD,at the same plane of intersection of the tube,divided bythe specified OD 100%.3.3.2 squareness of cut,nthe maximum deviation of oneside of a cross section from the opposite side,when measured1This 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 April 1,2012.Published May 2012.Originallyapproved in 2001.Last previous edition approved in 2006 as B919 01(2006).DOI:10.1520/B0919-12.2For 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 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 against the projected perpendicularity of the plane of theprojected center of the tube at the ends.4.Classification4.1 The following types of welded tube are manufacturedunder the scope of this specification:4.1.1 As-WeldedWelded tube without subsequent heattreatment or cold work.4.1.2 Welded Tube,Subsequently AnnealedWelded tubeannealed to produce a uniform grain size appropriate to thespecified annealed temper.5.Ordering Information5.1 Include the following information when placing ordersfor product under this specification:5.1.1 ASTM designation number and year of issue,5.1.2 Copper UNS No.,5.1.3 Tube type(Section 4),5.1.4 Temper(Section 8),5.1.5 Length,diameter,bot