ASTM_F_2634_-_15.pdf

Designation:F263415Standard Test Method forLaboratory Testing of Polyethylene(PE)Butt Fusion Jointsusing Tensile-Impact Method1This standard is issued under the fixed designation F2634;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 is a tensile impact test method that developsenough tensile impact energy at specific rates of strain torupture standard tensile impact specimens of butt fused plasticpipe.It is used to determine the quality of PE butt fusion jointsmade in the field or in qualification testing.It can also be usedto determine the optimum butt fusion joining parameters of PEmaterials.1.2 This test method is applicable for testing pipe specimenswith a diameter 2.37 in.(60.3 mm)and larger with a wallthickness from 0.25 in.(6.3 mm)and larger.NOTE1This test method is similar to ISO 13953.1.3 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 This test method may be used alone or together withother test methods,to evaluate the quality of the butt fusedjoints.When this test,conducted at laboratory temperatures per9.2,is combined with the elevated temperature,sustainedpressure test in Specification D3035,both the short term andlong term strength of the PE butt fusion joint will be verified.1.5 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:2D883 Terminology Relating to PlasticsD2513 Specification for Polyethylene(PE)Gas PressurePipe,Tubing,and FittingsD3035 Specification for Polyethylene(PE)Plastic Pipe(DR-PR)Based on Controlled Outside DiameterE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO Standard3ISO 13953 Polyethylene(PE)pipes and fittings-Determi-nation of the tensile strength and failure mode of testpieces from a butt-fused joint3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 brittle rupture A brittle rupture in a butt fusion jointspecimen consists of a clean or nearly clean part between thejoining surfaces resulting in a smooth surface on both sides.(See Fig.1.)3.1.2 ductile ruptureAductile rupture in a butt fusion jointspecimen consists of either an elongation rupture of themachined pipe outside the joint area(see Fig.2)or adjacent tothe butt fusion joint interface but resulting in considerablematerial tearing between the pipe end surfaces(see Fig.3).3.1.3 maximum forcethe maximum force obtained duringthe test.3.1.4 rupture energythe energy required to rupture thecoupon.3.1.5 yield point The point on the force/time curve wheresignificant plastic deformation begins to occur.For the pur-poses of this standard,this is defined as occurring at zero slopepoint on the force/time curve.3.1.6 yield energy The energy imparted to the coupon bythe yield point.3.1.7 average velocityThe average velocity is the averagecrosshead speed for the duration(until coupon rupture)of thetensile test(inches/sec.)1This test method is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Nov.1,2015.Published November 2015.Originallyapproved in 2007.Last previous edition approved in 2010 as F2634 10.DOI:10.1520/F2634-15.2For 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.3Available from International Organization for Standardization(ISO),1 rue deVaremb,Case postale 56,CH-1211,Geneva 20,Switzerland,http:/www.iso.ch.*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 3.1.8instantaneous velocityThe crosshead velocity atany discrete point during the test.This may be plotted to showthe consistency of the velocity profile through the duration ofthe test.3.1.9 yield stressThe stress value corresponding to theyield point.3.1.9.1 DiscussionAdditional definitions of terms apply-ing to tensile test methods appear in Terminology D883.4.Significance and Use4.1 This test method is designed to impart tensile impactenergy to a butt fused plastic pipe specimen,record the energyto fail the specimen an