1、Designation:F158896(Reapproved 2015)Standard Test Method forConstant Tensile Load Joint Test(CTLJT)1This standard is issued under the fixed designation F1588;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、 number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 The constant tensile load joint test(CTLJT)is designedto demonstrate that a joint in a plastic piping system is resistantto the effects of
3、 long-term creep.1.1.1 The joint is subjected to an internal pressure at leastequal to its operating pressure and a sustained axial tensile loadfor a specified time period,usually 1000 h.The joint shall notleak,nor may the pipe completely pull out for the test duration.The total axial stress is set
4、by the referencing document.1.1.2 Some typical conditions for testing of joints on poly-ethylene pipe are described in Appendix X1.1.2 This test is usually performed at 73F(22.8C).1.3 The CTLJT was developed to demonstrate the long-termresistance to pullout of mechanical joints on polyethylene gaspi
5、pe.The CTLJT has also been successfully applied to theevaluation of other components of plastic piping systems.These applications are discussed in Appendix X1.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI uni
6、ts that are provided for information onlyand are not considered standard.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
7、 applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D638 Test Method for Tensile Properties of PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2513 Specif
8、ication for Polyethylene(PE)Gas PressurePipe,Tubing,and FittingsF412 Terminology Relating to Plastic Piping Systems2.2 ANSI Standard:3B31.8 Gas Transmission and Distribution Piping Systems2.3 Code of Federal Regulations:4OPS Part 192,Title 493.Terminology3.1 Definitions:3.1.1 GeneralDefinitions are
9、in accordance with TestMethod D638 and Terminology F412,unless otherwise speci-fied.Abbreviations are in accordance with TerminologyD1600.3.1.2 The gas industry terminology used in this test methodis in accordance with the definitions given in ANSI B31.8 orOPS Part 192,Title 49,unless otherwise indi
10、cated.3.2 Definitions of Terms Specific to This Standard:3.2.1 mechanical joint,Category 1a mechanical jointdesign that provides a seal plus a resistance to force on the pipeend,equal to or greater than that which will cause a permanentdeformation of the pipe or tubing.(D2513)3.2.2 mechanical joint,
11、Category 3a mechanical jointdesign that provides a seal plus a pipe restraint rating equiva-lent to the anticipated thermal stresses occurring in a pipeline.This category has a manufacturers pipe-end restraint thatallows slippage at less than the value required to yield the pipe.(D2513)3.2.3 piperef
12、ers to both pipe and tubing.4.Summary of Test Method4.1 A joint is subjected to a sustained axial load for aspecified period of time(usually 1000 h).The test duration andthe actual test conditions(axial stress,internal pressure,testduration,and test temperature)are either specified by areferencing d
13、ocument or,for new or unique applications,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 Aug.1,2015.Published November 2015.Originallyapproved in 1995.Last prev
14、ious edition approved in 2011 as F158896(2011).DOI:10.1520/F1588-96R15.2For 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 web
15、site.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from U.S.Government Publishing Office,732 N.Capitol St.,NW,Washington,DC 20401-0001,http:/www.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C70
16、0,West Conshohocken,PA 19428-2959.United States1 agreed upon between the user and the manufacturer.X1.2contains a background discussion of axial stress values andaxial load determination.4.2 The joint is made to plastic pipe of the type,grade,size,and dimension ratio to be used in the final application.Theaxial tensile stress should be as high as possible,but shall belower than the stress at which the plastic material continues tostretch and finally yields(the long-term yield strength)(seeNote 1
