1、Designation:D159821Standard Test Method forTime-to-Failure of Plastic Pipe Under Constant InternalPressure1This standard is issued under the fixed designation D1598;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.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 test method covers the determination of the time-to-failure of both thermoplastic and reinforced thermosetting/resin pipe und
3、er constant internal pressure.1.2 This test method provides a method of characterizingplastics in the form of pipe under the conditions prescribed.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
4、provided for information onlyand are not considered standard.1.4 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,health,and environmental practices and deter-mine
5、the applicability of regulatory limitations prior 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 iss
6、ued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2837 Test Method for Obtaining Hydrostatic Design
7、 Basisfor Thermoplastic Pipe Materials or Pressure Design Basisfor Thermoplastic Pipe ProductsD2992 Practice for Obtaining Hydrostatic or Pressure De-sign Basis for“Fiberglass”(Glass-Fiber-ReinforcedThermosetting-Resin)Pipe and FittingsD2517 Specification for Reinforced Epoxy Resin Gas Pres-sure Pip
8、e and FittingsD3567 Practice for Determining Dimensions of“Fiberglass”(Glass-Fiber-Reinforced Thermosetting Resin)Pipe andFittings3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 failure,noccurrence of ballooning,rupture,seepageor weeping.3.1.1.1 ballooning,nany localized expans
9、ion of a pipewhile under internal pressure.This is sometimes referred to asductile failure.3.1.1.1.1 DiscussionOverall distention caused by appliedstress is not considered to be a failure.3.1.1.2 rupture,na break in the pipe wall with immediateloss of test fluid and continued loss at essentially no
10、pressure.If rupture is not preceded by some yielding,this may be termeda non-ductile failure.3.1.1.3 seepage or weeping,ntest fluid passing throughcracks in the pipe wall to an extent detectable visually orelectronically.A reduction in pressure will frequently enablethe pipe to carry fluid without a
11、pparent evidence of loss offluid.3.1.2 free(unrestrained)end closure,na pipe specimenend closure(cap)that seals the end of the pipe against loss ofinternal fluid and is fastened to the pipe specimen.3.1.3 restrained end closure,na pipe specimen end clo-sure(cap)that seals the end of the specimen aga
12、inst loss ofinternal fluid and pressure,but is not fastened to the pipespecimen.Retained end closures rely on tie-rod(s)through thepipe specimen or on an external structure to resist internalpressure end thrust.4.Summary of Test Method4.1 This test method consists of exposing specimens of pipeto a c
13、onstant internal pressure while in a controlled environ-ment.Such a controlled environment may be accomplished by,but is not limited to,immersing the specimens in a controlledtemperature water or air bath.The time-to-failure is measured.1This test method is under the jurisdiction of ASTM Committee F
14、17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Nov.1,2021.Published November 2021.Originallyapproved 1958.Last previous edition approved in 2015 as D1598 15a.DOI:10.1520/D1598-212For referenced ASTM standards,visit the ASTM
15、 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor D
16、rive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles 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?NOTE1Dimensional changes should be measured on specimensundergoing long-term strength tests.Measurements using circumferen