1、Designation:D536518An American National StandardStandard Test Method forLong-Term Ring-Bending Strain of“Fiberglass”(Glass-Fiber-Reinforced Thermosetting-Resin)Pipe1This standard is issued under the fixed designation D5365;the number immediately following the designation indicates the year oforigina
2、l 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 test method covers a procedure for determining thelong-term ring-be
3、nding strain(Sb)of“fiberglass”pipe.Bothglass-fiber-reinforced thermosetting-resin pipe(RTRP)andglass-fiber-reinforced polymer mortar pipe(RPMP)are“fiber-glass”pipes.1.2 The values stated in inch-pound units are to be regardedas the standard.The SI units given in parentheses are forinformation only.1
4、.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Aspec
5、ific warning statement is given in 9.5.NOTE1There is no known ISO equivalent to this standard.1.4 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 Stan
6、dards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3567 Practice for Determining Dimensions of“Fi
7、berglass”(Glass-Fiber-Reinforced Thermosetting Resin)Pipe andFittings3.Terminology3.1 Definitions:3.1.1 GeneralDefinitions are in accordance with Termi-nology D883 and abbreviations are in accordance with Termi-nology D1600 unless otherwise indicated.3.2 Definitions of Terms Specific to This Standar
8、d:3.2.1 end pointthe failure of the test specimen.The failuremode may be catastrophic,characterized by a sudden fracturethrough the pipe wall in the area of greatest strain.3.2.2 fiberglass pipetubular product containing glass-fiberreinforcements embedded in or surrounded by curing thermo-setting re
9、sin.The composite structure may contain aggregate,granular or platelet fillers,thixotropic agents,pigments,ordyes;thermoplastic or thermosetting liners or coatings may beincluded.3.2.3 reinforced polymer mortar pipe(RPMP)fiberglasspipe with aggregate.3.2.4 reinforcedthermosettingresinpipe(RTRP)fiber
10、glass pipe without aggregate.4.Summary of Test Method4.1 This test method consists of subjecting submerged-pipering specimens to various increasing deflections induced by aconstant load and monitoring the time to failure.Aminimum of18 samples are required.Test temperatures are obtained bytesting in
11、a fluid environment where the temperature iscontrolled.4.2 The long-term ring-bending strain is obtained by anextrapolation to 50 years of a log-log linear regression line forfailure strain versus time.NOTE2It is the consensus of Subcommittee D20.23 that the log-loglinear regression analysis of test
12、 data is a conservative approach and isrepresentative of standard industry practice.5.Significance and Use5.1 This test method determines the long-term ring-bendingstrain of pipe when deflected under constant load and im-mersed in a chemical environment.It has been found thateffects of chemical envi
13、ronments can be accelerated by straininduced by deflection.This information is useful and necessaryfor the design and application of buried fiberglass pipe.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.23 on Reinforc
14、ed PlasticPiping Systems and Chemical Equipment.Current edition approved Aug.1,2018.Published August 2018.Originallyapproved in 1993.Last previous edition approved in 2012 as D5365-12.DOI:10.1520/D5365-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Serv
15、ice 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 Drive,PO Box C700,West Conshohocken,PA 19428-2959.U
16、nited 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 NOTE3Pipe of the same diameter but of different wall thicknesseswill develop different strains with the same deflection.Also,pipes havingthe same wall thickness but differe
