ASTM_D_2925_-_14_2019.pdf

Designation:D292514(Reapproved 2019)Standard Test Method forBeam Deflection of“Fiberglass”(Glass-Fiber-ReinforcedThermosetting Resin)Pipe Under Full Bore Flow1This standard is issued under the fixed designation D2925;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 test method covers measurement of the deflectionas a function of time of a specimen of fiberglass pipe supportedon a flat non-arced support as a simple beam under full boreflow of water at elevated temperatures.Both glass-fiber-reinforced thermosetting-resin pipe(RTRP)and glass-fiber-reinforced polymer mortar pipe(RPMP)are fiberglass pipes.NOTE1For the purposes of this standard,polymer does not includenatural polymers.1.2 This test method can be used to determine deflection atvarying conditions by substituting other test media.1.3 Deflections observed using this test method are repre-sentative only of piping supported as a simple beam under fullbore flow which has one diameter of pipe overhanging at eachsupport.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are provided forinformation purposes only.NOTE2There is no known ISO equivalent to this 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 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 issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C33/C33M Specification for Concrete AggregatesD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3567 Practice for Determining Dimensions of“Fiberglass”(Glass-Fiber-Reinforced Thermosetting Resin)Pipe andFittingsF412 Terminology Relating to Plastic Piping Systems3.Terminology3.1 GeneralDefinitions are in accordance with Terminolo-gies D883 and F412 and abbreviations are in accordance withTerminology D1600,unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:3.2.1 aggregatea siliceous sand conforming to the re-quirements of Specification C33/C33M,except that the re-quirements for gradation shall not apply.3.2.2 fiberglass pipea tubular product containing glassfiber reinforcement embedded in or surrounded by curedthermosetting resin;the composite structure may containaggregate,granular or platelet fillers,thixotropic agents,pigments,or dyes;thermoplastic or thermosetting liners maybe included.3.2.3 reinforced thermosetting resin pipe(RTRP)a fiber-glass pipe without aggregate.3.2.4 reinforced polymer mortar pipe(RPMP)a fiberglasspipe with aggregate.4.Significance and Use4.1 In the absence of deflection measurements from actualinstalled-above-ground piping,this test method may be used to1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.23 on Reinforced PlasticPiping Systems and Chemical Equipment.Current edition approved Aug.1,2019.Published August 2019.Originallyapproved in 1970.Last previous edition approved in 2014 as D2925 14.DOI:10.1520/D2925-14R19.2For 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.*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 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 evaluate the influence of span length on mid-span deflections atdiffering temperatures under full bore flow.NOTE3A flat bearing area,small contact area,and narrow bearingwidth may induce high localized support interaction stresses,and con-straints imposed by the supports may also adversely influence deflectionsand performance of the pipe.5.Apparatus5.1 Rigid Support with edges rounded to a 6-mm(14-in.)radius,consisting of two uprights of a convenient height.Theuprights are to be spaced at a predetermined distance overwhich deflection is to be