1、Designation:D241221Standard Test Method forDetermination of External Loading Characteristics of PlasticPipe by Parallel-Plate Loading1This standard is issued under the fixed designation D2412;the number immediately following the designation indicates the year oforiginal adoption or,in the case of re
2、vision,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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method c
3、overs the determination of load-deflection characteristics of plastic pipe under parallel-plateloading.1.2 This test method covers thermoplastic resin pipe,rein-forced thermosetting resin pipe(RTRP),and reinforced poly-mer mortar pipe(RPMP).1.3 The characteristics determined by this test method arep
4、ipe stiffness,stiffness factor,and load at specific deflections.1.4 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.NOTE1While this test m
5、ethod can be used in measuring the pipestiffness of corrugated plastic pipe or tubing,other profile wall designs,and products produced from polyethylene,PVC or polypropylene,specialconditions and procedures are used.These details are included in theproduct standards,for example,Specifications F667/F
6、667M,F949,F2764/F2764M,and others.1.5 The text of this test method references notes andfootnotes that provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the test method.1.6 This standard does not purport to address al
7、l 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.1.7 This international standard was developed in acc
8、or-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 S
9、tandards:2D695 Test Method for Compressive Properties of RigidPlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for
10、 Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF412 Terminology Relating to Plastic Piping SystemsF667/F667M Specification for 3 through 24 in.CorrugatedPolyethylene Pipe and FittingsF949 Specification for Poly(Vinyl Chloride)(PVC)Corru-gated Sewer Pipe With a Smooth
11、Interior and FittingsF2764/F2764M Specification for 6 to 60 in.150 to 1500mm Polypropylene(PP)Corrugated Double and TripleWall Pipe and Fittings for Non-Pressure Sanitary SewerApplications3.Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology F412,and abbreviations are in accord
12、ance with Termi-nology D1600,unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 ymeasured change of the inside diameter in thedirection of load application expressed in inches(millimetres).3.2.2 initial inside diameter(d)the average of the insidediameters as determin
13、ed for the several test specimens andexpressed in inches(millimetres).3.2.3 load(F)the load applied to the pipe to produce agiven percentage deflection.Expressed as newtons per metre orpounds-force per linear inch.1This test method is under the jurisdiction of ASTM Committee F17 on PlasticPiping Sys
14、tems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Feb.1,2021.Published February 2021.Originallyapproved in 1965.Last previous edition approved in 2018 as D2412 11(2018).DOI:10.1520/D2412-21.2For referenced ASTM standards,visit the ASTM website,www.a
15、stm.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 C7
16、00,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.13.2.4 mean radius(r)the mid-wall radius determined bysubtracting the average wall thickness from the average outsidediameter and dividing
