1、Designation:D212222Standard Test Method forDetermining Dimensions of Thermoplastic Pipe andFittings1This standard is issued under the fixed designation D2122;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the determination of diamete
3、r,wall thickness,and length dimensions of thermoplastic pipe.Included are procedures for measurement of the inside diam-eter of pipe intended to be joined by internal fittings,measure-ment of the average outside diameter for roundable pipe whereout-of-roundness is not of primary concern,out-of-round
4、nessmeasurement and measurement of the average outside diameterof non-roundable pipe,and for determining length and straight-ness.1.2 This test method also includes procedures for dimen-sioning molded thermoplastic pipe fittings.1.3 The values stated in inch-pound units are to be regardedas standard
5、.The values given in parentheses are mathematicalconversions to SI units that are 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 t
6、o establish appro-priate safety,health,and environmental practices and deter-mine 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 Princi
7、ples 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:2D618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of Plast
8、icsD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsF412 Terminology Relating to Plastic Piping SystemsF1498 Specification for Taper Pipe Threads 60 for Thermo-plastic Pipe and Fittings2.2 ANSI Standard:3B 2.1 Pipe Threads(Except Dr
9、yseal)3.Terminology3.1 Definitions:3.1.1 GeneralDefinitions are in accordance with Termi-nology F412,unless otherwise specified.3.1.2 deviation from straightnessthe maximum deviationfrom a straight line exhibited by a pipe specimen divided by thelength of the specimen.3.1.3 nonroundable pipepipe mad
10、e from a material hav-ing a tensile or flexural modulus of elasticity of 150 000 psi(103 MPa)or greater,as determined by Test Method D638 orD790,and in addition,having an outside diameter/wall thick-ness ratio of less than 20.3.1.3.1 DiscussionThe above definitions apply to thermo-plastic pipe and a
11、re based on the ability or inability of a pipeto round out when forced into a tapered socket.3.1.4 roundable pipe(1)pipe made from material having atensile or flexural modulus of elasticity less than 150 000 psi(103 MPa)as determined by Test Method D638 or D790;and(2)pipe made from a material having
12、 a tensile or flexuralmodulus of elasticity of 150 000 psi(103 MPa)or greater,asdetermined by Test Method D638 or D790,and in addition,having an outside diameter/wall thickness ratio of 20 orgreater.3.1.5socket bottomthe point at which the pipe stopradius intersects wall.1This test method is under t
13、he jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved July 1,2022.Published September 2022.Originallyapproved in 1962.Last previous edition approved in 2016 as D2122 16.DOI:10.1520/D2122-222For r
14、eferenced 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.3Available from American National Standards Institute(ANSI),25 W.43rd St
15、.,4th Floor,New York,NY 10036,http:/www.ansi.org.*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 r
16、ecognized 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.14.Summary of Test Method4.1 Alternate MethodsAlternate methods and proceduresfor obtaining dimensions(such as apparatus and proceduresusing laser,electronic,nuclear,ultrasonic,or other means)arenot prohibited.4.1.1 The user of an alternate method shall validate t