1、Designation:D229012Standard Test Method forApparent Hoop Tensile Strength of Plastic or ReinforcedPlastic Pipe1This standard is issued under the fixed designation D2290;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、 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 covers the determination
3、 of the com-parative apparent tensile strength of most plastic productsutilizing a split disk or ring segment test fixture,when testedunder defined conditions of pretreatment,temperature,humidity,and test machine speed.This test method is appli-cable to reinforced-thermosetting resin pipe regardless
4、 offabrication method.This test method also is applicable toextruded and molded thermoplastic pipe.Procedure A is used for reinforced-thermosetting resin pipe;Procedure B is used for thermoplastic pipe of any size;Procedure C is used for thermoplastic pipe with nominaldiameter of 412in.(110 mm)and g
5、reater.Procedure D is usedfor polyethylene pipe with a nominal diameter of 14 in.(350mm)and greater and preferably having wall thickness 1 in.(25mm)and greater.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI un
6、its that are provided for information onlyand are not considered standard.1.3 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 and health practices and determine th
7、e applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1599 Test Method for Resistance to Short-Time HydraulicPressure of Plastic Pipe,Tubing,and FittingsE4 Practices for Force Verification of Testing Mach
8、ines3.Summary of Test Method3.1 For Procedures A,B,and C,the test specimen is loadedthrough the suggested self-aligning split disk test fixture(Fig.1)which applies tensile stress to the test ring.An apparenttensile strength rather than a true tensile strength is obtained inthis test because of a ben
9、ding moment imposed during test atthe split between the split disk test fixture.This moment isinduced by the change in contour of the ring between the twodisk sections as they separate.The test fixture is designed tominimize the effect of this bending moment.3.2 For Procedure D,ring segment test spe
10、cimen pairs areloaded into the suggested self-aligning test fixtures(Fig.2)thatare designed to apply direct tensile stress to the reduced areasof the ring segment test specimens(Fig.3)with minimalbending moment.4.Significance and Use4.1 Split disk and ring segment tensile tests,properlyinterpreted,p
11、rovide reasonably accurate information with re-gard to the apparent tensile strength of plastic pipe whenemployed under conditions approximating those under whichthe tests are made.4.2 Ring tensile tests may provide data for research anddevelopment,engineering design,quality control,acceptanceor rej
12、ection under specifications,and for special purposes.Thetest cannot be considered significant for applications differingwidely from the load-time scale of the standard test.NOTE1Procedure C has been used on polyethylene and polybutylenepipe to produce results equivalent to Quick Burst results(Test M
13、ethodD1599)for 4 in.to 8 in.pipes.5.Apparatus5.1 MicrometersSuitable ball anvil-type micrometers,reading to at least 0.001 in.,for measuring the width andthickness of the test specimens.5.2 Testing MachineA universal testing machine of theconstant-rate-of-cross-head-movement type and comprisingessen
14、tially the following:1This test method is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved Dec.1,2012.Published January 2013.Originallyapproved in 1964.Last previous edition approved
15、in 2008 as D2290 08.DOI:10.1520/D2290-12.2For 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 sec
16、tion appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2.1 Drive MechanismA drive mechanism for impartingto the crosshead a uniform controlled velocity with respect tothe base,this velocity to be regulated as specified in Section 9.5.2.2 Load IndicatorA load-indicating mechanism ca-pable of showing the total tensile load carried by the testspecimen.This mechanism shall be essentially free frominertia
