1、Designation: D2143 15 An American National StandardStandard Test Method forCyclic Pressure Strength of Reinforced, ThermosettingPlastic Pipe1This standard is issued under the fixed designation D2143; the number immediately following the designation indicates the year oforiginal adoption or, in the c
2、ase 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 the determination of the failurecharacteristics of reinforced pl
3、astic pipe when subjected tocyclic internal hydraulic pressure. It is limited to pipe in whichthe ratio of outside diameter to wall thickness is 10:1 or more.1.2 The values stated in inch-pound units are to be regardedas the standard. The values in parentheses are for informationonly.1.3 This standa
4、rd 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 the applica-bility of regulatory limitations prior to use.NOTE 1There is no known ISO eq
5、uivalent to this standard.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD2992 Practice for Obtaining Hydrostatic or Pressure De-sign Basis for “Fiberglass” (Glass-Fiber-ReinforcedThermosetting-Resin) Pipe and FittingsD3567 Practice for Determining Dime
6、nsions of “Fiberglass”(Glass-Fiber-Reinforced Thermosetting Resin) Pipe andFittings3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 failurethe transmission of the test fluid through thepipe wall in any manner, whether it be wall fracture, localizedleaking, or weeping at a dista
7、nce greater than one diameterfrom the end closure (specimens failing within one diameter ofthe end closure shall be discarded).3.1.2 failure detectora devise that measures the electricalresistance between the test fluid and a conductive material,wrapped around the circumference of the test specimen,
8、 andwhich will indicate failure when 1) the resistance is lowered toa range from 10 to 20 meg-ohm or 2) for the case of municipalwater, when the first drop of fluid has passed through the wallof the specimen.3.1.3 localized leakingfailure that occurs as small frac-tures (one or more in a test specim
9、en) that permit the test fluidto be transferred at a rate that is measured by the failuredetector.3.1.4 weepinga general transmission of the test fluidthrough the pipe, without visible fracture, at a sufficient rate tobe measured by the failure dectector, or in the case of largermagnitudes of fluid
10、transmission appear to be moisture con-densation on the specimen.3.1.5 wall fracturefailure by a break in the pipe wallcausing immediate loss of test fluid and continued loss atessentially no pressure.4. Summary of Test Method4.1 This test method consists of exposing pipe specimens tocyclic internal
11、 pressures at several different pressure levels andmeasuring the cycles to failure at these different levels. Testtemperatures are obtained by circulating salt water or munici-pal water through the specimens.5. Significance and Use5.1 The values obtained by this test method are applicableonly to con
12、ditions that specifically duplicate the proceduresused.5.2 After the regression characteristics of a pipe materialand manufacturing process have been determined by this testmethod, one pressure may be used for quality-control purposes.This pressure shall be one of the points used in the originaldete
13、rmination and be agreed upon between the individualsconcerned.5.3 This test method deals with cyclic internal pressureperformance of a pipe and omits creep and nonrecoverabledeformation measurements.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct respon
14、sibility of Subcommittee D20.23 on Reinforced PlasticPiping Systems and Chemical Equipment.Current edition approved May 1, 2015. Published June 2015. Originallyapproved in 1963. Last previous edition approved in 2010 as D2143 00(2010).DOI: 10.1520/D2143-15.2For referenced ASTM standards, visit the A
15、STM 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
16、Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.4 For determination of the cyclic hydrostatic design basisusing data from this test method see Practice D2992.5.5 In the application of the following test requirements andrecommendations it is assumed that test specimens of
17、 a givensample of pipe are truly representative of that material andmanufacturing process. In tests conducted to show the effect oftemperature and pressures on the life span of the pipe, greatcare must be taken to ensure that the specimens being tested arerepresentative of the group being studied. D
18、eparture from thisassumption could introduce discrepancies that are greater thanthose introduced by departure from the details of the procedureoutlined in this test method.6. Apparatus6.1 A schematic diagram of the apparatus is shown in Fig. 1and shall consist of the following:6.1.1 Pressurizing Sys
19、temA device capable of exertingcyclic internal pressure of the salt water or municipal water tothe test specimens. Fig. 1 shows an oil pump leading to afour-way solenoid-operated valve which directs the fluid alter-nately to the two pressure legs, each of which contains aspring-operated, manually ad
20、justable, pressure relief valve andan accumulator which acts as a fluid separator transferring thepressurizing medium to the salt solution or municipal water.The solenoid is operated with equal on and off times by anelectric pulsator.6.1.2 Test FluidThe test fluid shall be a 2 % aqueoussodium chlori
21、de solution when salt water or municipal water isused.6.1.3 Temperature BathA thermostatically controlled bathcoupled into the test fluid, which maintains specimen tempera-ture to within 65F (62C). The circulation of this fluid ispumped on the off portion of the pressure cycle.6.1.4 Pressure GagesPr
22、essure gages having a precision ofnot less than 1 % of full-scale deflection with a maximumindicating hand. The pressure gage shall be selected such thatthe final readings are in the mid-60 % range of the scale. Thegage should be equipped with a surge protection device.6.1.5 Specimen FittingsAny sui
23、table closure that allowsfree end mounting, and does not contribute to end failures maybe used.6.1.6 Specimen SupportAny support is acceptable as longas it does not contribute to the restraint of the specimen ineither the circumferential or axial direction.6.1.7 Cycle Counter and Failure DetectorEac
24、h group ofspecimens shall be outfitted with a cyclic counter and a failuredetector which automatically stops the cyclic count when thespecimen has failed.7. Test Specimens7.1 Sample SizeSee Practice D2992.7.2 Specimen SizeFor pipe sizes of 6 in. (150 mm) or less,the specimen length between the end c
25、losures shall be not lessthan five times the outside diameter of the pipe, but in no caseless than 12 in. (300 mm). For larger sizes, the minimum lengthshall be not less than three times the outside diameter, but in nocase less than 30 in. (760 mm).FIG. 1 Schematic Drawing of Cyclic Pressure Apparat
26、usD2143 1527.3 Measurement of DimensionsThe physical dimensionsof the pipe shall be measured in accordance with PracticeD3567.8. Conditioning8.1 Precondition all specimens in the standard laboratoryatmosphere as specified in Practice D618.8.2 The specimen shall be suitable for test when thetemperatu
27、re of the test fluid, at both inlet and outlet, ismaintained within 5F (2.8C) of the test temperature for aperiod of 1 h.8.3 Ambient temperature need not be controlled.9. Procedure9.1 Attach the specimen with end closures into the system,being careful to eliminate all air from the entire system.9.2
28、With the valves to the specimens closed and the powerpump operating, adjust the pressure regulator to the desiredpressure.9.3 Open the bypass needle valves, and with the circulatingpump running, circulate the salt solution through the specimento obtain the desired test temperature for conditioning.9
29、.4 Close the bypass needle valve to permit only enough testfluid to pass through to maintain the test temperature. Connectthe failure detector units, reset these units to zero, and start themain power pump.9.5 Adjust the cycling rate to at least 25 6 2 cycles/min.9.6 As additional specimens are adde
30、d or removed from thesystem, maintain the maximum pressure condition desired byreadjusting the cyclic rate to at least 25 6 2 cycles/min.9.7 After each specimen fails, record the failure count asindicated by the failure detector.10. Calculation10.1 Calculate the hoop stress in the pipe specimen asfo
31、llows:S 5 PD 2 t!/2twhere:S = hoop stress, psi (MPa),P = internal pressure, psi (MPa),D = average outside diameter, in. (mm), andt = minimum wall thickness, in. (mm).10.2 For the statistical calculation method, see PracticeD2992.11. Report11.1 Report the following information:11.1.1 Complete identif
32、ication of specimens, including ma-terial type, source, manufacturers name and code number, andprevious history,11.1.2 Pipe dimensions,11.1.3 Test temperature and test fluid,11.1.4 Cyclic rate and cycles to failure of each specimentested and nature of the failure,11.1.5 Correlation coefficient,11.1.
33、6 Any unusual effects or observations during or prior tothe test,11.1.7 Dates of test.12. Precision and Bias12.1 No precision and bias statement can be made for thistest method since a controlled round-robin test program has notbeen run. A controlled round-robin program is not consideredfeasible due
34、 to the number of samples, the duration of time, andthe cyclic pressure apparatus specified by this test method.13. Keywords13.1 cyclic pressure strength; fiberglass pipe; hydrostaticdesign basis; pressure design basisSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to
35、 this standard since the last issue(D2143-00(2010) that may impact the use of this standard. (May 1, 2015)(1) Revised specimen length requirements in 7.2 to be consis-tent with Test Methods D1598 and D1599.D2143 153ASTM International takes no position respecting the validity of any patent rights ass
36、erted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time b
37、y the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will rece
38、ive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM Inte
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