1、Designation: F 1429 99 (Reapproved 2005)An American National StandardStandard Test Method forAssembly Force of Plastic Underground Conduit Joints ThatUse Flexible Elastomeric Seals Located in the Bell1This standard is issued under the fixed designation F 1429; the number immediately following the de
2、signation 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the
3、 determination of the relativeforce required to assemble plastic underground conduit jointsthat use flexible elastomeric seals located in the bell.1.2 The values stated in inch-pound units are to be regardedas the standard. The values stated in parentheses are providedfor information purposes only.1
4、.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 the applica-bility of regulatory limitations prior to use.2. Referenced Do
5、cuments2.1 ASTM Standards:2D 695 Test Method for Compressing Properties of RigidPlasticsF 412 Terminology Relating to Plastic Piping Systems3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 assembly forcethe peak force or effort required toinsert the spigot into the belled end f
6、or gasketed conduitjoining systems.3.1.2 chart recordera device that records on paper (orsimilar permanent medium) the readings obtained by a physicaltesting machine, such as a compression tester. The chartrecorder receives input from the testing machine in the form ofelectrical signals that are pro
7、portional to the test readings.3.1.3 gasketed conduit joining systema push-on conduitjoining system (see joint, push-on in Terminology F 412) withthe following three manufacturer-specified components thatinfluence joint assembly force: (1) the elastomeric seal, (2) thechamfer on the spigot, and (3)
8、the joint lubricant. This systemis as supplied or recommended by the conduit manufacturer.4. Summary of Test Method4.1 A sample of eight gasketed conduit bells of the samenominal diameter are prepared from typical production stock ofthe conduit manufacturer. An aluminum spigot mandrel madeto the spe
9、cifications of Annex A1 for the conduit size beingtested is inserted into each of the eight gasketed conduit bellspecimens by means of a compression tester and the jointsystem assembly force is recorded for each specimen. Themean and standard deviation of the sample of eight recordedassembly forces
10、is then calculated and recorded.4.2 Any variation in the type of gasket, spigot chamfer, orjoint lubricant specified by the manufacturer constitutes achange in the gasketed conduit joining system and requires thata new sample of eight specimens be tested.5. Significance and Use5.1 The assembly force
11、 of a conduit joining system is onemeasure of the ease of which the conduit system can beassembled and installed in the field. This test method providesa means by which to quantify the assembly force of gasketedconduit joining systems. The results of the testing can be usedto compare and categorize
12、the assembly force of differentdesigns of gasketed conduit joining systems.5.2 This test method is not intended for use as a qualitycontrol test.5.3 This test method can be used for comparison of gasketedconduit joining systems on the basis of assembly force. Noinformation about joint sealing perfor
13、mance can be obtainedfrom the use of this test method.5.4 This test method covers all plastic conduit with push-onjoints that use flexible elastomeric gaskets located in the bell toprovide the joint seal.5.5 This test method is also applicable to all fittings that arefabricated from conduit covered
14、in 5.4 and that utilize the sametype of push-on joints as the conduit covered in 5.4, and thatare intended for use with the conduit types described in 5.4. Forpurposes of this test method, assembly force data obtained1This test method is under the jurisdiction of ASTM Committee F17 on PlasticPiping
15、Systems and is the direct responsibility of Subcommittee F17.40 on TestMethods.Current edition approved May 1, 2005. Published May 2005. Originallyapproved in 1992. Last previous edition approved in 1999 as F 1429 99.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact AST
16、M Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.from the testing of the condu
17、it that is the parent stock of afitting shall apply to the fitting also.6. Apparatus6.1 Testing MachineA properly calibrated compressiontesting machine of the constant-rate-of-crosshead movementtype meeting the requirements of Testing Method D 695 shallbe used to make the tests. The compression test
18、er shall becapable of a compression rate of 20 6 0.5 in./min (500 6 12.7mm/min). The compression tester shall be equipped with achart recorder that is capable of recording compression forceversus time or position.6.2 Spigot MandrelsSpigot mandrels shall be constructedto mount rigidly to the compress
19、ion tester. The mandrels shallconform to the dimensions and specifications shown in AnnexA1.6.3 Joint LubricantJoint lubricant shall be used prior tothe assembly of the conduit joints. It shall be as specified orsupplied by the conduit manufacturer, or both.7. Test Specimens7.1 Specimens shall be co
20、mprised of a conduit bell with anelastomeric seal.7.2 Specimens shall have no less than 1 in. (25 mm) and nomore than 3 in. (76 mm) of nominal conduit diameter extend-ing past the bottom of the bell shoulder (see Fig. 1).7.3 The bottom of each specimen (spigot end) shall be cutperpendicular to the a
21、xis of the bell barrel within 61 (see Fig.1).7.4 Bell dimensions and specifications shall be determinedby the bell manufacturer, but the specimens shall be represen-tative of normal and customary production by the manufac-turer.7.5 Test specimens can have any standard wall thickness. Itis not necess
22、ary to test more than one wall thickness pernominal conduit size.7.6 Number of Test SpecimensThere shall be eight speci-mens to be tested for each design of gasketed conduit joiningsystem and nominal conduit size.8. Conditioning8.1 Condition specimens, spigot mandrels, and joint lubri-cant for at le
23、ast 8 h in air at a temperature of 73 6 7F (23 64C) prior to testing. Begin testing immediately after condi-tioning period.8.2 Conduct the testing in a room maintained at the condi-tioning temperature.9. Procedure9.1 Select eight bell specimens of the same nominal sizewhich have been prepared and co
24、nditioned according toSections 7 and 8 of this test method.9.2 Mark the specimens with consecutive numbers, startingwith “1” and ending with “8.”9.3 Rigidly mount the proper spigot mandrel for the nomi-nal size of conduit being tested to the compression tester.9.4 Mark specimen number and type on ch
25、art recorder paperto identify the force tracing that will be recorded.9.5 Position compression arms of the compression tester toprovide a gap between the spigot mandrel and the bellspecimen such that access to the spigot mandrel and bellspecimen is easily achieved.9.6 Stir the joint lubricant to rem
26、ix any separation that mayhave occurred.9.7 Using a paint brush or sponge, apply the joint lubricantto the gasket and spigot mandrel. Make sure to cover the entirecontact surface of the gasket and halfway to the depth-of-insertion line on the spigot mandrel, leaving no dry spots. Alsobe sure that th
27、e entire surface of the chamfer on the spigotmandrel is covered.NOTE 1As a guide, the approximate thickness of the lubricant filmshould be between132 in. (0.8 mm) and116 in. (1.6 mm).9.8 Position the bell specimen on the compression testerwith the bell entrance pointing towards the spigot mandrel.9.
28、9 Using the compression tester controls, slowly close thedistance between the spigot mandrel and bell specimen untilthe spigot mandrel is approximately14 in. (6.4 mm) from theentrance of the bell specimen.9.10 Manipulate the position of the bell specimen whileslowly bringing the spigot mandrel and t
29、he bell specimentogether such that the spigot mandrel enters the lip of the bell.Stop when about14 in. (6.4 mm) of the spigot mandrel is insidethe bell.9.11 Set the rate of compression on the compression testerto 20 in./min (500 mm/min).9.12 Arrange the controls of compression tester such thatthe co
30、mpression travel stops before the spigot mandrel bottomsout in the bell specimen.9.13 Activate the compression and chart recorder simulta-neously.9.14 When compression stops (see 9.12), deactivate thechart recorder and return the compression tester to a position atwhich the bell specimen can be with
31、drawn from the spigotmandrel.NOTE 2If the bell specimen is difficult to remove from the spigotmandrel, it may be necessary to mechanically restrain the bell specimenand allow the compression tester to withdraw the spigot mandrel from thebell specimen when the compression tester is retracted.FIG. 1 B
32、ell Specimen PreparationF 1429 99 (2005)29.15 Remove the bell specimen.9.16 Clean the lubricant from the spigot mandrel in prepa-ration for the next test specimen.9.17 Repeat 9.4 through 9.16 until all eight specimens havebeen tested.9.18 From the chart recorder tracings, find and record themaximum
33、force encountered during joint assembly for each ofthe eight specimens tested. See X1for an example of a chartrecorder tracing.9.19 If other sizes of conduit are to be tested, repeat 9.1through 9.18.10. Calculation10.1 Express the results of the tests of the eight specimensin terms of a sample mean
34、and sample standard deviation inaccordance with the following:10.1.1 Calculate the sample mean of the sample peakassembly force results as follows:x 5(i51nxin(1)where:x = mean of sample of eight peak assembly force readings,xi= individual value of peak assembly force from speci-men “i” in sample, an
35、dn = number of specimens in sample (eight in this case).10.1.2 Calculate the standard deviation of the sample peakassembly force results as follows:s 5(i51nxi x!2n 1(2)where:s = standard deviation of sample of eight peak assemblyforce readings,xi= individual value of peak assembly force from speci-m
36、en “c” in sample,x = mean of sample of assembly force readings (calculatedin 10.1.1), andn = number of specimens in sample (eight in this case).11. Report11.1 A test report will be generated for each group of eightspecimens tested.11.2 Report the following information:11.2.1 The chart recorder assem
37、bly force tracings,11.2.2 The peak assembly force sample mean and standarddeviation calculated in Section 10,11.2.3 Identification of the bell specimens tested, includingnominal size, type of conduit, material of manufacture, typeand source of gasket, and name of bell specimen manufacturer,11.2.4 Id
38、entification of the joint lubricant used, includingname of the lubricant manufacturer and the model number, ifappropriate,11.2.5 Manufacturing drawings of the spigot mandrel usedin the test, including the spigot chamfer specifications,11.2.6 Date(s) of testing,11.2.7 Location of testing,11.2.8 Name(
39、s) of personnel conducting the test, and11.2.9 Comments, if appropriate.12. Precision and Bias12.1 PrecisionWork is in progress to develop precisiondata. This work is in the form of interlaboratory testing.12.2 BiasBias is a systematic error which contributes tothe difference between a test result a
40、nd a true (or reference)value. There are no recognized standards on which to base anestimate of bias for this test method.13. Keywords13.1 assembly force; compression tester; elastomeric seal;gasketed conduit; spigot mandrelF 1429 99 (2005)3ANNEX(Mandatory Information)A1. SPIGOT MANDREL SPECIFICATIO
41、NSA1.1 Fig. A1.1 shows spigot mandrel specifications.FIG. A1.1 Spigot Mandrel SpecificationsF 1429 99 (2005)4APPENDIX(Nonmandatory Information)X1. EXAMPLE OF TYPICAL JOINT ASSEMBLY FORCE TEST RESULTX1.1 The graph in Fig. X1.1 is an example of a force versustime plot during an assembly of a gasketed
42、pipe or conduitjoint. In this example, force is expressed in terms of percent offull scale and time is read from right to left.X1.2 The significant“ events” on the force versus time plothave been labeled with the letters“ A” through “E.” Thefollowing explains what is happening at these points:X1.2.1
43、 AThis shows the spigot mandrel beginning itstravel and before it has reached the gasket.X1.2.2 BThis shows the peak force generated as themandrel compresses the gasket primary seal.X1.2.3 CThis shows another force generated as the man-drel compresses a gasket protrusion located behind the primaryse
44、al.X1.2.4 DThis shows a force drop-off when the mandreltravel is halted at the preset stop position.X1.2.5 EThis shows the pen returning to the zero forceposition to be ready for the next test.X1.3 This graph is only an example. There is a wide varietyof shapes that assembly force tracings can assum
45、e, dependingon the type of gasket tested. Regardless of the shape of thetracing, the peak force (event “B” in this case) is what shouldbe recorded for purposes of this test method.F 1429 99 (2005)5ASTM International takes no position respecting the validity of any patent rights asserted in connectio
46、n 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 by the responsible
47、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 receive careful consid
48、eration 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 International, 100 Bar
49、r Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).FIG. X1.1 Example of a Force Versus Time Plot During anAssembly of a Gasketed Pipe or Conduit JointF 1429 99 (2005)6
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