1、Designation: C1440 08 (Reapproved 2013)Standard Specification forThermoplastic Elastomeric (TPE) Gasket Materials for Drain,Waste, and Vent (DWV), Sewer, Sanitary and StormPlumbing Systems1This standard is issued under the fixed designation C1440; the number immediately following the designation ind
2、icates 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 () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers thermoplastic e
3、lastomeric(TPE) gasket materials for preformed elastomeric gaskets usedin shielded and non-shielded mechanical couplings. Thesecouplings are used in gravity flow drain, waste and vent(DWV), sewer, sanitary and storm plumbing systems. Theyinclude couplings to join similar and dissimilar piping sizesa
4、nd material.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conf
5、ormancewith the 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 the applica-bility of regulatory limitations pri
6、or to use.2. Referenced Documents2.1 ASTM Standards:2A644 Terminology Relating to Iron CastingsD395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD471 Test Method for Rubber PropertyEffect of LiquidsD573 Test Method for Rub
7、berDeterioration in an AirOvenD624 Test Method for Tear Strength of Conventional Vul-canized Rubber and Thermoplastic ElastomersD1149 Test Methods for Rubber DeteriorationCracking inan Ozone Controlled EnvironmentD1415 Test Method for Rubber PropertyInternationalHardnessD2240 Test Method for Rubber
8、PropertyDurometer Hard-nessD5964 Practice for Rubber IRM 901, IRM 902, and IRM903 Replacement Oils forASTM No. 1, ASTM No. 2, andASTM No. 3 Oils3. Terminology3.1 DefinitionsRefer to Terminology A644 for definitionsof the following terms used in this specification elastomer,elastomeric, elongation, g
9、asket, hardness, preformed gasket-(see gasket), thermoplastic elastomer.4. Materials and Manufacture4.1 Gaskets shall be made of virgin thermoplastic elasto-meric compound containing only clean reworked thermoplasticelastomer material from the manufacturers own production ofthe same compound.4.2 Whe
10、re splices are made in the gasket, the strength of thesplice shall be such that the gasket will withstand the stretchtest described in 8.9 with no visible separation or peeling.4.3 Many thermoplastic elastomeric materials (TPE) aretemperature sensitive. Designed operating temperature rangefor the 87
11、 Shore A TPE materials is 0 to 130 F (18 to55C). These materials are not designed or intended forprolonged operation outside this range.5. Physical Properties5.1 Gaskets representative of the manufacturers productionshall be selected as specified in Section 7 and shall conform tothe requirements for
12、 physical properties listed in Table 1 whentested in accordance with the methods specified in Section 8.6. Workmanship, Finish, and Appearance6.1 The surface of the gasket shall be smooth and free ofpitting, cracks, blisters, air marks, and any other imperfectionsthat will affect its behavior in ser
13、vice. The body of the gasketshall be free of porosity and air pockets.1This Specification is under the jurisdiction of ASTM Committee A04 on IronCastings and is the direct responsibility of Subcommittee A04.75 on Gaskets andCoupling for Plumbing and Sewer Piping.Current edition approved May 1, 2013.
14、 Published May 2013. Originallyapproved in 1999. Last previous edition approved in 2008 as C1440 08. DOI:10.1520/C1440-08R13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information,
15、refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16.2 Neither the flash thickness nor the flash extension shallexceed 1/32 in. (0.8 mm), at any point on the ring.6.3 The of
16、fset, or failure of the mold to register accurately,shall not exceed 1/64 in. (0.4 mm).7. Sampling7.1 For the stretch test specified in 8.9, sample gaskets shallbe selected at random from each shipment of gaskets. For eachof the other tests, gaskets shall be selected at random asrequired by the meth
17、od of test specified.8. Test Methods8.1 HardnessTest the gasket material for hardness inaccordance with Test Method D2240. As required, use TestMethod D1415 as the referee method. Make hardness measure-ments on specimens prepared in accordance with 8.2.However, hardness readings for guidance purpose
18、s shall betaken directly on the gasket, recognizing that these shall bepermitted to vary slightly from those taken on the dumbbellspecimens.8.2 Elongation and Tensile StrengthTest the gasket mate-rial for elongation and tensile strength in accordance with TestMethod D412. Cut standard ASTM Type C du
19、mbbell speci-mens conforming to Fig. 1 (Apparatus for Tensile Set Test) ofTest Method D412 from sections of the gasket for this test. Toobtain a uniform thickness, these sections shall be permitted tobe buffed prior to cutting into dumbbell specimens, so as toproduce a finely ground surface without
20、cuts or burns.8.3 Tear StrengthTest the gasket material for tear strengthin accordance with Test Method D624 using Die C.8.4 Compression SetTest the gasket material for compres-sion set using Test Method D395. For materials with a hardnessof 90 IRHD or higher Method A must be used. For materialswith
21、 a hardness less than 90 IRHD Method B must be used.Oven age samples for 22 h at 70 6 1C (158 6 2F). Whenusing Test Method A, there shall be a maximum dimensionalchange of 12 %. When using Test Method B, there shall be amaximum dimensional change of 25 %.8.5 Heat AgingTest the gasket material for he
22、at aging inaccordance with Test Method D573. Prepare specimens inaccordance with 8.2, and for 96 h at 70 6 2 C (158 6 4F).Make hardness measurements as specified in 8.1.8.6 Water AbsorptionTest the gasket material for weightincrease due to water absorption in accordance with TestMethod D471. If a 1
23、in. (25.4 mm) specimen cannot be cutfrom the sample gasket, use the greatest width obtainable.Immerse the test specimen in distilled water at 70 6 2C (1586 4F) for seven days.8.7 Ozone ResistanceTest the gasket material for ozoneresistance in accordance with Test Method D1149, usingspecimens and pro
24、cedure specified under Method B. The ozoneconcentration shall be 150 pphm of air by volume. Agespecimens 100 h at 40 6 2C (104 6 4F) with a 20 %extension. Use a two-power hand magnification glass toexamine the gasket8.8 Oil ImmersionTest the gasket material for volumedecrease due to oil absorption i
25、n accordance with Test MethodD471. If a 1-in. (25.4 mm) specimen cannot be cut from thesample gasket, use the greatest width obtainable. The testspecimen shall be immersed in IRM 903 oil for 70 h at 100 62C (212 6 4F).8.9 Stretch Test for Spliced GasketsStretch gaskets untilthe circumference is incr
26、eased by 50 %, then visually inspectfor defects as described in 4.2 and 6.1. One percent of the totalspliced gaskets shall be tested with no failures.9. Certification9.1 When specified in the purchase order or contract, thepurchaser shall be furnished certification stating samples rep-resenting each
27、 lot have been tested and inspected as indicatedin this specification and the requirements have been met. Whenspecified in the purchase order or contract, a report of the testresults shall be furnished.10. Marking10.1 Each gasket shall be permanently marked with clearlylegible letters. These marking
28、s shall include the gasket manu-facturers name or registered trademark, the pipe size and class,the country of origin, and the ASTM standard specificationdesignation.TABLE 1 Physical Requirements of Gasket MaterialsProperties TestedASTM TestMethodTPEAHardness, Shore A (5 pts) D2240 87 (5 s Delay)Elo
29、ngation, min, % D412 250Tensile Strength, min. psi (kPa) D412 1500 (10 342)Heat Aging D57396 h at 70 2C (1584F)Hardness increase, max, pts. Shore A 10Loss in tensile strength, max, % 15Loss in elongation, max, % 20Tear Strength, min. lbf/in (N/cm) D624 150(268)Water Absorption D4717 days at 70 2C(15
30、8 4F)Weight increase, max % 20Ozone Resistance D1149 No cracks100 h at 40 2C (104 4F)Ozone Concentration 150 pphm20 % ExtensionCompression Set, max % D395 1222 h at 70 1C (158 2F) Method AOil Immersion in IRM 903 Oil D47170 h at 100 2C (212 4F)Max Volume Increase, % 80Max Volume Decrease, % 15ADesig
31、ned operating temperature for Shore A TPE materials is 0 to 130F (18to 55C). These materials are not designed or intended for prolonged operationoutside this range.C1440 08 (2013)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item m
32、entionedin 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 technical committ
33、ee 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 consideration at a meet
34、ing 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 Barr Harbor Drive, P
35、O 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C1440 08 (2013)3
