1、Designation: C 1440 08Standard Specification forThermoplastic Elastomeric (TPE) Gasket Materials for Drain,Waste, and Vent (DWV), Sewer, Sanitary and StormPlumbing Systems1This standard is issued under the fixed designation C 1440; the number immediately following the designation indicates the year
2、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 elastomeric(TPE)
3、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 sizesand material.1.2
4、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-conformancewith the
5、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 prior to use.2. Ref
6、erenced Documents2.1 ASTM Standards:2A 644 Terminology Relating to Iron CastingsC 395 Specification for Chemical-Resistant Resin MortarsD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 471 Test Method for Rubber PropertyEffect of LiquidsD 573 Test Method for RubberDeter
7、ioration in an AirOvenD 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Thermoplastic ElastomersD 1149 Test Methods for Rubber DeteriorationCrackingin an Ozone Controlled EnvironmentD 1415 Test Method for Rubber PropertyInternationalHardnessD 2240 Test Method for Rubber Proper
8、tyDurometerHardnessD 5964 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 TerminologyA 644 for definitionsof the following terms used in this specification elastomer,elastomeric, elongation, gasket,
9、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 Where spli
10、ces 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 Shore
11、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 physic
12、al 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 service. Th
13、e 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 Oct. 1, 2008. Publis
14、hed November 2008. Originallyapproved in 1999. Last previous edition approved in 2007 as C 1440 07.2For 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 Doc
15、ument Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.2 Neither the flash thickness nor the flash extension shallexceed 1/32 in. (0.8 mm), at any point on the ring.6.3 The offset, or failure of the m
16、old 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 method of test specified.8. T
17、est Methods8.1 HardnessTest the gasket material for hardness inaccordance with Test Method D 2240. As required, use TestMethod D 1415 as the referee method. Make hardness mea-surements on specimens prepared in accordance with 8.2.However, hardness readings for guidance purposes shall betaken directl
18、y 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 D 412. Cut standard ASTM Type C dumbbell speci-mens conf
19、orming to Fig. 1 (Apparatus for Tensile Set Test) ofTest Method D 412 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 cuts or burns.8.3 Tea
20、r StrengthTest the gasket material for tear strengthin accordance with Test Method D 624 using Die C.8.4 Compression SetTest the gasket material for compres-sion set using Test Method D 395. For materials with ahardness of 90 IRHD or higher Method A must be used. Formaterials with a hardness less th
21、an 90 IRHD Method B must beused. Oven age samples for 22 h at 70 6 1C (158 6 2F).When using Test Method A, there shall be a maximumdimensional change of 12 %. When using Test Method B, thereshall be a maximum dimensional change of 25 %.8.5 Heat AgingTest the gasket material for heat aging inaccordan
22、ce with Test Method D 573. 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 D 471. If a 1 in. (25.4 mm) spe
23、cimen 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 D 1149, usingspecimens and procedure specified
24、 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 in accordance wit
25、h Test MethodD 471. 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 increased by 50 %,
26、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 lot have been
27、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 markings shall include
28、 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 (65 pts) D 2240 87 (5 s Delay)Elongation, min,
29、 % D 412 250Tensile Strength, min. psi (kPa) D 412 1500 (10 342)Heat Aging D 57396hat706 2C (15864F)Hardness increase, max, pts. Shore A 10Loss in tensile strength, max, % 15Loss in elongation, max, % 20Tear Strength, min. lbf/in (N/cm) D 624 150(268)Water Absorption D 4717 days at 70 6 2C(158 6 4F)
30、Weight increase, max % 20Ozone Resistance D 1149 No cracks100hat406 2C (104 6 4F)Ozone Concentration 150 pphm20 % ExtensionCompression Set, max % D 395 1222hat706 1C (158 6 2F) Method AOil Immersion in IRM 903 Oil D 47170 h at 100 6 2C (212 6 4F)Max Volume Increase, % 80Max Volume Decrease, % 15ADes
31、igned operating temperature for ShoreATPE materials is 0 to 130F (18to 55C). These materials are not designed or intended for prolonged operationoutside this range.C1440082ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned
32、in 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 committee and m
33、ust 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 meeting of t
34、heresponsible 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, 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).C1440083
