1、Designation: C1440 08 (Reapproved 2013)1Standard 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 in
2、dicates 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.1NOTEEditorial changes were made throughout in Octob
3、er 2013.1. Scope1.1 This specification covers thermoplastic elastomeric(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. Theyi
4、nclude couplings to join similar and dissimilar piping sizesand material.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This sta
5、ndard 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 Documents2.1
6、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 RubberDeterioration in an AirOvenD624 Te
7、st 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 PropertyDurometer Hard-nessD5964 Prac
8、tice 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, gasket, hardness, preformed gasket-(se
9、e 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 splices are made in the gasket, th
10、e 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 A TPE materials is 0 to 130 F
11、(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 physical properties listed in Table
12、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 imperfections1This Specification is under the jurisdiction of ASTM Committee A04 on Ir
13、onCastings and is the direct responsibility of Subcommittee A04.75 on Gaskets andCoupling for Plumbing and Sewer Piping.Current edition approved May 1, 2013. Published May 2013. Originallyapproved in 1999. Last previous edition approved in 2008 as C1440 08. DOI:10.1520/C1440-08R13.2For referenced AS
14、TM 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoho
15、cken, PA 19428-2959. United States1that will affect its behavior in service. The body of the gasketshall be free of porosity and air pockets.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 mold to regis
16、ter 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. Test Methods8
17、.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 purposes shall betaken directly on the gaske
18、t, 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 dumbbell speci-mens conforming to Fig.
19、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 cuts or burns.8.3 Tear StrengthTest t
20、he 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 a hardness less than 90 IRHD Method
21、B must be used.Oven age samples for 22 h at 158 6 2F (70 6 1C). 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 heat aging inaccordance with Test Metho
22、d D573. Prepare specimens inaccordance with 8.2, and for 96 h at 158 6 4F (70 6 2 C).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 in. (25.4 mm) specimen cannot be cutf
23、rom the sample gasket, use the greatest width obtainable.Immerse the test specimen in distilled water at 158 6 4F (706 2C) for seven days.8.7 Ozone ResistanceTest the gasket material for ozoneresistance in accordance with Test Method D1149, usingspecimens and procedure specified under Method B. The
24、ozoneconcentration shall be 150 pphm of air by volume. Agespecimens 100 h at 104 6 4F (40 6 2C) 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 with Test MethodD471. If
25、 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 212 64F (100 6 2C).8.9 Stretch Test for Spliced GasketsStretch gaskets untilthe circumference is increased by 50 %, then visually inspectf
26、or 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 tested and inspected a
27、s 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 the gasket manu-factu
28、rers 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)Elongation, min, % D412 250Tensile Stren
29、gth, min. psi (kPa) D412 1500 (10 342)Heat Aging D57396 h at 158 4F (70 2C)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 158 4F (70 2C)Weight increase, max % 20Ozone
30、 Resistance D1149 No cracks100 h at 104 4F (40 2C)Ozone Concentration 150 pphm20 % ExtensionCompression Set, max % D395 1222 h at 158 2F (70 1C) Method AOil Immersion in IRM 903 Oil D47170 h at 212 4F (100 2C)Max Volume Increase, % 80Max Volume Decrease, % 15ADesigned operating temperature for Shore
31、 A TPE materials is 0 to 130F (18to 55C). These materials are not designed or intended for prolonged operationoutside this range.C1440 08 (2013)12ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of
32、 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 must be reviewed every five
33、 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 theresponsible technical co
34、mmittee, 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
35、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)13
