1、Designation: C 564 08Endorsed by theCast Iron Soil Pipe InstituteStandard Specification forRubber Gaskets for Cast Iron Soil Pipe and Fittings1This standard is issued under the fixed designation C 564; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This s
3、pecification covers preformed rubber gaskets usedto seal joints in cast iron soil pipe and fittings.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
4、 independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 The following safety hazards caveat pertains only to thetest methods section of this specification: This standard doesnot purport to address all of the safety concerns, if any,associa
5、ted with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.1.4 The committee with jurisdiction over this standard is notaware of another comparable standard for mater
6、ials covered inthis standard.2. Referenced Documents2.1 ASTM Standards:2A 644 Terminology Relating to Iron CastingsD 395 Test Methods for Rubber PropertyCompressionSetD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 471 Test Method for Rubber PropertyEffect of LiquidsD
7、573 Test Method for RubberDeterioration 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 224
8、0 Test Method for Rubber PropertyDurometerHardness2.2 Other DocumentsRMA Class 3 Dimensional Tolerances, RMA Manual33. Terminology3.1 DefinitionsFor definitions of terms in this standard seeTerminology C 717.3.2 Definitions of Terms Specific to This Standard:3.2.1 flashthe excess material protruding
9、 from the surfaceof a molded article at the mold junction.3.2.2 virgin rubber, na term that may be used inter-changeably with raw rubber (raw thermoset elastomer). Arubber or thermoset elastomer that has not had any additionalwork, diluents incorporated, processes performed on it, or anycombination
10、thereof. A rubber that is in an unmodified state orone in which no attempt has been made to alter it in any fashionas received from the manufacturer or supplier.4. Materials and Manufacture4.1 Gaskets shall be made of a properly vulcanized virgincompound containing virgin rubber as the sole elastome
11、r withno scrap or reclaim.5. Physical Requirements Physical Requirements5.1 Sample gaskets selected as specified in Section 8 shallconform to the requirements for physical properties listed inTable 1 when tested in accordance with the methods specifiedin Section 9.6. Dimensions and Permissible Varia
12、tions6.1 Gaskets shall conform to the dimensions specified bythe manufacturer.6.2 All cross-sectional dimensions shall have an RMAClass3 tolerance as shown in Annex A1, and all diametral dimen-sions shall have a tolerance of 6 1 percent.1This specification is under the jurisdiction of ASTM Committee
13、 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. Published November 2008. Originallyapproved in 1965. Last previous edition approved in 2003 as C 564 03a.2For referenced ASTM stand
14、ards, 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.3Rubber Manufacturers Association, 1400 K Street NW, No. 900, Washington,DC 20005 2455,
15、 http:/www.rma.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Workmanship7.1 The surface of the gasket shall be smooth and free ofpitting, cracks, blisters, air marks, and any other imperfectionsthat will affect its behavior
16、in service. The body of the gasketshall be free of porosity and air pockets.7.2 Neither the flash thickness nor the flash extension shallexceed 0.8 mm (132 in.), at any point on the sealing ring.7.3 The offset, or failure of the mold to register accurately,shall not exceed 0.4 mm (164 in.).8. Sampli
17、ng8.1 For each of the tests, gaskets shall be selected at randomas required by the method of test specified.9. Test Methods9.1 HardnessThe gasket material shall be tested forhardness in accordance with ASTM Test Method D 2240. TestMethod D 1415 shall be used as the referee method. Hardnessmeasuremen
18、ts shall be made on specimens prepared in accor-dance with 9.2. However, hardness readings for guidancepurposes shall be permitted to be taken directly on the gasket,recognizing that these readings may vary slightly from thosetaken on the dumb-bell specimens.9.2 Elongation and Tensile Strength The g
19、asket materialshall be tested for elongation and tensile strength in accordancewith Test Methods D 412. Standard ASTM Type C dumb-bellspecimens conforming to Fig. 1 (Apparatus for Tensile SetTest) of Test Methods D 412 shall be cut from a section of thegasket for this test. To obtain a uniform thick
20、ness, these gasketsections shall be permitted to be buffed prior to cutting intodumb-bell specimens, so as to produce a finely ground surfacewithout cuts or burns.9.3 Tear Strength The gasket material shall be tested fortear strength in accordance with Test Method D 624 using DieC.9.4 Compression Se
21、t The gasket material shall be testedfor compression set in accordance with Test Methods D 395using Method B. Specimens shall be aged in an oven for 22 hat 70 6 1C (158 6 2F). Where plied specimens arenecessary, the results shall comply with the requirements ofTable 1.9.5 Heat AgingThe gasket materi
22、al shall be tested foreffects of heat aging in accordance with 9.2, and shall be agedfor96hat706 1C (158 6 2F). Hardness measurementsshall be made as specified in 9.1.9.6 Water AbsorptionThe gasket material shall be testedfor weight increase due to water absorption in accordance withTest Method D 47
23、1. If a 25.4-mm (1-in.) specimen cannot becut from the sample gasket, the greatest width obtainable shallbe used. The test specimen shall be immersed in distilled waterat 70 6 1C (158 6 2F) for 7 days.9.7 Ozone ResistanceThe gasket material shall be testedfor ozone resistance in accordance with Test
24、 Method D 1149,using specimens and procedure specified under Method B. Theozone concentration shall be 150 parts/100 000 000 of air byvolume. Specimens shall be aged 100 6 1h at 40 6 1C (1046 2F). A two-power hand magnifying glass shall be used toexamine the gasket for cracks.9.8 Oil Immersion The g
25、asket material shall be tested forvolume decrease due to oil absorption in accordance with TestMethod D 471. If a 25.4 mm (1-in.) specimen cannot be cutfrom the sample gasket, the greatest width obtainable shall beused. The test specimen shall be immersed in IRM 903 for 706 0.7 h at 100 6 1C (212 6
26、2F).10. Certification10.1 When specified in the purchase order or contract, thepurchaser shall be furnished certification stating samples rep-resenting each lot have been tested and inspected as indicatedin this specification and the requirements have been met. Whenspecified in the purchase order or
27、 contract, a report of the testresults shall be furnished.11. Marking11.1 Mark each gasket with clearly legible letters notexceeding 6.35 mm (14 in.) in height. These markings shallinclude the gasket manufacturers name or symbol, the pipesize and class (such as NH for no hub, SV for service, XH fore
28、xtra heavy), country of origin and the ASTM specificationdesignation. Rubber Compression gaskets shall be required tohave the year of manufacture in addition to the other requiredmarkings of this section.TABLE 1 Physical Requirements of GasketsProperty Requirements ASTM Test MethodHardness (nominal
29、durometer 65) as specified by thepipe manufacturer50 60 70 D 2240Elongation, min, % 350 300 250 D 412Tensile strength, min, MPa 10 10 10 D 412(psi) (1500) (1500) (1500)Tear strength, min, N/cm 268 268 268 D 624(lbf/in.) (150) (150) (150)Compression set, max, % 25 25 25 D 395Heat aging, 96 h at 70 6
30、1C (158 6 2F): D 573Hardness increase, max, durometer points 10 10 10 .Loss in tensile strength, max,% 15 15 15 .Loss in elongation, max, % 20 20 20 .Water absorption: D 471Weight increase, max, % 20 20 20 .Ozone resistance no cracks no cracks no cracks D 1149Oil immersion:Volume increase, max, % 80
31、 80 80 D 471C56408212. Keywords12.1 cast iron; fittings; gaskets; pipe; rubberANNEX(Mandatory Information)A1. RUBBER MANUFACTURERS ASSOCIATION, INC. TOLERANCESSee Table A1.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mention
32、edin 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
33、 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 meeting of
34、 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, PO Box
35、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).TABLE A
36、1.1 RMA Class 3 Dimensional Tolerances (Commercial Tolerances)Size, mm, (in.) FixedAClosureB,C0 to 12.67 (0 to 0.499) 60.254 (60.010) 60.381 (60.015)12.7 to 25.37 (0.500 to 0.999) 60.254 (60.010) 60.457 (60.018)24.4 to 50.77 (1.000 to 1.999) 60.381 (60.015) 60.508 (60.020)50.8 to 76.17 (2.000 to 2.9
37、99) 60.508 (60.020) 60.635 (60.025)76.2 to 101.57 (3.000 to 3.999) 60.635 (60.025) 60.762 (60.030)101.6 to 126.97 (4.000 to 4.999) 60.762 (60.030) 60.889 (60.035)127.0 to 203.17 (5.000 to 7.999) 60.889 (60.035) 61.27 (60.050)Greater than 203.2 (Greater than 8.000) multiply by 1.27 (0.0050)AFixed dim
38、ensions are those that are parallel to the mold parting line or major mold sections and that are not affected by flash thickness variations. Tolerances applyindividually to each fixed dimension according to its own size.BClosure dimensions are those vertical to the mold parting line or parting lines of major sections and are affected by flash thickness variation.CThe tolerance on closure dimensions is that tolerance for the largest closure dimension. This tolerance is then applied to all other closure dimensions.C564083
