ASTM_F_477_-_14.pdf

Designation:F47714Standard Specification forElastomeric Seals(Gaskets)for Joining Plastic Pipe1This standard is issued under the fixed designation F477;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This specification covers elastomeric seals(gaskets)used to seal the joints of plastic pipe used for gravity,low-pressure,and high-pressure applications.This refers topush-on joints which require no internal or external pressure toeffect the initial seal.1.2 Requirements are given for natural or synthetic rubbergaskets,or a combination of both.1.3 The text of this specification references notes,footnotes,and appendixes which provide explanatory material.Thesenotes and footnotes(excluding those in tables and figures)shallnot be considered as requirements of the specification.1.4 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.1.5 The following precautionary caveat pertains only to thetest method portion,Section 7,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to consult and establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD471 Test Method for Rubber PropertyEffect of LiquidsD518 Test Method for Rubber DeteriorationSurfaceCracking(Withdrawn 2007)3D573 Test Method for RubberDeterioration in an AirOvenD883 Terminology Relating to PlasticsD1149 Test Methods for Rubber DeteriorationCracking inan Ozone Controlled EnvironmentD1229 Test Method for Rubber PropertyCompression Setat Low TemperaturesD1349 Practice for RubberStandard Conditions for Test-ingD1414 Test Methods for Rubber O-RingsD1415 Test Method for Rubber PropertyInternationalHardnessD1566 Terminology Relating to RubberD2240 Test Method for Rubber PropertyDurometer Hard-nessF913 Specification for Thermoplastic Elastomeric Seals(Gaskets)for Joining Plastic Pipe2.2 NSF Standards:Standard No.14 for Plastic Piping Components and RelatedMaterials4Standard No.61 for Drinking Water Systems Components-Health Effects43.Terminology3.1 DefinitionsTerms relating to rubber or elastomer shallbe as defined in Terminology D1566.Terms relating to plasticsshall be as defined in Terminology D883.3.2 Definitions of Terms Specific to This Standard:3.2.1 sealing portion of the gasketany part of the elasto-meric material that is in deformation which provides sealsbetween the bell and spigot of adjoining sections of pipe.4.Composition and Manufacture4.1 All gaskets shall be extruded or molded in such amanner that any cross section will be dense,homogeneous,andfree of porosity,blisters,pitting,or other defects that make1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.20 on Joining.Current edition approved Sept.15,2014.Published December 2014.Originallypublished as approved in 1976.Last previous edition approved in 2010 asF477 10.DOI:10.1520/F0477-14.2For 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 Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from NSF International,P.O.Box 130140,789 N.Dixboro Rd.,AnnArbor,MI 48113-0140,http:/www.nsf.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 them unfit for the use intended.The gasket shall be fabricatedfrom a high-grade elastomer material.The basic polymer shallbe natural rubber,synthetic rubber,a blend of both,or athermoplastic elastomer,meeting the requirements prescribedin Sections 5 and 6.4.2 Where a splice is used in the manufacture of the gasket,the strength shall be such that the gasket shall withstand 100%elongation over the part of the gasket which includes the splicewith no visible separation of the splice.While in a stretchedposition the gasket shall be rotated in the spliced area aminimum of 180 in each direction in order to inspect forseparation.In addition,any portion of the splice shall becapable of passing a bend test witho