1、Designation:D252783(Reapproved 2017)Standard Specification forRubber SealsSplice Strength1This standard is issued under the fixed designation D2527;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in
2、 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 the strength and appearance ofthe splice in vulcanized rubber-seal material of any size,type,or cross-sectional shape.1.2
3、Many types and varieties of seals are used in services ofall degrees of severity.In some instances,hollow tubing isspliced and used as a seal.It is also possible to have seals ofirregular cross sections,or made of polymers which,due totheir nature,or not conducive to a high-strength splice,although
4、they will perform satisfactorily in their intendedapplication.1.3 Seals are exposed in service to a wide variety of mediaat various temperatures.The effect of such media on the splicedarea must be considered.Details of the test procedures toevaluate the effect of the media shall be agreed upon by th
5、epurchaser and seller as part of the purchase contract.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsib
6、ility 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.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in
7、the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTension3
8、.Classification3.1 In order to provide for the various types of seals andrequirements,three classes of splices have been established:3.1.1 Class 1 covers splices in seals not having a solid crosssection but an irregular cross section,of a polymer notconducive to a high-strength splice,or for moderat
9、e servicerequirements.3.1.2 Class 2 covers splices in solid seals of a shape andcomposition conducive to high-strength splices.This classcovers applications requiring high-splice strength or servicerequirements.3.1.3 Class 3 covers splices in round solid seals of acomposition conducive to extra-high
10、-strength splices.Thisclass covers applications requiring extra-high-splice tensile andbend strength due to difficult service requirements.Class 3tests of seals in other than round shapes shall be agreed uponby the purchaser and manufacturer using this specification as aguide.3.2 In the event that a
11、n application requires special consid-eration and values,these values can be indicated on the partprint,using this specification as a guide.4.Workmanship4.1 Upon visual inspection,the splice shall not show anysigns of separation.5.Physical Requirements5.1 When tested in accordance with the procedure
12、 outlinedin Section 7,the splice shall meet the following requirements:Class 1Class 2Class 3AUltimate elongation for the sealarea,%2050100AIn qualitative nondestructive test,Class 3 seals shall also meet the requirementsin 7.2.3 and 7.2.4.6.Significance and Use6.1 These tests are used quantitatively
13、,for evaluation,approval,and as a referee method.Also these tests are usedqualitatively for quality control purposes.1This specification is under the jurisdiction ofASTM Committee D11 on Rubberand Rubber-like Materials and is the direct responsibility of Subcommittee D11.37on Coated Fabrics,Rubber T
14、hreads and Seals.Current edition approved May 1,2017.Published July 2017.Originally approvedin 1966.Last previous edition approved in 2011 as D2527 83(2011).DOI:10.1520/D2527-83R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.F
15、or 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 Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally
16、recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 7.Test Methods7.1 Quantitative Destructive Test:7.1.1 The method described herein is for a quantitative-typedestructive test to be used for relative evaluation,approval,andas a referee method in the event of a dispute.7.1.2 When the dimensions of the seal permi
