ASTM D2527-83(2017) Standard Specification for Rubber Seals—Splice Strength.pdf

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1、Designation: D2527 83 (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 nu

2、mber 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 the strength and appearance ofthe splice in vulcanized rubber-seal material of any size, type,or cross-sectiona

3、l shape.1.2 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-strengt

4、h splice,although 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

5、be agreed upon by thepurchaser 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

6、 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.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard

7、-ization established in 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 Therm

8、oplas-tic ElastomersTension3. 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

9、-strength splice, or for moderate 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 aco

10、mposition conducive to extra-high-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 specificatio

11、n as aguide.3.2 In the event that an 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

12、 tested in accordance with the procedure outlinedin Section 7, the splice shall meet the following requirements:Class 1 Class 2 Class 3AUltimate elongation for the sealarea, %20 50 100AIn qualitative nondestructive test, Class 3 seals shall also meet the requirementsin 7.2.3 and 7.2.4.6. Significanc

13、e and Use6.1 These tests are used quantitatively, 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 responsibili

14、ty of Subcommittee D11.37on Coated Fabrics, Rubber Threads 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.a

15、stm.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 Conshohocken, PA 19428-2959. United StatesThis inte

16、rnational standard was developed in accordance with internationally 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) Co

17、mmittee.17. 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 permit it, prepareelongation spe

18、cimens in accordance with Test Methods D412in such a manner that the splice area shall fall within the testarea (Dimension L of Fig. 2, Test Methods D412). When abias-cut splice is made, cut the elongation specimen from theseal in such a manner that the “line of splice” shall run straightacross the

19、test specimen and perpendicular to the edges of thewidth of the test specimen (Dimension L of Fig. 2, TestMethods D412).7.1.3 In the event that the seal cross section is too small toprepare a suitable standard specimen, employ the same methodnormally used to establish the ultimate tensile and elonga

20、tionof the seal to establish the elongation of the splice.7.2 Qualitative Nondestructive Test:7.2.1 For a nondestructive type test such as used forproduction quality control, stretch the spliced area of the sealitself. Determine the elongation of the joints by measuring theseparation of two marks pl

21、aced 75 mm (3 in.) apart with thesplice in the center of the marked area.7.2.2 The minimum required elongation for the nondestruc-tive seal test shall be as indicated in Section 5, or on the partprint.7.2.3 Class 3 seals while elongated 100 % shall be rotated inthe splice area for a minimum of 180 i

22、n each direction.7.2.4 Class 3 seals in the unstretched splice area shall besubjected to bend testa maximum of 270 and a minimum of180. The rod diameter used to bend the gasket shall be equalto the cross-sectional diameter of the gasket.8. Precision and Bias8.1 A precision and bias statement is not

23、necessary for thisspecification as it is a listing of material quality criteria.9. Keywords9.1 rubber seals; splice strengthASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are exp

24、ressly 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 years andif not revis

25、ed, 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 committee, which you may

26、 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 Stat

27、es. 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 83 (2017)2