1、Designation: D2527 83 (Reapproved 2011)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.2. Referenced Documents2.1 ASTM Standards:2D412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTen
7、sion3. 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 fo
8、r 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 acomposition conducive to
9、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 specification as aguide.3.2 In the
10、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 tested in accordance w
11、ith 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 require-ments in 7.2.3 and 7.2.4.6. Significance and Use6.1 These te
12、sts are used quantitatively, for evaluation, ap-proval, and as a referee method. Also these tests are usedqualitatively for quality control purposes.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 e
13、valuation, approval, andas a referee method in the event of a dispute.7.1.2 When the dimensions of the seal permit it, prepareelongation specimens in accordance with Test Methods D4121This specification is under the jurisdiction ofASTM Committee D11 on Rubberand is the direct responsibility of Subco
14、mmittee D11.37 on Coated Fabrics, RubberThreads and Seals.Current edition approved Nov. 1, 2011. Published January 2012. Originallyapproved in 1966. Last previous edition approved in 2006 as D2527 83 (2006).DOI: 10.1520/D2527-83R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org
15、, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.in such a mann
16、er 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 test specimen and perpendicular to the edges of thewidth
17、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 elongationof the seal to establish the elongation of the splice
18、.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 placed 75 mm (3 in.) apart with thesplice in the center of
19、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 in each direction.7.2.4 Class 3 seals in the unstretched s
20、plice 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 necessary for thisspecification as it is a listing of mat
21、erial 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 expressly advised that determination of the validity of any
22、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 revised, either reapproved or withdrawn. Your comments are inv
23、ited 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 attend. If you feel that your comments have not received
24、 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 States. Individual reprints (single or multiple copies) of th
25、is 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/).D2527 83 (2011)2
