1、Designation: D6909 10Standard Specification forHigh Temperature and Acid-Resistant FluorocarbonTerpolymer Elastomer1This standard is issued under the fixed designation D6909; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 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.1. Scope1.1 This specification covers requirements for the fluorocar-bon terpolymer elastomer used in the manufacture of expan
3、-sion joints for use in coal-fired utilities and other hightemperature industrial applications in which corrosive fluegases are present.1.2 This specification is intended as a reference procedurefor evaluating the performance of these vulcanizates and canalso be used for quality assurance testing be
4、fore release of a lotbased on agreement between supplier and purchaser.1.3 The values stated in SI units are to be regarded asstandard. The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It
5、 is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards:2D297 Test Methods for Rubber ProductsChemicalAnaly-sisD412 Test Methods for Vul
6、canized Rubber and Thermo-plastic ElastomersTensionD471 Test Method for Rubber PropertyEffect of LiquidsD573 Test Method for RubberDeterioration in an AirOvenD1765 Classification System for Carbon Blacks Used inRubber ProductsD2240 Test Method for Rubber PropertyDurometerHardness3. Ordering Informat
7、ion3.1 The seller shall mention this specification number in allquotations and when acknowledging purchase order.4. Materials and Manufacture4.1 Material shall be based on 100 % virgin fluoroelastomerterpolymer of at least 68 % by weight of fluorine content. Thecompound shall contain no less than 70
8、 % by weight offluoroelastomer. The remaining 30 % by weight shall becomprised of Medium Thermal (MT) carbon black, Classifi-cation N 990 (in Classification D1765), as reinforcing filler. Nomineral fillers shall be used. The fluoroelastomer curative shallbe of the bisphenol (dihydroxy), or peroxide
9、types. No amountof reprocessed fluoroelastomer scrap or nonfluoroelastomerpolymer is acceptable.4.2 As-received virgin fluroelastomer sampled in accor-dance with Section 6 shall be fully press-cured, typically for 20min at 150C (302F), but not post-cured. Other time/temperature conditions are accept
10、able providing they producevulcanizates that meet the property requirements.5. Physical Properties5.1 The mean value of the individual samples shall meet thephysical and chemical property requirements shown in Table 1.5.2 A sample shall be exposed to 260 6 3C (500 6 5F)for 70 6 0.5 h per Test Method
11、 D573 and conform with thefollowing property change requirements to determine dry heatresistance:Hardness Change 610 pointsTensile Strength Change +50 % maxElongation Ultimate 225 % minWeight Change 67 % max5.3 The material color shall be black.6. Sampling6.1 Sampling and testing shall be as follows
12、:6.1.1 For acceptance tests, sufficient product shall be takenat random from each lot to perform all required tests. Thenumber of samples tested per lot shall be no less than three.1This specification is under the jurisdiction ofASTM Committee D11 on Rubberand is the direct responsibility of Subcomm
13、ittee D11.37 on Coated Fabrics, RubberThreads and Seals. This specification was developed in cooperation with the FluidSealing Assocation (Specification FSA-DSJ-401-09).Current edition approved May 1, 2010. Published June 2010. Originallyapproved in 2003. Last previous edition approved in 2003 as D6
14、909 03. DOI:10.1520/D6909-10.2For 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.1Copyright ASTM International, 1
15、00 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.2 ASTM International test specimens shall be preparedfrom the same batch of polymer/compound as the materialbeing supplied and shall be fully press-cured as specified in4.2.6.1.3 A lot is all compound processed in
16、 one continuous runand presented to the purchaser at one time.6.1.4 Abatch is the quantity of compound run through a millor mixer at one time.6.1.5 The seller shall use ingredients and manufacturingprocesses on specification test samples that are essentially thesame as those on the approved product.
17、7. Number of Test and Retests7.1 Acceptance TestsThe seller of the expansion jointshall be responsible for checking the batch sample test results,confirming that the results are in accordance with this specifi-cation, and preparing the “Batch Test Certification” report. Thebuyer reserves the right t
18、o perform confirmatory tests asdeemed necessary to ensure that the product conforms to the“Batch Test Certification” and the full requirements of thisspecification.7.1.1 Acceptance tests shall cover the following properties:7.1.1.1 Hardness, as received (see Table 1);7.1.1.2 Tensile strength, as rec
19、eived (see Table 1);7.1.1.3 Elongation, as received (see Table 1);7.1.1.4 Specific gravity, as received (see Table 1);7.1.1.5 Volume Swell Methanol (see Table 1);7.1.1.6 Volume Swell Toluene (see Table 1); and7.1.1.7 Heat aging, as received (see 5.2).7.1.2 Shipments and certification with test value
20、s fromacceptance tests in 7.1.1 shall include traceability back topolymers, grade, and lot number.7.2 Preproduction TestsTests for all technical require-ments are preproduction tests and shall be performed initiallyand just prior to shipment of the expansion joints to the buyer,or when a change of i
21、ngredients or processing or both requiresreapproval or when the buyer deems confirmatory testing isrequired.8. Inspection8.1 The seller of the expansion joints shall be responsiblefor preparation of all batch test samples, conducting all therequired specification tests, and providing the test data.
22、Thebuyer reserves the right to obtain additional batch samples andperform all confirmatory testing necessary to ensure theproduct conforms to the full requirements of this specification.9. Certification9.1 The seller shall furnish with each shipment a reportshowing the test results on each lot so th
23、at conformance toacceptance requirements can be determined. Documentationmust include traceability back to polymer type, supplier, andsuppliers lot number.10. Quality Assurance10.1 The product, as received, shall be uniform in qualityand condition, smooth, as free from foreign materials ascommercial
24、ly practical, and free from imperfections detrimen-tal to use as intended.11. Keywords11.1 expansion joints; fluorocarbon terpolymer elastomer;fluoroelastomerASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standa
25、rd. 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 must be reviewe
26、d 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 theresponsible
27、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 C700, West Consh
28、ohocken, 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). Permission rights to p
29、hotocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 PropertiesProperty Requirement Test MethodsHardness, DurometerShore “A” or equivalent77 6 5 D2240Tensile strength, min 7.0 MPa (1015 psi) D412Elongation, min 275 % D412Specific gravity 1.86 6 0.04 D297Volume Swell - Methanol 30 % max D471 70 6 0.5hat236 3CVolume Swell - Toluene 10 % max D471 70 6 0.5hat236 3CD6909 102
