1、Designation: D 6909 03Standard Specification forHigh Temperature and Acid-Resistant FluorocarbonTerpolymer Elastomer1This standard is issued under the fixed designation D 6909; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 ex
3、pan-sion joints for use in coal-fired utilities and other hightemperature industrial applications in which corrosive fluegases are present.1.2 The values stated in SI units are to be regarded asstandard. The values given in parentheses are for informationonly.1.3 This specification is intended as a
4、reference procedurefor evaluating the performance of these vulcanizates and canalso be used for quality assurance testing before release of a lotbased on agreement between supplier and purchaser.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use.
5、 It 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:D 297 Test Methods for Rubber ProductsChemicalAnalysis2D 412 Test Methods for
6、 Vulcanized Rubber and Thermo-plastic ElastomersTension2D 471 Test Method for Rubber PropertyEffect of Liq-uids2D 573 Test Method for RubberDeterioration in an AirOven2D 2240 Test Method for Rubber PropertyDurometerHardness23. Ordering Information3.1 The seller shall mention this specification numbe
7、r 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 % by weight offluoroelastomer. The remaining 30 % by we
8、ight shall becomprised of thermal carbon black as reinforcing filler withcalcium hydroxide, magnesium oxide, and minimal processingaids (5 % by weight). The fluoroelastomer curative shall be ofthe dihydroxy, bisphenol type. No amount of reprocessedfluoroelastomer scrap or nonfluoroelastomer polymer
9、is accept-able.4.2 As-received virgin fluroelastomer sampled in accor-dance with Section 6 shall be fully press-cured for 20 min at150C (302F) but not post-cured. Other time/temperatureconditions are acceptable providing they produce vulcanizatesthat meet the property requirements.5. Physical Proper
10、ties5.1 The sample shall meet the physical property require-ments 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 D 573 and conform with thefollowing property change requirements to determine dry heatresistance:Hardness Change 610 pointsTensile Str
11、ength Change 40 % maxElongation Change 30 % maxWeight Change +5.0 % max5.3 The material color shall be black.6. Sampling6.1 Sampling and testing shall be as follows:6.1.1 For acceptance tests, sufficient product shall be takenat random from each lot to perform all required tests. Thenumber of sample
12、s tested per lot shall be no less than three.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 one continuous runand presented to th
13、e purchaser at one time.1This specification is under the jurisdiction of ASTM Committee D11 on Rubberand is the direct responsibility of Subcommittee D11.36 on Seals. This specificationwas developed in cooperation with the Fluid Sealing Assocation (SpecificationFSA-DSJ-401-02).Current edition approv
14、ed June 10, 2003. Published June 2003.2Annual Book of ASTM Standards, Vol 09.01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.4 A batch is the quantity of compound run through a millor mixer at one time.6.1.5 The seller shall u
15、se ingredients and manufacturingprocesses on specification test samples that are essentially thesame as those on the approved product.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
16、results are in accordance with this specifi-cation, and preparing the “Batch Test Certification” report. Thebuyer reserves the right to perform confirmatory tests asdeemed necessary to ensure that the product conforms to the“Batch Test Certification” and the full requirements of thisspecification.7.
17、1.1 Acceptance tests shall cover the following physicalproperties:7.1.1.1 Hardness, as received (see Table 1);7.1.1.2 Tensile strength, as received (see Table 1);7.1.1.3 Elongation, as received (see Table 1);7.1.1.4 Specific gravity, as received (see Table 1); and7.1.1.5 Heat aging, as received (see
18、 5.2).7.1.2 Shipments and certification with test values fromacceptance tests in 7.1.1 shall include traceability back topolymers, grade, and lot number.7.2 Periodic TestsTests for the requirements shown inTable 2 are periodic tests and are performed at the purchasersdiscretion unless the purchaser
19、specifies frequency of testing.7.3 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 ingredients or processing or both requiresreapproval or when the buy
20、er 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. Thebuyer reserves the right to obtain additional batch samples andp
21、erform all confirmatory testing he/she deems necessary toensure the product conforms to the full requirements of thisspecification.9. Certification9.1 The seller shall furnish with each shipment a reportshowing the test results on each lot so that conformance toacceptance requirements can be determi
22、ned. 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 ascommercially practical, and free from imperfections detrimen-tal
23、to use as intended.11. Keywords11.1 expansion joints; fluorocarbon terpolymer elastomer;fluoroelastomer; gasketsASTM 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 advis
24、ed 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 revised, either r
25、eapproved 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 attend. If
26、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 States. Individu
27、al 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).TABLE 1 PropertiesProperty Requirement Test MethodsHardness, durometerShore “A” or equivalent80 6 5 D 2240Tensile strength, min 1015 psi (7 Mpa) D 412Elongation, min 275 % D 412Specific gravity 1.87 6 0.03 D 297TABLE 2 Periodic TestsRequirement Test MethodVolume SwellMethanol% max, 4070 6 0.5hat236 3CD 471Volume SwellToluene% max, 3070 6 0.5hat236 3CD 471D6909032
