1、Designation: D7999 15Standard Classification forRubber Products in Natural Gas Pipeline Applications1This standard is issued under the fixed designation D7999; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi
2、on. 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 classification system covers the properties of vul-canized rubber materials (natural rubber, reclaimed rubber,synthetic robb
3、ers, alone or in combination) that are intendedfor use in rubber products found in natural gas pipelineapplications (for example, elastomeric couplings, o-rings, quadseals, and diaphragms).1.2 This classification system is based on the premise thatthe material properties of all rubber products can b
4、e arrangedinto characteristic material designations. These designationsare determined by types and classes as described in Classifi-cation System D2000. For gas industry pipeline applications,materials can be further described using additional require-ments herein in conjunction with Classification
5、System D2000.It must be noted that there are other types of elastomerscovered in Classification System D2000 that are not covered bythis standard.1.3 In all cases where the provisions of this classificationsystem would conflict with those of the detailed specificationsfor a particular product, the l
6、atter shall take precedence.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its 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
7、prior to use.2. Referenced Documents2.1 ASTM Standards:2D297 Test Methods for Rubber ProductsChemical Analy-sisD471 Test Method for Rubber PropertyEffect of LiquidsD573 Test Method for RubberDeterioration in an AirOvenD1418 Practice for Rubber and Rubber LaticesNomenclatureD1566 Terminology Relating
8、 to RubberD2000 Classification System for Rubber Products in Auto-motive ApplicationsD6370 Test Method for RubberCompositional Analysisby Thermogravimetry (TGA)D8015 Test Method for Dimensional Changes of Elastomerand Rubber Materials Due to Exposure to Gaseous Hy-drocarbon Environments3. Terminolog
9、y3.1 DefinitionsFor definitions of technical terms pertain-ing to rubber used in this specification, see TerminologyD1566.3.2 DefinitionsThe nomenclature and abbreviations usedfor natural and synthetic rubbers are in accordance withPractice D1418.4. Purpose4.1 The purpose of this classification syst
10、em is to provideguidance to the engineer in the selection of practical, commer-cially available rubber materials, and further to provide amethod for specifying these materials by the use of a simple“line call-out” designation.4.2 This classification system was developed to permit theaddition of desc
11、riptive values for future rubber materialswithout complete reorganization of classification system and tofacilitate the incorporation of future new test methods to keeppace with changing industry requirements.5. Classification5.1 Rubber materials shall be specified using the conventionset forth in C
12、lassification System D2000 with additional rubberproperties represented by supplemental suffix designations ZGnas described in Table 1.6. Basic Requirements6.1 The basic requirements for the properties specified inthis standard are based on values obtained from standardlaboratory test specimens prep
13、ared and tested in accordancewith the applicable ASTM test methods. Test results fromspecimens prepared from finished products may not duplicatevalues obtained from standard test specimens.1This classification is under the jurisdiction of ASTM Committee D11 onRubber and is the direct responsibility
14、of Subcommittee D11.30 on Classification ofRubber Compounds.Current edition approved June 1, 2015. Published January 2016. DOI: 10.1520/D7999-15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards
15、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 States17. Suffix Requirements7.1 Suffix requirements shall be specified only as needed todefine qualities nec
16、essary to meet service requirements. Suffixletters and suffix numbers describing the suffix requirementsmay be used singly or in combination but not all suffx valuesavailable for a given material need be specified.7.2 The supplemental suffix requirements for the ZGndes-ignations are shown in Table 2
17、.8. Line Call-Outs8.1 A line call-out is the specification and shall followSection 9 of Classification System D2000. Following is anexample of line call out using the supplemental suffix require-ments of Table 2.Classification System D2000 M2BC 507 A14 EO34 ZG1ZG2ZG3ASTM D2000 = Standards Organizati
18、on and Document NumberBasic Requirements:M = Requirements are in SI Units.2 = Applicable Suffix Grade.B = Material Type based on Temperature Resistance.C = Material Class based on IRM 903 Oil Volume Swell.5=x10isTypeAHardness (that is, 5 indicates requirement is 50).07 = Tensile Strength (“M” in lin
19、e call out indicates units are in MPa).Suffix Requirements:A14 = A Heat Resistance; 1 Test Method D573, 70 h; 4 100CEO34 = EO Fluid Resistance in Oils and Lubricants; 3 TestMethod D471,IRM 903 Oil, 70 h; 4 100C; ZG1 = Gaseous Effect, Test MethodD8015;ZG2= Solvent Extractable Content; ZG3= Carbon Bla
20、ck Content9. Test Methods9.1 The applicable test methods are listed in Table 5 ofClassification System D2000 and Table 2.10. Sampling and Inspection10.1 A lot, unless otherwise specified, shall consist of allproducts of the same material submitted for inspection at thesame time.10.2 When proof of co
21、nformance with a specification basedon this classification system is required, the supplier shall,upon request of the purchaser at the time of ordering, furnish asufficient number of samples to permit the performance of therequired tests. Test specimens shall be prepared as prescribedin 6.1. The sam
22、ples shall be warranted to have equivalent cureand to be from the same run or batch of compound used in thelot.11. Keywords11.1 elastomer; gas industry applications; pipeline; rubberASTM International takes no position respecting the validity of any patent rights asserted in connection with any item
23、 mentionedin this standard. 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 commi
24、ttee and must be reviewed 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 me
25、eting of theresponsible 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,
26、 PO Box C700, West Conshohocken, 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)
27、. 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:/ 1 Meaning of Suffix LettersSuffix Letter Test RequiredA Heat ResistanceB Compression SetC Ozone or Weather ResistanceD Compression-
28、Deflection ResistanceEA A Fluid Resistance (Aqueous)EF F Fluid Resistance (Fuels)EO O Fluid Resistance (Oils and Lubricants)F Low-Temperature ResistanceG Tear ResistanceH Flex ResistanceJ Abrasion ResistanceK AdhesionM Flammability ResistanceN Impact ResistanceP Staining ResistanceR ResilienceZG1Gas
29、eous EffectsZG2Solvent Extractable ContentsZG3Filler and Carbon Black ContentTABLE 2 Supplemental Suffix Requirements Classification ofElastomeric MaterialsSuffix RequirementsAllGradesType/ClassAA, BF, BG BKZG1Gaseous Effects, Test MethodD8015 Dimensional change,max%4%ZG2Solvent Extractable Content TestMethods D297 Section 26, 30 minexposure, max%10%ZG3Carbon Black Content, Test MethodD6370,%4050%D7999 152
