1、BS F 156:2006Properties of fluid resistant ethylenepropylene rubber sheet, mouldings and extrusions SpecificationICS 49.025.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDIncorporatingCorrigendum No. 1Publishing and copyright informationThe BSI copyright noti
2、ce displayed in this document indicates when the document was last issued. BSI 2008ISBN 978 0 580 61305 0The following BSI references relate to the work on this standard:Committee reference ACE/65Draft for comment 05/30130028 DCPublication historyFirst published October 2006Amendments issued since p
3、ublicationAmd. no. Date CommentsCorrigendum No. 1 31 January 2008 Revision of values given in Table 3, final rowBS F 156:2006 BSI 2008 iBS F 156:2006ContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 24 Material 25 Properties 36 Test sheet manufacture 67 Test methods 68 Qual
4、ity of material 89 Marking, labelling and packaging 8AnnexesAnnex A (normative) Manufacture of test sheet 9Bibliography 10List of tablesTable 1 Tests as moulded material 4Table 2 Modulus rigidity test at low temperature 4Table 3 Tests after exposure to heat ageing 5Table 4 Tests after immersion in f
5、luid Tri-n-butyl phosphate 5Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 10, an inside back cover and a back cover.BS F 156:2006ii BSI 2008ForewordPublishing informationThis British Standard was published by BSI and came into effect on 31 O
6、ctober 2006. It was prepared by ACE/65/-/25, Rubbers, elastomers and sealants, under the authority of Technical Committee ACE/65, Inspection and testing requirements for non-metallic materials. A list of organizations represented on this committee can be obtained on request to its secretary.The star
7、t and finish of text introduced or altered by Corrigendum No. 1 is indicated in the text by tags ab.Information about this documentThis document supersedes DTD 5597A, which was declared obsolescent by the Ministry of Defence from 1 April 1999.Hazard warningsWARNING. This British Standard calls for t
8、he use of substances and/or procedures that can be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage.Use of this documentIt has been assumed in the prepara
9、tion of this British Standard that the execution of its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been produced.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expres
10、sed in sentences in which the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element.Contractual and legal considerationsThis publication does not purport to include all the necessa
11、ry provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. BSI 2008 1BS F 156:20061 ScopeThis British Standard specifies requirements for fluid resistant ethylenepropylene rubber material with excel
12、lent ozone resistance properties intended for the production of items such as sheet, mouldings and certain extrusions, for use in sealing operations where low compression set is of prime importance while in contact with phosphate ester hydraulic fluids over a temperature range of p60 C to 100 C, or
13、with silicone hydraulic fluids over a temperature range of p60 C to 130 C1).For applications in contact with air, the material may be suitable for use over a temperature range of p60 C to 120 C.NOTE 1 Material in contact with phosphate ester hydraulic fluids may be exposed to temperatures up to 130
14、C for intermittent periods, and material in contact with silicone hydraulic fluids exposed to temperatures up to 160 C for intermittent periods.NOTE 2 Materials and products manufactured from this material are unsuitable for use in contact with fuels, mineral oil based and di-ester oils and silicate
15、 fluids or greases derived from them.NOTE 3 Further information on the suitability of fluid resistant ethylenepropylene rubber for design applications can be found in SBAC Technical Specification No. 97 1.NOTE 4 Marking BS F 156:2006 on or in relation to a product represents a manufacturers declarat
16、ion of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants responsibility. Such a declaration is not to be confused with third party certification of conformity.2 Normative referencesT
17、he following referenced documents are indispensable for the application of this document. For dated references, only the reference cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS 903-A1 (ISO 2781), Physical testing of rubber
18、Part A1: Determination of densityBS 903-A6 (ISO 815), Physical testing of rubber Part A6: Method for determination of compression set at ambient, elevated or low temperaturesBS 903-A13 (ISO 1432), Physical testing of rubber Part A13: Method for determination of stiffness at low temperature (Gehman t
19、ests)BS ISO 6505, Rubber, vulcanized or thermoplastic Determination of tendency to adhere to and corrode metals1)Ethylenepropylene rubber products, when properly stored at room temperature and in the absence of hostile environments, deteriorate very slowly and, for most practical purposes, the stora
20、ge life may be considered indefinite. However, the rate of deterioration increases markedly with increase in temperature and the service life of the rubber therefore depends upon the operational temperature. Conversely, the maximum temperature at which the rubber may be used depends on the useful li
21、fe required.BS F 156:20062 BSI 2008BS 903-A26 (ISO 48), Physical testing of rubber Part A26: Method for determination of hardness (hardness between 10 IRHD and 100 IRHD)BS 3734-1 (ISO 3302-1), Rubber Tolerances for products Part 1: Dimensional tolerancesBS EN 3207, Rubber compounds Technical specifi
22、cationBS F 68, Controlled storage of vulcanized rubbers for use in aerospace applicationsBS F 69, Packaging and identification of vulcanized rubber itemsBS ISO 37, Physical testing of rubber Part A2: Method for determination of tensile stress Strain propertiesBS ISO 188 (BS 903-A19), Rubber, vulcani
23、zed or thermoplastic Accelerated ageing and heat resistance testsBS ISO 1817, Rubber, vulcanized Determination of the effect of liquids3 Terms and definitionsFor the purposes of this British Standard, the following terms and definitions apply.3.1 polymermaterial formed by joining together many (poly
24、) individual units (mer) of one or more monomers3.2 vulcanizationthermosetting reaction involving the use of heat and pressure, resulting in greatly increased strength and elasticity of rubber-like materials4Material4.1 Material compositionMaterial shall consist of an ethylenepropylene copolymer or
25、ethylenepropylenediene terpolymer homogeneous mix of recognized rubber quality products suitably compounded and cured to meet the requirements of this specification. No factice, reclaimed or ground vulcanized waste shall be used in the mix.4.2 Manufacturing controlEthylenepropylene rubber material a
26、nd products manufactured from this material shall be formulated and manufactured to issue controlled documentation, which shall form part of the contract between purchaser and manufacturer.Changes to the formulation or manufacturing process shall not be made without due consideration being given tha
27、t the modified material/product meets all the requirements of the standard. BSI 2008 3BS F 156:20064.3 Classification and gradesMaterial shall be supplied in five nominal hardness grades: Grade 50; Grade 60; Grade 70; Grade 80; Grade 90.Material or products manufactured to a nominal hardness grades
28、other than those specified shall, with the exception of hardness, meet all the requirements of this specification specified for the grade embracing the nominal hardness value. Tolerances, if required tighter than those specified within this specification, shall not be tighter than 3.NOTE For example
29、, where a hardness of 65 is specified, the requirements of Grade 60 shall apply as the value of 65 lies within the 56 to 65 hardness range of Grade 60.5PropertiesMaterial manufactured in accordance with Annex A shall meet the requirements specified within Tables 1, 2, 3 and 4.The first production ba
30、tch and every subsequent 10th batch of material shall be fully tested in accordance with: material standard line numbers 1, 3, 5, 7 and 15 of Table 1;Table 2;Table 3;Table 4.All other batches of material shall be tested in accordance with: material standard line numbers 1, 3 and 15 of Table 1; mater
31、ial standard line numbers 3 and 7 of Table 4.BS F 156:20064 BSI 2008Table 1 Tests as moulded materialBS EN 3207 material standard line numberTest Test requirementGrade 50 Grade 60 Grade 70 Grade 80 Grade 901Hardnes, IRHD50+5p460+5p470+5p480+5p490+3p423Density, Mg/m3Within 0.02 of requirement within
32、controlling documentation45 Tensile strength, MPa (min.)10.0 10.5 11.0 11.5 11.567 Elongation at break, % (min.)400 300 250 170 13089101112131415 Compression set, % (max.)25 20 20 20 2016171819 Corrosion and adhesion on metals in a dry atmosphereNo adhesion to the metal surfaces nor corrosion or pit
33、ting of the metals. Discoloration of the metal surfaces will not be considered objectionable.Table 2 Modulus rigidity test at low temperatureBS EN 3207 material standard line numberTest Test requirementGrade 50 Grade 60 Grade 70 Grade 80 Grade 90Temperature at which rigidity modulus does not exceed
34、70 MPa, Cp45 p45 p45 p40 p40 BSI 2008 5BS F 156:2006Table 3 Tests after exposure to heat ageingBS EN 3207 material standard line numberTest Test requirementGrade 50 Grade 60 Grade 70 Grade 80 Grade 9012 Tests on standard test pieces unless otherwise specified after accelerated temperature ageing acc
35、ording to BS ISO 1883 Permissible variation of the properties compared to the initial value45 Change in tensile strength, % of original value (max.)p20 p20 p15 p15 p156 Change in elongation at break, % of original value (max.)p20 p20 p20 p20 p207 Change in hardness, IRHD +150+150a+100+100+100bTable
36、4 Tests after immersion in fluid Tri-n-butyl phosphateBS EN 3207 Material standard line numberTest Test requirementGrade 50 Grade 60 Grade 70 Grade 80 Grade 9012 Tests on standard test pieces unless otherwise specified after immersion in fluids according to BS ISO 18173 Permissible variation of the
37、properties compared to the initial valueChange in volume, % (max.)+20 +20 +20 +20 +2045 Change in tensile strength, % of original value (max.)p20 p20 p20 p20 p206 Change in elongation at break, % of original value (max.)p25 p25 p25 p25 p257 Change in hardness, IRHD (max.) p20 p20 p20 p20 p20BS F 156
38、:20066 BSI 20086 Test sheet manufactureManufacture sufficient test sheets and/or cylindrical buttons in accordance with Annex A for the determinations of properties required in Clause 8.7 Test methods7.1 Accelerated heat ageing Test specimens, when required, shall be subjected to accelerated tempera
39、ture ageing in accordance with BS ISO 188 for (168 2) h at (125 2) C.7.2 Fluid immersionTest specimens, when required, shall be subjected to immersion in tri-n-butyl phosphate test fluid of density 0.975 to 0.976 Mg/m3, refractive index 1.424 to 1.425, and acidity 0.15% max measured as H3PO4in accor
40、dance with BS ISO 1817 for 480p2h at (100 2)C.7.3 Determination of hardness7.3.1 As manufactured materialDetermination of hardness shall be conducted in accordance with BS 903-A26, Method N on a specimen extracted from the thicker portion of the test sheet and superimposed upon the thinner section o
41、f the same sheet during test. 7.3.2 Before and after heat ageingDetermination of the effects of heat ageing on the hardness of the material shall be conducted in accordance with BS 903-A26, Method N by testing two plies of the thinner section of the test sheet superimposed upon each other. Tests sha
42、ll be carried out prior to and after accelerated heat ageing.7.3.3 After immersion in fluidsDetermination of the effects of immersion in fluids on the hardness of the material shall be conducted in accordance with BS 903-A26, Method N by testing two plies of the thinner section of the test sheet sup
43、erimposed upon each other during test. The tests shall be conducted prior to and after immersion.7.4 Determination of densityDetermination of the density of the material shall be conducted in accordance with BS 903-A1, Method A. BSI 2008 7BS F 156:20067.5 Determination of tensile strength and elonga
44、tion at break7.5.1 As manufactured materialDetermination of the tensile strength and elongation at break shall be conducted in accordance with BS ISO 37 using Type 2 dumb-bell specimens extracted from the thinner section of the test sheet.7.5.2 Before and after heat ageingDetermination of the effect
45、s of heat aging on the tensile strength and elongation at break of the material shall be conducted in accordance with BS ISO 37 using Type 2 dumb-bell specimens extracted from the thinner section of the test sheet. Tests shall be carried out prior to and after accelerated heat ageing.7.5.3 After imm
46、ersion in fluidsDetermination of the effects of immersion in fluids on the tensile strength and elongation at break of the material shall be conducted in accordance with BS ISO 37 using Type 2 dumb-bell specimens extracted from the thinner section of the test sheet. Tests shall be carried out prior
47、to and after accelerated heat ageing.7.6 Determination of compression setDetermination of compression set shall be conducted in accordance with BS 903-A6 using Type B specimens extracted from the thicker section of the test sheet or on moulded cylindrical buttons. The specimens after compression sha
48、ll be subjected to (100 1) C for 240p2h.7.7 Determination of resistance to low temperatureDetermination of the temperature of modulus rigidity of the material shall be conducted in accordance with BS 903-A13 on specimens extracted from the thinner section of the test sheet.7.8 Determination of volum
49、e changeDetermination of the effect of volume change of the material after immersion in fluids shall be conducted in accordance with BS ISO 1817.7.9 Determination of freedom from corrosion or adhesion to metalsDetermination of freedom from corrosion or adhesion to metals shall be conducted in accordance with BS ISO 6505. The specimens shall be subjected to a test temperature of (125 1) C for (168 2) h using aluminium and mild steel standard test met
