1、WORLDWIDEENGINEERINGSTANDARDSMaterial Specification GMW14754O-Rings for Quick Connector Fittings for Fuel Systems Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Originating Department: North American Engineering Standards Page 1 of 71 ScopeThis specification covers the materia
2、ls and performance of elastomeric o-rings, used for quick connectorfittings for fuel systems lines. Quick connectors contain two different o-rings, one for reduction of fuelpermeation (Type A, C, E or G) and one for cold resistance properties (generally Type B for liquid fuelapplications, Type D for
3、 fuel vapor applications). If no type designation is given on the blueprint or in the mathdata, the o-rings required to be used must be one of Type A and one of Type B.1.1 Material Description. Materials covered by this specification are divided into seven types:1.1.1 Type A. Fluorosilicone Rubber/F
4、luorocarbon Rubber (FVMQ/FKM) Color Code: brown.1.1.2 Type B. FVMQ Color Code: yellow.1.1.3 Type C. FVMQ/FKM Optional FKM Color Code: black. The material of this o-ring must meet theconductivity requirement of Table 1 (Volume Resistance).1.1.4 Type D. Hydrogenated Nitrile Butadiene Rubber (HNBR) Col
5、or Code: red brown. This type of o-ring isonly to be used for fuel vapor line connections which are outside of the engine compartment.1.1.5 Type E. FKM Color Code: green.1.1.6 Type F. Drawing defined (e.g., using SAE J200 or ASTM D2000 line callout).1.1.7 Type G. FKM, Low Durometer, and Low Tensile
6、Modulus.1.2 Symbols. Not applicable.1.3 Typical Applications. Not applicable.1.4 Remarks. Not applicable.2 ReferencesNote: Only the latest approved standards are applicable unless otherwise specified.2.1 External Standards/Specifications.ASTM D624 ASTM D2240 ISO 48 ISO 23529ASTM D1329 ASTM D3182 ISO
7、 188 SAE AS568-214ASTM D1414 IEC 60093 ISO 815 SAE J200ASTM D2000 ISO 37 ISO 18172.2 GM Standards/Specifications.GMW3059 GMW154232.3 Additional References.x TMC003 Material Safety Data Sheet guidance documents (available at ).x Drawing/Math Data File.3 Requirements3.1 Resources.Copyright General Mot
8、ors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14754 Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Page 2 of 73.1.1 Test Samples (Gen
9、eral). Unless otherwise specified, the shape, size, and number of test pieces shallbe in accordance with the relevant test method. Samples are finished parts or to be taken from finished parts.If not otherwise stated, mechanical properties in delivery state and after heat or fluid immersion are to b
10、etested at +23 C 5 C and with the same test methods. Unless otherwise stated, ambient temperature testconditions shall be held to 23 C 5 C. Unless otherwise stated, all other temperatures except 23 C 5 Cshall be held to 3 C.3.1.2 Conditioning. Conditioning shall be as specified in the relevant test
11、method.3.1.3 Equipment. Conforming to the relevant test methods.3.1.4 Calibration. The test facilities and equipment shall be in good working order and shall have a validcalibration label.3.1.5 Alternatives. Alternative test facilities and equipment may also be used. However, all measuringvariables
12、as specified in this specification shall be determined correctly with respect to its physical definition.3.1.6 Facilities. Conforming to the relevant test methods.3.1.7 Deviations. Deviations from the requirements of this standard shall have been agreed upon. Suchdeviations shall be specified on com
13、ponent drawings, test certificates, reports, etc.3.2 Material and Performance Requirements.3.2.1 Design Validation Testing. Material and performance requirements are summarized in Table 1, andTable 2. All testing of Table 1 and Table 2, must be completed to fulfill the requirements of Design Validat
14、ionTesting. Six (6) samples of material shall be tested to each of the requirements for Design Validation Testingfor Table 1 testing. Sampling requirements for Table 2 testing are defined in 3.3.3.2.2 Production Validation Testing. If not defined otherwise, the testing required for Production Valida
15、tionTesting shall be all of the testing listed in Table 1. Six (6) samples of material shall be tested to each of therequirements for Production Validation Testing.3.2.3 Audit Inspection Testing. If not defined otherwise, the testing required for Audit Inspection Testing shallbe all of the testing l
16、isted in Table 1. Three (3) samples of material shall be tested to each of the requirementsfor Audit Inspection Testing.3.3 Test Samples, Table 2 (Types A, B, E, G). With noted exceptions, all data is generated fromSAE AS568-214 o-rings tested to ASTM D1414 requirements. Test samples from ASTM slabs
17、 must be moldedper ASTM D3182 requirements.3.3.1 Material specification values reported are based on a six (6) sigma limit spread in data from a minimumof five (5) production lots, five (5) samples per lot (for qualification). New materials (not a commercialcompound) will be tentatively approved bas
18、ed on a 1 to 3 pilot lots and one production lot. A material lot is abatch or batches of a compound mixed within a 24 h period, which is tested and approved under the samecode designation. A part lot is a run of parts from the same material lot.3.3.1.1 Materials approved to this specification can on
19、ly be used in the connector designs in which they wereperformance tested. Thus, a connector source cannot use o-ring material tested in and approved for anothersources connector design. Physical property data developed to initially qualify a material need not be repeatedwhen only functional testing
20、is required to approve the material for use in another connector design. Materialsare not approved until all data is received and it passes the functional test requirements per Table 2.Connector sources must report bench test results to materials engineering so the material can be added to theapprov
21、al list. Dependent on the similarity of proposed new materials for approval to other materials alreadyapproved, and dependent on what database of test data is available for the material, the requirements forEngineering Source Approval may be modified by the GM Materials Engineer issuing the approval
22、.3.3.2 Specification ranges involving multiple sources are determined by the lowest and highest three (3) sigmavalue (not necessarily from the same source). Source capability is not measured to the specification range(table), but the specific manufacturers process data. Data and tests for Statistica
23、l Process Control (SPC)purposes must be negotiated between the supplier and the end user.3.3.3 Shelf Life. The materials shall be packed to prevent permanent deformation when shipped or stored. Itmust meet all requirements of this specification after one (1) year of storage at 50 C.3.4 Test Requirem
24、ents. See Table 2.3.4.1 Density. The engineer has the option of requesting the value on the part detail drawing.3.4.2 Sour Gas.Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
25、GM WORLDWIDE ENGINEERING STANDARDS GMW14754 Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Page 3 of 73.4.2.1 For purchase, preparations, and test of sour gas, see GMW15423.3.4.2.2 Measure peroxide number twice each week.3.4.2.3 Change sour gas if peroxide concentration is les
26、s than 432 mg/kg or greater than 594 mg/kg.3.4.2.4 For purchase, preparation, and test of sour gas see, GMW15423.3.4.3 Resistance to 80% Fuel C/20% Methanol. Place the samples in freshly made blend solution each weekto maintain a proper alcohol concentration. Water-cooled condensers should be used f
27、or better blend ratiomaintenance.3.4.4 Complete performance specification testing of the materials and design comprising the assembly intowhich the quick connector has been incorporated is required for o-ring approval to this specification.Table 1: Material and Performance Properties, Types A throug
28、h GProperty Test Method Unit ValueHardnessType A and E ISO 48 Method M (measured on cross section) IRHD 70 + 5 - 10Type B ISO 48 Method M (measured on cross section) IRHD 65 + 10 - 5Type C ISO 48 Method M (measured on cross section) IRHD 75 10Type D ISO 48 Method M (measured on cross section) IRHD 7
29、0 5Type F, G As specified on drawing/math data file Shore A As specified ondrawingElongation at BreakType A and E ISO 37, on complete o-ring500 50 mm/minute% 115 minimumType B ISO 37, on complete o-ring500 50 mm/minute% 140 minimumType C ISO 37, on complete o-ring500 50 mm/minute% 80 minimumType D I
30、SO 37, on complete o-ring500 50 mm/minute% 200 minimumType F, G As specified on drawing/math data file % As specified ondrawingAge Resistance (Heat Aging)Type A, B, C, E ISO 188 Method B, 168 h -2 h at+150 C 3 CChange in HardnessIRHD + 12 maximumType D ISO 188 Method B, 168 h -2 h at+125 C 3 CChange
31、 in HardnessIRHD + 10 maximumType F, G As specified on drawing/math data file As specified ondrawingCopyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING ST
32、ANDARDS GMW14754 Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Page 4 of 7Property Test Method Unit ValueFuel ResistanceType A, C ISO 1817, Liquid 2, 48 h -2 h at +23 C 5 Cwhole o-ringChange of volume (15 minutes after removal)% + 30 maximumType B ISO 1817, Liquid 2, 48 h -2
33、h at +23 C 5 Cwhole o-ringChange of volume (15 minutes after removal)% + 35 maximumType D ISO 1817, Liquid 2, 48 h -2 h at +23 C 5 Cwhole o-ringChange of volume (15 minutes after removal)% + 50 maximumType E ISO 1817, Liquid 2, 48 h -2 h at +23 C 5 Cwhole o-ringChange of volume (15 minutes after rem
34、oval)% + 20 maximumType A, B, C, D, E bending test after subsequent storage in air for48 h -2 h at +23 C 5 Cuntil opposite points meet No cracksType F, G As specified on drawing/math data file % As specified ondrawingCompression SetType A, E ISO 815, on complete o-ring+125 C 3 C, 24 h -2 h, 25% comp
35、ressed % 30maximumType B, C ISO 815, on complete o-ring+125 C 3 C, 24 -2 h, 25% compressed % 25 maximumType D ISO 815, on complete o-ring+100 C 3 C, 24 h -2 h, 25% compressed % 30 maximumType F, G As specified on drawing/math data file % As specified ondrawingCold ResistanceType A, C, E ISO 23529, -
36、20 C 3 C; 5 h -0.2 hBending test until opposite parts meet No cracksType B, D ISO 23529, -40 C 3 C; 5 h -0.2 hBending test until opposite parts meet No cracksType F, G As specified on drawing/math data file As specified ondrawingVolume ResistanceType C IEC 60093, Test voltage 500 V : 107 maximumType
37、 F, G As specified on drawing/math data file As specified ondrawingCopyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14754 Copyright 2012 G
38、eneral Motors Company All Rights ReservedOctober 2012 Page 5 of 7Table 2: Material and Performance Properties, Grades A, B, E, GTest Property Test Method Unit Type A Type B Type E Type GDurometer ASTM D2240 ShoreA75 10 75 10 75 5 65 550% Tensile Modulus ASTM D1414 MPa 2.8minimum1.0minimum2.0minimum1
39、.0minimumElongation ASTM D1414 % 115minimum140minimum175minimum200minimumTension Set ASTM D1414 % 6 maximum 6 maximum 6 maximum 6 maximumTear Strength ASTM D624Die C,unnickedkN/m 11 minimum 11 minimum 14 minimum 14 minimumHeat ResistanceChange in 50% ModulusChange in ElongationASTM D1414,70 h at225
40、C % 0 to +35-30 to 0 0 to +30-45 to 0 -20 to +20-20 to +20 -20 to +20-20 to +20Compression Set ASTM D1414,22 h at100 C% 30maximum15maximum25maximum25maximumLow TemperatureRetraction TR10ASTM D1329 qC -20maximum-55maximum-5maximum-5maximumDensity ASTM D1414 g/cm 0.02 0.02 0.02 0.02Resistance to Sour
41、GasChange in TensileChange in ElongationChange in Tear StrengthChange in VolumeASTMD 1414,168 h at60 C %-45 to 0-25 to 0-50 to 00 to +20-42 to 0-30 to +13- 50 to 00 to +30-60 to 0-30 to +30- 50 to 00 to +35-60 to 0-30 to +30- 50 to 00 to +35Resistance to 80% FuelC/20% MeOHChange in TensileChange in
42、ElongationChange in Tear StrengthChange in VolumeASTM D1414,70 h at 23 C%-70 to 0-50 to 0-70 to 00 to +40-60 to 0-33 to +20-50 to 00 to +35-30 to 0-10 to +10-35 to 0-10 to +10-30 to 0-10 to +10-35 to 0-10 to +10Long Term Resistance to80% Fuel C/20% MeOH(Fuel needs to bechanged once per week)Change i
43、n TensileChange in ElongationChange in Tear StrengthChange in VolumeASTM D1414,1008 h at49 C%-75 to 0-65 to +25-75 to 00 to +40-65 to 0-50 to 0-60 to 00 to +35-55 to 0-20 to 0-50 to 00 to +25-55 to 0-20 to 0-50 to 00 to +25Copyright General Motors Company Provided by IHS under license with General M
44、otors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14754 Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Page 6 of 74 Manufacturing ProcessNot Applicable5 Rules and Regulations5.1 Legal Regulatio
45、ns. All materials must satisfy applicable laws, rules, regulations and recommendationsvalid in the country of usage.5.2 Language. In the event of conflict between the English and domestic language, the English language shalltake precedence.5.3 Inspection and Rejection. Samples of components or mater
46、ials released to a GM material specificationshall be tested for conformity with the requirements of this material specification and approved by theresponsible Engineering department prior to commencement of delivery of bulk supplies.A new approval must be received for any changes, e.g., properties,
47、manufacturing process, location ofmanufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial releasemust be completed.It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and toinclude documentation of a
48、ll modifications of materials and/or processes and to apply for a new release.If not otherwise agreed, all release tests shall be repeated and documented by the supplier prior tocommencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreedto between the
49、responsible Engineering department and the supplier.5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when achange in chemical composition of an existing product has occurred, a complete copy of the Material SafetyData Sheet/Safety Data Sheet must be submitted in com
