1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16709 Fuel Hose - Small Diameter Copyright 2011 General Motors Company All Rights Reserved October 2011 Originating Department: North American Engineering Standards Page 1 of 13 1 Introduction Note: Nothing in this standard supercedes applic
2、able laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Scope. This standard covers the material requirements of fuel hoses for use with gasoline or diesel fuel in automotive fuel systems. All hoses shall be
3、 considered conductive, and must meet the conductivity requirements of this specification, unless otherwise noted on the part drawing. The material content of the hose and stiffness of the hose are defined by the Construction and Temperature class designations for the hose. Hoses are defined by the
4、Construction and temperature capability. Hoses are either suitable for applications subjected to maximum continuous operation temperatures of +90 C with intermittent operation at temperatures up to +110 C maximum, to maximum continuous operation temperatures of +125 C with intermittent operation at
5、temperatures up to +150 C maximum, or for applications subjected to maximum continuous operation temperatures of +150 C with intermittent operation at temperatures up to +175 C, dependent on the “Temperature Rating” of the hose. The designation for the fuel hose is defined as GMW16709 Type YZ, where
6、 Y defines the temperature capability of the hose, and Z defines the “Construction” of the hose per 3.8.1 through 3.8.3 and Table 1. 1.2 Mission/Theme. Not applicable. 1.3 Classification. Not applicable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified.
7、 2.1 External Standards/Specifications. ASTM D380 ISO 37 ASTM D412 ISO 48 ASTM D413 ISO 188 ASTM D471 ISO 1431-1 IEC 60093 ISO 1817 ISO 34-1 ISO 23529 ISO 36 2.2 GM Standards/Specifications. GMW3059 GMW14681 GMW14291 GMW14914 GMW14292 GMW15423 GMW14680 2.3 Additional References. Component Technical
8、Specifications (CTS) General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents Subsystem Technical Specifications (SSTS) 3 Test Preparation and Evaluation 3.1 Resources. 3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a v
9、alid calibration label. 3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variables as specified in this standard shall be determined correctly with respect to their physical definition. 3.1.3 Facilities. Facilities shall conform to the relevant t
10、est procedures. 3.1.4 Equipment. Equipment shall conform to the relevant test procedures. 3.1.5 Test Vehicle/Test Piece. Not applicable. 3.1.6 Test Time. Shall conform to the relevant test procedures. 3.1.7 Test Required Information. Conforming to the relevant test procedures. 3.1.8 Personnel/Skills
11、. Not applicable. 3.2 Preparation. Not applicable. 3.3 Conditions. 3.3.1 Environmental Conditions. The minimum time between vulcanization and testing of elastomers shall be 72 h. The test pieces shall be maintained at a temperature of 23 C 5 C for at Provided by IHSNot for ResaleNo reproduction or n
12、etworking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16709 Copyright 2011 General Motors Company All Rights Reserved October 2011 Page 2 of 13 least 8 h prior to test and shall be free from strain during this period. 3.3.2 Test Conditions. Deviations from the requir
13、ements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. Ambient temperature test conditions shall be held to 23 C 5 C. All other temperatures shall be held to a 3 C and all pressures to -0/+690 kPa unless other
14、wise noted. 3.4 Instructions. Not applicable. 3.5 Data. Not applicable. 3.6 Safety. This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standa
15、rd to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 3.7 Documentation. Samples of components or material released to this standard shall be tested for conformity with the requirements of this standard and approved by the res
16、ponsible GM department prior to the start of delivery of production level components or materials. Any change to the component or material, e.g., design, function, properties, manufacturing process and/or location of manufacture requires a new release of the product. It is the sole responsibility of
17、 the supplier to provide the customer, unsolicited, with documentation of any change or modification to the product/process, and to apply for a new release. If not otherwise agreed to, the entire verification test shall be repeated and documented by the supplier prior to start of delivery of the mod
18、ified or changed product. In some cases, a shorter test can be agreed to between the responsible GM department and the supplier. 3.7.1 Test Results. With reference to this standard, the test results shall be presented in a test report. 3.8 Material Description. Materials covered by this standard are
19、 divided into several sets of constructions and temperature rating categories. The hose is defined as “GMW16709 Type YZ”, where “Y” refers to the temperature rating of the hose, and “Z” refers to the construction of the hose. 3.8.1 Hose Construction. 3.8.1.1 Construction: The “Construction” of the h
20、ose defines the material content and construction of the hose. The following materials are used in the various constructions: Tetrafluoroethylene hexafluoropropylene (THV) Chlorinated Polyethylene Elastomer (CM) Epichlorohydrin/ethylene oxide copolymer (ECO) Fluoroelastomer (FKM) Fluorocarbon Thermo
21、plastic Vulcanizate (FTPV) Ethylene Acrylate Elastomer (AEM) Polyacrylate Rubber (ACM) Ethylene Vinyl Acetate copolymer (EVM) All hoses must have a reinforcement made of aramid fibers. Reinforcement to the tube of the hose may be applied by braiding, knitting, or circular weaving. The reinforcement
22、is placed between the laminated tube and the cover of the hose. 3.8.1.2 The thickness of the barrier layer shall be sufficient to fulfill gasoline permeation requirements and to ensure resistance to gasoline and biodiesel fuels. Based on the various constructions of hose used for this application th
23、e possible combinations are shown in Table 1. 3.8.2 Fuel Compatibility. Hoses are suitable for gasoline and diesel/biodiesel applications unless otherwise determined in Table 1. 3.8.3 Temperature Rating. The hose is placed into one of three classes defining the hose heat exposure limits. Those hoses
24、 that are approved for Temperature Limit B and C are automatically also approved for lower Temperature Limits. 3.8.3.1 Temperature Limit A. This hose has a continuous operation temperature limit of 90 C and an excursion temperature limit of +110 C. 3.8.3.2 Temperature Limit B. This hose has a contin
25、uous operation temperature limit of +125 C and an excursion temperature limit of +150 C. 3.8.3.3 Temperature Limit C. This hose has a continuous operation temperature limit of +150 C and an excursion temperature limit of +175 C. 3.8.4 Dimensions and Tolerances. Hoses designed to this specification s
26、hall conform to the requirements of Table 2; unless other otherwise specified on the drawing. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16709 Copyright 2011 General Motors Company All Rights Reserved Octobe
27、r 2011 Page 3 of 13 Table 1: Construction, Temperature Limit and Coding Lining Intermediate Layer Cover Usage Note 1 Coding Temperature Limit A 90 C/110 C THV ECO Reinforcement ECO G, D A1 Temperature Limit B 125 C/150 C FKM ECO Reinforcement ECO G, D B1 FKM ECO ACM G, D B2 FKM ECO CM G, D B3 FKM -
28、ECO G, D B4 FKM CM CM D B5 FTPV ECO ECO G, D B6 FTPV ECO AEM G, D B7 FTPV ECO ACM G, D B8 Temperature Limit C 150 C/175 C FKM ECO Reinforcement AEM G, D C1 FKM ECO ACM G, D C2 FKM - AEM G, D C3 FKM AEM AEM D C4 FKM AEM EVM D C5 Note 1: G = Gasoline Application, D = Diesel Application Table 2: Dimens
29、ions and Tolerances mm = millimeter in = inch min = minimum max = maximum Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16709 Copyright 2011 General Motors Company All Rights Reserved October 2011 Page 4 of 13
30、3.8.5 Coupling Construction. If the fuel hose is to be crimped or clamped into an assembly, the design and test requirements shall meet specification GMW16709, “Fuel Hose - Small Diameter”. 3.9 Basic Test Requirements. 3.9.1 Required Tests. Fuel hose shall be tested to the requirements as specified
31、in Table 3. Table 3: Test Table Test Number of Samples DV Note 1 PV Note 2 Material Properties to Tables 4, 5 6 Note 1: DV Hose Design Validation. Note 2: PV Hose Process Validation. 3.9.2 Engineering Approval Factors. Engineering source approvals generated through testing to prove compliance to thi
32、s specification are specific for combinations of the following factors. 3.9.2.1 Type. Refer to Table 1. 3.9.2.2 Size of hose. 3.9.2.3 Hose material and construction. 3.9.2.4 Supplier specifications and manufacturing procedures, supplier (both hose and assembly) manufacturing sites. 3.9.5 Design Leve
33、l Requirements. All hoses manufactured for testing to this specification for engineering source approval purposes shall be completely representative of production level materials, components, processes and tooling. Any deviation from these requirements must be discussed with the GM Materials Enginee
34、r generating the approval to the specification prior to the initiation of the test program. 3.10 Deviations from Test Procedure. Elastomer material properties must be measured on samples taken from hose unless appropriate samples cannot be taken from the hose. Samples prepared from slab stock must b
35、e documented as such and the cure state of the slab stock must be shown to be equivalent to the cure state of the hose elastomer. Other deviations from the requirements of the test procedures shall have been agreed upon by the GM Materials Engineer generating the engineering source approval. Such re
36、quirements shall be specified on component drawings, test certificates, reports, etc. 3.11 Material and Performance Requirements. These requirements for testing are specific to this specification for the purpose of hose suppliers to become qualified to supply hose assemblies to GM, and to stay quali
37、fied. Sample sizes and preparation are described in Table 3 for Design Validation Testing, Process Validation and Audit/Inspection Testing. 3.11.1 Hose Design Validation Testing. Material properties (material/compound approval) are summarized in Table 4, performance requirements (construction approv
38、al) in Table 5. For full approval of a hose, compliance to the requirements of Tables 4 and 5 is needed. 3.11.2 Hose Process Validation Testing. If not defined otherwise, the following testing should be done for production validation testing. Material Properties (For hose manufacturing site producti
39、on validation testing.) All tests per Table 4 except Ozone Resistance, Deposits, and all Fuel Resistance tests. Hose Performance Tests (For hose manufacturing site production validation testing.) All tests per Table 5 except all Fuel Exposure and Fuel Recirculation tests, Dry Heat Resistance. 3.11.3
40、 Audit/Inspection Testing (Hose Process Validation Audit Testing). If not defined otherwise, the following testing should be done for production audit testing. Material Properties. Tests per Table 4: Elongation at Break, Tensile Strength for all layers, short term aging for cover and adhesion for co
41、nstruction. Hose Performance Tests. Tests per Table 5: Burst, Fuel Permeability, Push-on/Pull-off. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16709 Copyright 2011 General Motors Company All Rights Reserved O
42、ctober 2011 Page 5 of 13 4 Requirements and Procedure Table 4: Material Properties Requirements for the Tube Properties for the Inner FKM Liner Note 1 Property Test Procedure Unit Value Hardness Construction B and C ISO 48, Method M IRHD 70 to 80 Elongation at Break Construction B and C ASTM D412 or
43、 ISO 37, Type 4 dumbell, 200 mm 20 mm/minute % 200 minimum Tensile Strength Construction B and C ASTM D412 or ISO 37, Type 4 dumbell, 200 mm 20 mm/minute MPa 8 minimum Fuel Resistance Biodiesel Compatible Note 2 Construction B and C Diesel Application ISO 1817, Diesel fuel to GMW14914, GMNA +125 C 3
44、 C, 168 2 h Change in Hardness Elongation at break Tensile strength Change in Mass IRHD % MPa % 0 to -10 200 minimum 8 minimum 0 to +5 maximum Construction B and C Diesel Application ISO 1817, Diesel fuel to GMW14914, GMNA +125 C 3 C, 1008 2 h Change in Hardness Elongation at break Tensile strength
45、Change in Mass IRHD % MPa % 0 to -15 150 minimum 6 minimum 0 to +10 maximum Fuel Resistance Gasoline Compatibility Note 2 Construction B and C Gasoline Application Gasoline test fuel per GMW14914, GME, 168 2 h, at 23 C 5 C All tests performed 1 minute after removal from test liquid Change in Hardnes
46、s Elongation at break Tensile strength Change in Mass IRHD % MPa % 0 to -20 150 minimum 5 minimum 0 to +20 Construction B and C Gasoline Application Gasoline test fuel per GMW14914, GME, 1008 2 h, at 60 C 3 C All tests performed 1 minute after removal from test liquid Change in Hardness Elongation a
47、t break Tensile strength Change in Mass % % Shore A % Determine at time of test 150 minimum 5 minimum Determine at time of test Deposits Construction B and C Gasoline Application GMW14292 No Deposits Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM
48、 WORLDWIDE ENGINEERING STANDARDS GMW16709 Copyright 2011 General Motors Company All Rights Reserved October 2011 Page 6 of 13 Properties for the Inner THV Liner Note 3 Property Test Procedure Unit Value Elongation at Break Construction A ASTM D412 or ISO 37, Type 4 dumbell, 200 mm 20 mm/minute % 300
49、 minimum Tensile Strength Construction A ASTM D412 or ISO 37, Type 4 dumbell, 200 mm 20 mm/minute MPa 20 minimum Fuel Resistance Biodiesel Compatible Note 2 Construction A Diesel Application ISO 1817, Diesel fuel to GMW14914, GMNA +80 C 3 C, 168 2 h Elongation at break Tensile strength Change in Mass % MPa % 300 minimum 20 minimum 1 maxi
