1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev.02 2017 02 27 Revised See summary of revisions A. Reaume/G.Kowalski 2006 09 13 Revised Inserted 3.0; Deleted 3.1,3.2,3.3,3.5, Global Technologies, LLC Page 1 of 6 HOSE, NON-REINFORCED RUBBER, FUEL/ALCOHOL RESISTANT, WSS-M96D33-A7 LOW PERM
2、EATING, CONDUCTIVE, ETFE INNER VENEER LINER/AEM COVER 1. SCOPE This specification defines a conductive, non-reinforced synthetic rubber hose for use as liquid carrying fuel hose. 2. APPLICATION This specification was released originally for hoses used for liquid carrying fuel hose. 3. REQUIREMENTS 3
3、.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources identified on the Ford Approved Source List (ASL) can be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at or avail
4、able externally through a Ford Materials Engineer. 3.2 CONDITIONING AND TEST CONDITIONS All test values are based on material conditioned for not less than 24 h prior to testing in a controlled environment of 23 +/- 2 C and 50 +/- 5% relative humidity. Testing of the material should occur in the con
5、ditioning environment or soon after removal. 3.3 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms from initial material approval shall constitute the reference standard and shall be kept on file at the designated material laboratory. The material supplier shall ensure th
6、at all future material supplied to the specification shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.4 INITIAL QUALIFICATION Suppliers seeking approval to this specification must meet the initial qualification processes that
7、 include evaluating materials and constructions according to the applicable Fuel System Design Specification (SDS) and individual Design Verification Methods (DVM). 3.5 LIMITATIONS Vapor lines can be either conductive or non-conductive. Liquid caring lines must be conductive. This material does not
8、contain UV stabilizers, long term exposure to direct sunlight will cause cracking. All components exposed to direct sunlight must contain UV stabilizers. ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Copyright 2017, Ford Global Technologies, LLC Page 2 of 6 3.6 HOSE CONSTRUCTION The hose shall co
9、nsist of a smooth bore ETFE (ethylene tetrafluoro-ethylene) inner veneer, acting as a fuel barrier and an outer cover of ethylene/acrylic rubber (AEM). 3.7 ADDITIONAL REQUIREMENTS Requirements beyond those explicitly stated in this document and the material specification may be specified on the Engi
10、neering drawing, Engineering specification (ES), performance specification, System Design Specification (SDS) and/or Attribute Requirement List (ARL). 3.8 PERFORMANCE CRITERIA Materials approved to this specification must also be approved to the fuel system polymeric materials performance standard:
11、WSS-M98P14-A2 Veneer/Barrier Cover 3.8.1 Hardness Durometer A N/R 60 70 (ISO 868/ASTM D2240 Instantaneous, plied up Specimen. Hand held Durometers shall not be used) 3.8.2 Tensile Strength, MPa min 30.0 10.0 (ISO 37/ASTM D412, Die C) 3.8.3 Elongation at Break, % min 250 200 (ISO 37/ASTM D412, Die C)
12、 3.8.4 Modulus at 100%, MPa min 20.0 3.0 Elongation ISO 37/ASTM D412, Die C) 3.8.5 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 125 C) 3.8.5.1 Hardness Change N/R +15 max 3.8.5.2 Tensile Strength Change N/R +5 % max 3.8.5.3 Elongation Change N/R -30 % max 3.8.6 Burst Pressure (A
13、STM D380) Hose Size, (Approximate I.D.) Complete Construction Below 9.53 mm 1.02 MPa min 9.53 15.87 mm 0.68 MPa min 15.87 mm and larger 0.34 MPa min ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Copyright 2017, Ford Global Technologies, LLC Page 3 of 6 Complete Construction 3.8.7 Compression Set
14、75 % max (FLTM BP 108-6, 70 h at 100oC, 25% compression) 3.8.8 Electrical Resistance Surface resistivity (SAE J2260) less than or equal to 1 x 106 Ohms 3.8.9 Vacuum Collapse (SAE J30R11) Test Method: For straight hose, a 1 m length of hose or the assembly shall be held in a straight line. On preform
15、ed parts, the vacuum collapse test shall be performed on the finished part. No diameter shall decrease by more than 20 % during the application of vacuum for a minimum of 15 seconds and not more than 60 seconds. Hose sizes as listed below shall be subjected to the corresponding vacuum pressure: Nomi
16、nal hose ID 44.5 mm 10 kPa 20 % max 3.8.10 Ovality 75 % min (Not applicable to hoses with I.D. greater than 16.28 mm, unless otherwise specified on engineering drawing) Ovality = I.D. minimum x 100 I.D. maximum 3.8.11 Resistance to Kinking Ball must pass freely (SAE J30, para 6.20) 3.8.12 Flammabili
17、ty Resistance, Cover Stock Only Self- extinguishing (ISO 3795) within 60 seconds 3.8.13 Hose Identification The colored tracer cord in the reinforcement of the hose may be used for source identification. The color shall be determined between Purchasing and the supplier. The word gas/fuel and the cod
18、ing described below shall appear on the outer cover of the hose in contrasting color and repeated at intervals of 60 mm or less. Mandrel cured hose may be coded once per part. The following format is recommended: a) Supplier identification code. ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Copyr
19、ight 2017, Ford Global Technologies, LLC Page 4 of 6 b) Date of manufacture (week, year) and plant designation if supplier has more than one plant producing hoses to this specification. No space between letters. Mandatory on hoses longer than 80 mm only. c) Ford trademark on hoses longer than 150 mm
20、. d) All of the above printing shall be clearly and legibly printed letters of 4.5 - 6 mm in height and width. When hose is less than 80 mm long, width of letters may be reduced to 3 mm. The following code format is recommended, but not mandatory: G 2 01 Where: G = Plant Designation 2 = Year (single
21、 digit) 01 = Week (2-digit number) 3.9 PERFORMANCE CRITERIA REPORT ONLY Materials approved to this specification must also be approved to the fuel system polymeric materials performance standard: WSS-M98P14-A2 Veneer/Barrier Cover 3.9.1 Hardness International N/R Report (ISO 48/ASTM D1415, micro) 3.
22、9.2 Original Breaking Strength and elongation at Break (Entire Hose Construction, 50 mm/minute) Test Method: Record the I.D. and O.D. of a 150 mm straight length of hose and clamp the hose on suitable fittings in a tensile testing machine to prevent pull-off. Apply gage marks or extensometers to the
23、 hose to measure elongation. Apply a load at a rate of 50 mm/minute until the hose ruptures. Record the force to break the hose and the elongation of the hose at break. Calculate the hose breaking strength by dividing the breaking force by the annular cross-sectional area of the hose wall. Median va
24、lues are to be used for reported values 3.9.2.1 Breaking Strength Report, MPa 3.9.2.2 Elongation at Break Report, % 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Eng
25、ineering Material Specifications. ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Copyright 2017, Ford Global Technologies, LLC Page 5 of 6 4.1 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Develo
26、pment, and Materials Engineering. The supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of the Material Specification. Tested material samples must
27、 be available for review upon request and kept for a minimum of one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and Effects Analysis, Control Plans, Certification testing) with Ford. 4.2 SUPPLIERS ONGOING RESPONSIBILITY All materials mu
28、st be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any changes to the material originally approved, whether or not such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected
29、 Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to
30、the specifications for Design Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.3 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addres
31、sed by this document. The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuing basis through IMDS and or GMAP reporting. 4.4 GENERIC IDENTIFICATION AND MARK
32、ING OF ELASTOMERIC PRODUCTS (ISO 1043/11469) ETFE/AEM 5. SUMMARY OF REVISIONS 2017 02 27 Removed WSS-M99P1111-A and added those requirements directly to this specification. o Para 3.1 approved sources o Para 3.2 conditioning and test conditions o Para 3.3 infrared spectrophotometry and/or thermal an
33、alysis o Para 4.1 Added approval of materials o Para 4.2 Added suppliers ongoing responsibility o Para 4.3 Added restricted substance management standard Para 3.4 Added initial qualifications Para 3.5 Added limitations Para 3.7 Added additional requirements Para 3.9 Added performance criteria report
34、 only Para 3.9.2 Added original breaking strength and elongation at break Para 3.6.2 Removed hardness, durometer D Para 4.4 Added generic identification and marking of elastomeric products ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Copyright 2017, Ford Global Technologies, LLC Page 6 of 6 The
35、following paragraphs are covered in WSS-M98P14-A2 Para 3.8 Removed heat aged (1000 hours) Para 3.9 Removed immersion in fuel C 504 hours, veneer only Para 3.10 Removed immersion in fuel C 24 hours, cover only Pare 3.11 Removed immersion in Fuel C + 25% Methanol 360 hours, veneer only Pare 3.12 Remov
36、ed immersion in Fuel C + 25% Methanol 24 hours, cover only Para 3.13 Removed resistance to oxidized fuel (sour gas) Veneer only Para 3.16 Removed cold flexibility Para 3.17 Removed high temperature resistance Para 3.18 Removed ozone resistance Para 3.21 Removed fuel permeability resistance Para 3.22 Removed compression set Para 3.24 Removed adhesion Para 3.26 Removed installation effort Para 5.1 Removed heat age hose 1000 hours at 150C 2006 09 13 Inserted 3.0; Deleted 3.1,3.2,3.3,3.5, & 4 1996 03 26 Revised
