1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 4 2016 01 26 Revised See summary of revisions A. Reaume/G. Kowalski, NA 1995 04 05 Activated C. Thomas Controlled document at www.MATS Copyright 2016, Ford Global Technologies, LLC Page 1 of 3 TUBING, ALLOYED POLYAMIDE COVER, FEP INNER W
2、SS-M98D33-A7 TUBE, NON-CONDUCTIVE, LOW PERMEATING FUEL VAPOR LINE 1. SCOPE These specifications define multilayered fuel and vapor lines comprised of a heat, hydrocarbon, water, and chloride resistant outer cover of polyamide or alloyed polyamide or equivalent material. The cover is well adhered to
3、a low fuel permeability and fuel/alcohol blend resistant inner tube such as conductive or non-conductive fluorinated ethylene propylene (FEP) or equivalent material. This construction is sufficiently flexible for ease of forming, assembly, and routing, and is resistant to kinking. 2. APPLICATIONS Th
4、ese specifications were released originally for electrically non-conductive fuel vapor (WSS-M96D33- A7) and electrically conductive supply and return liquid carrying fuel lines (WSS-M96D33-A8) where low permeation is required in light truck and passenger car applications. The maximum working pressur
5、e is 1000 kPa at 23 C. This tubing is designed to be used through a temperature range of -40 to +125 C with sustained operation at 125 C for 1000 hours and intermittent temperature excursions up to 150 C for 50 hours. This fuel line will meet the requirements for both reformulated and flexible fuels
6、. Note: The construction and performance properties of the WSS-M96D33-A7 and A8 are essentially the same except for inner tube electrical conductivity in the A8. Liquid fuel carrying applications must use the A8. 3. REQUIREMENTS 3.1 APPROVED SOURCES This specification requires the use of approved so
7、urces. 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 available externally through a Ford Materials Engineer. 3.2 CONDITIONING AN
8、D 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 conditioning environment or soon after removal. 3.3 INFRARED SPECTROPHOTO
9、METRY 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 that all future material supplied to the specification shall produce IR
10、spectra and thermograms that correspond to the reference standard when tested under the same conditions. ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A7 Copyright 2016, Ford Global Technologies, LLC Page 2 of 3 3.4 INITIAL QUALIFICATION Suppliers seeking approval to this specification must meet the
11、 initial qualification processes that include evaluating materials and constructions according to the applicable Fuel System Design Specification (SDS) and individual Design Verification Methods (DVM). 3.5 ADDITIONAL REQUIREMENTS Requirements beyond those explicitly stated in this document and the m
12、aterial specification may be specified on the Engineering drawing, Engineering specification (ES), performance specification, System Design Specification (SDS) and/or Attribute Requirement List (ARL). 3.6 PERFORMANCE CRITERIA Materials approved to this specification must also be approved to the fuel
13、 system polymeric materials performance standard: WSS-M98P14-A1 3.6.1 Burst Pressure (SAE J2260, Room Temperature Burst, High Temperature Burst) 3.6.1.1 Room temperature burst 3500 kPa min (As received) 3.6.1.2 High temperature burst 1000 kPa min (Burst at 90C) 3.6.2 Kink Resistance Ball must pass f
14、reely (SAE J2260, Ovality Requirement) 3.6.3 Dimensional Stability, length change 4 % max (Expose 300 mm of tubing in an air circulating oven (ASTM D 573/ISO 188) for 168 h at 120 +/- 2 C., measure at room temperature) 3.6.4 Flammability Resistance, Cover Stock Only Self- extinguishing (ISO 3795) wi
15、thin 60 seconds 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 RECYCLING CODES PA/FEP 4.2 APPROVAL OF MATERIALS Suppliers des
16、iring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, 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 facil
17、ity, demonstrating full compliance with all the requirements of the Material Specification. Tested material samples must 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
18、Effects Analysis, Control Plans, Certification testing) with Ford. ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A7 Copyright 2016, Ford Global Technologies, LLC Page 3 of 3 4.3 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in all characteristics to the material upon which approv
19、al 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 Supplier Technical Assistance (STA), Purchasing, and Materials Engineeri
20、ng 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 the specifications for Design Verification (DV), Production Verification
21、(PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.4 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addressed by this document. The restrictions are identified in the Restricted S
22、ubstance 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. 5. SUMMARY OF REVISIONS 2016 01 26 Added approved sources Added conditioning and test conditions Added infra
23、red spectrophotometry and/or thermal analysis Added approval of materials Added suppliers ongoing responsibility Added restricted substance management standard Added initial qualifications Added limitations Added additional requirements Added flammability resistance, cover stock only Added summary o
24、f revisions The following paragraphs are covered in WSS-M98P14-A1 and were deleted from this document. Para 3.5.1 Removed peel strength Para 3.5.4 Removed resistance to chlorides Para 3.5.6 Removed burst test kinked tubing Para 3.5.7 Removed cold impact resistance Para 3.5.9 Removed 65% fuel C + 20% methanol + 15% MTBE fuel resistance Para 3.5.10 Removed 858% fuel C + 15% methanol fuel resistance Para 3.5.11 Removed oxidized fuel resistance (sour gas) Para 3.5.12 Removed permeation testing
