1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 2 2016 01 26 Revised See summary of revisions A. Reaume/G. Kowalski 2011 08 23 Revised Editorial, updated title and scope to include PA612 G. Kowalski, NA 2006 09 06 Activated G. Gullen Controlled document at www.MATS Copyright 2016, For
2、d Global Technologies, LLC Page 1 of 3 TUBING, POLYAMIDE 12 or 612 COVER, EVOH BARRIER, WSS-M98D33-A12 POLYAMIDE 12 INNER TUBE, CONDUCTIVE, HIGH PRESSURE LIQUID, LOW PERMEATING FUEL LINE 1. SCOPE This specification describes the requirements for a multilayered liquid fuel carrying line. The construc
3、tion consists of a heat, hydrocarbon, water, and chloride resistant outer cover of polyamide 12 (PA12) or 612 (PA612), a middle barrier layer of ethylene vinyl alcohol (EVOH), and an inner tube of conductive polyamide 12 (PA12). The adhesion of the middle EVOH layer to the inner and outer layers is
4、achieved by use of an appropriate tie layer. 2. APPLICATIONS This specification was originally released for liquid carrying supply and return fuel lines utilized in passenger car and light truck applications. This construction is sufficiently flexible to allow for ease of forming, assembly, routing,
5、 and is resistant to kinking. Maximum fuel pressure during use should not exceed 0.6 MPa and continuous upper operating temperatures should not exceed 90 C. 2.1 LIMITATIONS The requirements listed in this specification represent values based on vehicle operating conditions that do not exceed 0.6 MPa
6、 fuel pressure. If the fuel system is expected to exceed this pressure the construction is not appropriate for the application. 3. REQUIREMENTS 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
7、 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 AND TEST CONDITIONS All test values are based on material conditioned for not less than
8、 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 SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms from initial material approv
9、al 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 spectra and thermograms that correspond to the reference standard when tested under t
10、he same conditions. 3.4 INITIAL QUALIFICATION ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A12 Copyright 2016, Ford Global Technologies, LLC Page 2 of 3 Suppliers seeking approval to this specification must meet the initial qualification processes that include evaluating materials and constructions
11、 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 material specification may be specified on the Engineering drawing, Engineering speci
12、fication (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 system polymeric materials performance standard: WSS-M98P14-A1. 3.6.1 Burst Pressur
13、e (SAE J2260, Room Temperature Burst, High Temperature Burst) 3.6.1.1 Room temperature burst 5520 kPa min (As received) 3.6.1.2 High temperature burst 1720 kPa min (Burst at 115C) 3.6.2 Kink Resistance Ball must pass freely (SAE J2260, Ovality Requirement) 3.6.3 Dimensional Stability, length change
14、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 Electrical Resistance (SAE J2260, Conductive Tubing) 3.6.4.1 Tubing Surface resistivity (as received) less than or equal to 1 x 106 Ohms 3.6.4.2 After exposu
15、re to Fuel C Surface resistivity (1000 hours at 60oC,) less than or equal to 1 x 106 Ohms 3.6.5 Flammability Resistance, Cover Stock Only Self- extinguishing (ISO 3795) within 60 seconds 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the re
16、quirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 RECYCLING CODES PA12/EVOH/PA12PA612/EVOH/PA12 4.2 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or
17、Product Development, and Materials Engineering. The supplier shall submit a ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A12 Copyright 2016, Ford Global Technologies, LLC Page 3 of 3 completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test fac
18、ility, 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 an
19、d Effects Analysis, Control Plans, Certification testing) with Ford. 4.3 SUPPLIERS ONGOING RESPONSIBILITY All materials must 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 no
20、t such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for E
21、ngineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for Design Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.4 RESTRICTED SUBSTA
22、NCE 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 Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility
23、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 infrared spectrophotometry and/or thermal analysis Added approval of materials Added suppliers ongoing respons
24、ibility Added restricted substance management standard Added initial qualifications Added limitations Added additional requirements Added summary of revisions The following paragraphs are covered in WSS-M98P14-A1 and were deleted from this document. Para 3.3.1 Removed external chemical resistance Pa
25、ra 3.3.2 Removed ozone resistance Para 3.3.3 Removed extractables Para 3.3.4 Removed all requirements except room temp and high temp (115C) burst Para 3.3.5 Removed cold impact Para 3.3.6 Removed adhesion Para 3.3.7 Removed fuel permeability resistance Para 3.3.12 Removed oxidized fuel resistance (sour gas) Para 4. Removed cyclic impulse testing
