1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 2 2016 01 26 Revised See summary of revisions A. Reaume/G.Kowalski, NA 2011 06 16 Revised Added PA 612 as option for cover in Title and Scope A. Reaume, FNA 2006 01 06 Activated G. Gullen Controlled document at www.MATS Copyright 2016, F
2、ord ; Global Technologies, LLC Page 1 of 3 TUBING, POLYAMIDE 12 OR 612 COVER, EVOH BARRIER, WSS-M98D33-A11 POLYAMIDE 12 INNER TUBE, NON-CONDUCTIVE, LOW PRESSURE VAPOR, LOW PERMEATING FUEL LINE 1. SCOPE This specification describes the requirements for a multilayered vapor fuel carrying line. The con
3、struction consists of a heat, hydrocarbon, water, and chloride resistant outer cover of polyamide 12 (PA12) or polyamide 6/12 (PA612), a middle barrier layer of ethylene vinyl alcohol (EVOH), and an inner tube of polyamide 12 (PA12). The adhesion of the middle EVOH layer to the inner and outer layer
4、s is achieved by use of an appropriate tie layer. 2. APPLICATIONS This specification was originally released for fuel vapor and vent lines utilized in passenger car and light truck applications. This construction is sufficiently flexible to allow for ease of forming, assembly, routing, and is resist
5、ant to kinking. Maximum fuel pressure during use should not exceed 0.2 MPa and continuous upper operating temperatures should no 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 fuel pressure.
6、 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 when this spec
7、ification 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 24 h prior to
8、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 approval shall consti
9、tute 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 the same conditi
10、ons. 3.4 INITIAL QUALIFICATION ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A11 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 according to t
11、he 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 specification (ES),
12、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 Pressure (SAE J2260, Ro
13、om Temperature Burst, High Temperature Burst) 3.6.1.1 Room temperature burst 1200 kPa min (As received) 3.6.1.2 High temperature burst 450 kPa min (Burst at 90C) 3.6.2 Kink Resistance Ball must pass freely (SAE J2260, Ovality Requirement) 3.6.3 Dimensional Stability, length change 4 % max (Expose 30
14、0 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) within 60 seconds 4. GENERAL INFORMATION The information given below is provided for clarification and
15、 assistance in meeting the requirements 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 interes
16、t 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 facility, demonstrating full compliance with all the requirements of the Material
17、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 Effects Analysis, Control Plans, Certification testing) with Ford. ENGINEERIN
18、G MATERIAL SPECIFICATION WSS-M98D33-A11 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 approval was originally granted. Prior to making any changes to the material origi
19、nally 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 Engineering activities of the proposed changes (with reasons) by submission of a comp
20、leted 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 (PV) and Production Part Approval Process (PPAP) sign off must be kept until
21、 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 Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is
22、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 Para 3.1 Added approved sources Para 3.2 Added conditioning and test conditions Para 3.3 Added infrared spectrophotometry and/or thermal analysis Par
23、a 3.4 Added approval of materials Para 3.5 Added suppliers ongoing responsibility Para 3.6 Added restricted substance management standard Para 3.7 Added initial qualifications Para 3.8 Added limitations Para 3.9 Added additional requirements The following paragraphs are covered in WSS-M98P14-A1 Para
24、 3.3.1 Removed external chemical resistance Para 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 3.3.11 Removed oxidized fuel resistance (sour gas) Para 3.4 Removed cyclic impulse testing 2011 06 24 Added PA612 cover material option due to PA12 shortage.
