1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 3 2014 08 15 Editorial See Summary of Revisions G. Kowalski, NA 2013 08 01 Revised See Summary of Revisions G. Kowalski, NA 2006 09 13 Activated K. Kuenzel Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Pag
2、e 1 of 4 TUBING, HIGH TEMPERATURE POLYAMIDE COVER, WSS-M98D33-A14 ETFE 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 construction consists of a heat, hydrocarbon, water,
3、and chloride resistant outer cover of high temperature polyamide and an inner barrier layer of conductive polyethylene tetrafluoroethylene (ETFE). The adhesion of the inner layer to the outer layer is achieved by use of an appropriate tie layer. 2. APPLICATIONS This specification was originally rele
4、ased 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, and is resistant to kinking. Maximum fuel pressure during use should not exceed 0.6 MPa. Continuou
5、s operating temperatures should not exceed 120 C with maximum intermittent temperature excursions not to exceed 130 C for 48 hours. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material s
6、uppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.2 INITIAL QUALIFICATION Suppliers seeking approval to this specification must meet the initial qualification processes that include evaluating materials and constructions accor
7、ding to the applicable Fuel System Design Specification (SDS) and individual Design Verification Methods (DVM). 3.3 FUEL AND VAPOR LINE PERFORMANCE REQUIREMENTS The requirements listed in this specification represent values based on vehicle operating conditions that do not exceed 0.6 MPa fuel pressu
8、re. If the fuel system is expected to exceed this pressure this construction is not appropriate for these applications. 3.3.1 External CHEMICAL RESISTANCE (SAE J2027b, fluids defined in SAE J2227 or SAE J2027 unless otherwise listed) Fluid Requirement Aggressive Water No cracking after Brake Fluid (
9、DOT 3) exposure in all fluids Ethylene Glycol and impact testing Fuel C (SAE J1681) IRM 903 Oil (ASTM D 5964) Transmission Oil (Mercon V) ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A14 Copyright 2014, Ford Global Technologies, LLC Page 2 of 4 3.3.2 Ozone Resistance 0 Rating (For both inner and ou
10、ter layers) Test Method: Test coupon molded per ISO 527; Precondition in Fuel C if anti-ozonants are present per SAE J1681 for 1000 hours at 60 C. Apply 1% surface strain by securing onto an appropriate curved template utilizing suitable fasteners. The required curvature can be calculated as follows
11、: r = 49.5d r = radius and d = thickness (+/- 0.01mm) Ozone exposure per ASTM D 1149 with the following modifications: a) minimum 50 pphm and b) minimum 40 C and c) minimum 568 hours Inspect and rate per ASTM D 1149 Acceptance criteria: ASTM Zero (0) rating = No cracks and CARB “resistant to ozone“
12、3.3.3 Extractables 2.7 g/m2 maximum (SAE J2260, Appendix) 3.3.4 Burst Pressure (SAE J2260 exposure conditions and burst procedure except as noted) Room temperature burst (As received) 5520 kPa, minimum Room temperature burst (After cold impact) 4140 kPa, minimum Room temperature burst (After kinking
13、) 4140 kPa, minimum High temperature burst (Burst at 130C) 1515 kPa, minimum Room temperature burst (After exposure to zinc chloride, burst after cold impact) 4140 kPa, minimum Room temperature burst (After exposure to calcium chloride - follow % concentration and conditions for zinc chloride, burst
14、 after cold impact) 4140 kPa, minimum Room temperature burst (After heat aging in air, 1000 hours at120 C in air, burst after cold impact) 4140 kPa, minimum Room temperature burst (After heat aging in air, 1000 hours at120 oC +48h at 145 oC, burst after cold impact) 4140 kPa, minimum Room temperatur
15、e burst (After fluid exposure, 1000h, 50mMol/L sour gas at 40 C, fluid mix per SAE J2260 or ISO 4639-3, burst after cold impact) 4140 kPa, minimum Room temperature burst (After fluid exposure, 5000 hours CM15A at 60 C per SAE J1737, recirculation, burst after cold impact) 4140 kPa, minimum ENGINEERI
16、NG MATERIAL SPECIFICATION WSS-M98D33-A14 Copyright 2014, Ford Global Technologies, LLC Page 3 of 4 3.3.5 Cold Impact at -40 C (SAE J2260 exposure and test conditions unless otherwise noted) As received No cracks After exposure to zinc chloride No cracks After exposure to calcium chloride (Follow % c
17、oncentrations and conditions for zinc chloride) No cracks After heat aging in air, 1000 hours at 120 C No cracks After heat aging 1000 hours in air at 120 oC + 48h at 145 C No cracks After 1000h. 50mMol/L sour gas at 40 C (Fluid mix per SAE J2260 or ISO 4639-3) No cracks After 5000 hours CM15A at 60
18、 C (Fluid exposure per SAE J1737, recirculation) No cracks 3.3.6 Adhesion (All constructions) (SAE J2260 exposure and test methods except as noted, spiral or strip adhesion test method) As received (SAE J2260) 1.0 N/mm, minimum After 1000h, 50mMol/L sour gas at 40 C (SAE J2260 or mixing per ISO 4639
19、-3) 1.0 N/mm, minimum After 1000hours in air at 120 C (SAE J2260) 1.0 N/mm, minimum After 5000 hours CM15A, at 60 C (Fluid exposure per SAE J2260, recirculation) 1.0 N/mm, minimum 3.3.7 Fuel Permeability Resistance, As specified in applicable SAE J2260 Category engineering specification (SAE J1737,
20、recirculation) drawing per system Diameters of 12mm or less may be used as requirements surrogate samples for qualification of larger diameter constructions Fuel CE10 40 C isothermal 0 60 C isothermal 1 3.3.8 Kink Resistance Ball must pass freely (SAE J2260) 3.3.9 Dimensional Stability, % length cha
21、nge 4 maximum Longitudinal change from original Test Method: Expose 300 mm of tubing in an air circulating oven (ASTM D 573/ISO 188) for 168 h at 120 +/- 2 C. ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A14 Copyright 2014, Ford Global Technologies, LLC Page 4 of 4 3.3.10 Electrical Resistance, Ohm
22、s/square (SAE J2260) 3.3.10.1 Tubing as received Surface resistively less than or equal to 106 3.3.10.2 After exposure to fuel C for 1000h, at 60 C, kinked and cold impacted Surface resistively less than or equal to 106 3.3.11 Flammability Resistance, Cover Stock Only Self- extinguishing (ISO 3795)
23、within 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 OR 5. SUMMARY OF REVISIONS 2014 08 15 Editorial. Corrected temperature in 2.0 from 145C to 130C. 2013 08 01 - Changed Para 3.3.4 high temp burst temp from 145C to 130C.
