1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 05 28 Activated G. Gullen Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 9 HOSE, REINFORCED RUBBER, FUEL RESISTANT CONDUCTIVE, WSS-M96D33-A14 LOW PERMEATING (THV/HNBR/AEM) 1. SCOPE This specificati
2、on defines a multi-layer reinforced composite elastomeric hose with a conductive barrier layer on the inner diameter. The construction has low permeation, good resistance to fuel/alcohol blends, and pressure dampening characteristics. The hose consists of an inner conductive layer of tetra vinyliden
3、e fluoride (THV), a layer of hydrogenated nitrile butadiene (HNBR), aramid reinforcement, and a cover of ethylene/acrylic copolymer (AEM). 2. APPLICATION This specification was released originally for fuel feed and return line hoses in the engine compartment. This hose construction may be effective
4、in reducing pressure pulsation in the fuel system, however, each application must be evaluated to determine dampening effectiveness. Cyclic impulse testing on this construction was performed utilizing crimped couplings. Suitability of other couplings for this application must be evaluated prior to u
5、se. This construction has been evaluated at sustained temperatures of 110 C for 3000 hours. (Important Note: This construction is not intended for use where high elongation is required.) 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must con
6、form to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 INITIAL QUALIFICATION Prior to seeking approval to this specification, initial qualification processes include evaluating materials and constructions according to the applicable fuel System Design Specification
7、 (SDS) and individual Design Verification Method (DVM). 3.3 FUEL AND VAPOR LINE PERFORMANCE REQUIREMENTS This specification is a performance-oriented document that may be used as a materials and construction selection guideline, depending upon particular system performance requirements. The minimum
8、requirements listed in this specification represent values based upon historical data from similar products an/or minimum system requirements. Actual values listed under each individual construction are to meet or exceed those minimum requirements using data from actual production articles. Plus or
9、minus 3-sigma data will be required prior to approval of the product to this specification. The following tests, where possible, shall be performed on finished hoses and/or test specimens cut from them in accordance with ASTM D 3183 (cutting knife procedure). ENGINEERING MATERIAL SPECIFICATIONWSS-M9
10、6D33-A14 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 9 3.3.1 External Chemical Resistance of Multi-layer Fuel Tubing (SAE J2027b) Fluid Result Requirement Aggressive Water No cracking No cracking after Brake Fluid No cracking exposure in all fluids Ethylen
11、e Glycol No cracking and impact testing Fuel C No cracking IRM 903 Oil No cracking Transmission Oil No cracking 3.3.2 Ozone Resistance, rating Zero (0) Zero (0) (Cover and interior material) Test Method: Test coupon - flat strips per ASTM D 518; precondition in Fuel C per SAE J1681 for 1000 hours at
12、 60 C; air dry for 24 hours. Pre-stress test coupons with 20% extension per ASTM D 518; ozone expose per ASTM D1149 50 pphm, 40 C, 568 hours; inspect and rate per ASTM D 1171. Ozone classification: i. ASTM Zero (0) rating = CARB “resistant to ozone“ ii. Less than zero rating = CARB “Not resistant to
13、 ozone.“ Only for use in applications protected from exposure to ozone. Result Requirement 3.3.3 Extractables, g/100mL/m2 4 (no flocculants)Report Amount and/ (FLTM BP 154-01) or type 3.3.4 Sequential Fuel Soak CAUTION: This test requires the exposure of hose containing fuel to elevated temperatures
14、. Consult your facilities coordinator and follow appropriate safety guidelines. Test Method: Plug one end of a 300 mm sample of hose and fill with test fuel C M15, in addition performed with Fuel C and CE10. Plug the other end and age for 72 h at 40 C. Drain the fuel from the hose and dry out the ho
15、se for 24 h at 70 C in an explosion proof oven. Repeat the fuel soak/dry-out for a total of 10 consecutive cycles, replacing the fuel at the start of each cycle. At the end of the 10th cycle, perform required performance tests. ENGINEERING MATERIAL SPECIFICATIONWSS-M96D33-A14 Printed copies are unco
16、ntrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 9 3.3.5 High Temperature Resistance (ISO 188/ASTM D 573) Test Method: Plug the ends of 300 mm samples of hose with stainless steel plugs inserted 25 mm into each end of the hose. Age the assemblies in an air circulating over per ISO 18
17、8 (ASTM D 573) for 1000 h at 100 C. Allow the assemblies to cool to room temperature for a period of 16 to 96 hours. After cooling, bend the hose over a mandrel 10X the nominal O.D. of the hose within 4 seconds. No signs of cracks or breaks are permitted on either the I.D. or the O.D. of the hose wh
18、en examined at 7X magnification. For hoses over 17.28 mm ID, prepare strips from the aged hose 13 mm wide. Bend the strips over a 130 +/- 3 mm mandrel cover side outward and examine at 7X for cracking. Result Requirement Bend Test (All constructions, all suffixes) No Cracking No Cracking 3.3.6 Break
19、ing 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 gauge marks or extensometers to the hose to measure
20、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 values are to be us
21、ed for reported values, both original and after aging. Actual Typical for Fuel Fill Application Original Breaking Strength, min (All constructions) (Per Paragraph 3.3.6) 26 5 MPa High Temperature Breaking Strength, min (Exposure in paragraph 3.3.5) 75% 50% original After 10 cycles Sequential Fuel So
22、ak (Exposure in Paragraph 3.3.4) 70% 50% original Original Elongation at Break, % min (Per Paragraph 3.3.6) Non-Reinforced 150% Reinforced 54% 135% High Temperature Elongation at Break, minimum (Exposure in Paragraph 3.3.5) 90% 50% original After 10 cycles Sequential Fuel Soak (Exposure in Paragraph
23、 3.3.4) 75% 50% original ENGINEERING MATERIAL SPECIFICATIONWSS-M96D33-A14 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 9 3.3.7 Burst Pressure, MPa, minimum (ASTM D 380) Hose Size, mm (Approximate ID) Actual Requirement ORIGINAL BURST Below 9.5 (All construc
24、tions) 1.0 9.53 - 15.87 (All constructions) 0.68 15.87 and Larger (All Constructions) 1.0 0.34 Burst After Heat Aging, 1000 hours 100 C in air (ASTM D 573) 115% 75% original Burst After High Temperature Resistance (Exposure in paragraph 3.3.5) 115% 75% original Burst After CM15A, 5000 hours 60 C, 13
25、.8 kPa (SAE J2027, recirculation) 100% 75% original After 10 cycles Sequential Fuel Soak (Exposure in Paragraph 3.3.4) 80% 75% original 3.3.8 Adhesion, min (All constructions) (ASTM D 413/ISO 8033, Strip Method, Type A) Actual Requirement THV to HNBR Original Adhesion Cohesive tear 1.4 kN/m or cohes
26、ive tear After Heat Aging, 1000 hours 100 C in air (ASTM D 573) Cohesive tear No loss of adhesion After High Temperature Resistance, inner tube to barrier (Exposure in paragraph 3.3.5) Cohesive tear No loss of adhesion After CM15A, 5000 hours 60 C, 13.8 kPa (SAE J2027, recirculation) Cohesive tear N
27、o loss of adhesion After 10 cycles Sequential Fuel Soak (Exposure in Paragraph 3.3.6) Cohesive tear No loss of adhesion ENGINEERING MATERIAL SPECIFICATIONWSS-M96D33-A14 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 5 of 9 3.3.9 Fuel Permeability Resistance, g/m2/day As specified in applicable (SAE J1737, recirculation) engineering specification 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 THV/HNBR/Aramid/AEM
