1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 09 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.29, 4; Corrected numbering 3 2000 07 20 Editorial No Technical Change APC 1996 12 02 Activated J. Spencer Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC
2、Page 1 of 6 HOSE, NON-REINFORCED RUBBER, FUEL/ALCOHOL WSS-M96D33-A7 RESISTANT, LOW PERMEATING 1. SCOPE This specification defines a non-reinforced synthetic rubber hose for use as fuel vapor and fuel tank fill hose. The construction has a low permeation rate. 2. APPLICATION This specification was re
3、leased originally for hoses used in the vapor management system. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 HOSE CONSTRUCTION The hose shall
4、 consist of a smooth bore ETFE (ethylene tetrafluoro-ethylene) inner veneer, acting as a fuel barrier and an outer cover of ethylene/acrylic rubber. 3.5 PHYSICAL PROPERTIES The following tests where possible, shall be performed on finished hoses and/or test specimens cut from them in accordance with
5、 ASTM D 3183 (cutting knife procedure preferred). Greater variation in test values can be anticipated when evaluating materials that are thinner than recommended by an applicable Industry Standard/Test Method. 3.6 ORIGINAL PROPERTIES Veneer Cover 3.6.1 Hardness, International N/R 65 - 75 (ASTM D 141
6、5, micro) 3.6.2 Hardness, Durometer D 70 - 80 N/A (ASTM D 2240) 3.6.3 Hardness, Durometer A N/R 60 - 70 (ASTM D 2240) 3.6.4 Tensile Strength, MPa, min 30.0 10.0 (ASTM D 412, Die C) 3.6.5 Elongation at Break, %, min 250 200 (ASTM D 412, Die C) ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Printed
7、copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 6 3.6.6 Modulus at 100% Elongation, 20.0 3.0 MPa, min (ASTM D 412, Die C) 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 125 +/- 2 C) Hardness Change, max N/R +15 Tensile Strength Change, %, max N/
8、R +5 Elongation Change, %, max N/R -30 3.8 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 100 +/- 2 C) Hardness Change, max N/R +15 Tensile Strength Change, %, max N/R +15 Elongation Change, %, max N/R -40 3.9 IMMERSION IN ASTM FUEL C, Veneer Only (ISO 1817/ASTM D 471, 504 h at 4
9、0 +/- 2 C) Hardness Change, max N/R Tensile Strength Change, max -10 Elongation Change, %, max -10 Volume Change, %, max +5 3.9.1 Dry Out (24 h at 70 +/- 2 C) (Use specimens from para 3.7) Hardness Change, max N/R Volume Change, max +1 3.10 IMMERSION IN ASTM FUEL C, Cover Only (ISO 1817/ASTM D 471,
10、24 h at 40 +/- 2 C) Hardness Change, max -21 Tensile Strength Change, max -80 Elongation Change, %, max -78 Volume Change, %, max +132 3.10.1 Dry Out (24 h at 70 +/- 2 C) (Use specimens from para 3.7) ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Printed copies are uncontrolled Copyright 2006, Fo
11、rd Global Technologies, LLC Page 3 of 6 Hardness Change, max +1 Volume Change, max -5 3.11 IMMERSION IN 75% FUEL C + 25% METHANOL, Veneer Only (ISO 1817/ASTM D 471, 360 h at 40 +/- 2 C) Hardness Change, max N/R Tensile Strength Change, max -10 Elongation Change, %, max -10 Volume Change, %, max +2 3
12、.11.1 Dry Out (24 h at 70 +/- 2 C) (Use specimens from para 3.12.4) Hardness Change, max N/R Volume Change, max +1 3.12 IMMERSION IN 75% FUEL C + 25% METHANOL, Cover Only (ISO 1817/ASTM D 471, 24 h at 40 +/- 2 C) Hardness Change, max -20 Tensile Strength Change, max -86 Elongation Change, %, max -85
13、 Volume Change, %, max +175 3.12.1 Dry Out (24 h at 70 +/- 2 C) (Use specimens from para 3.12.4) Hardness Change, max -1 Volume Change, max -6 3.13 RESISTANCE TO OXIDIZED FUEL (SOUR GAS), Veneer Only (Fuel according to FLTM AZ 105-01, PN 180) Immersion Time, at 23 +/- 2 C 168 h 500 h 1000 h Tensile
14、Strength Change, max -10 -10 -10 Elongation Change, %, max -10 -10 -10 ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 6 3.14 BURST PRESSURE, min (ASTM D 380) Hose Size, mm Burst Pressure (Approximate I.D.) MPA
15、Below 9.53 1.02 9.53 - 15.87 0.68 15.87 and Larger 0.34 3.15 VACUUM COLLAPSE, max 20% Test Method: The hose shall be subjected to a vacuum of 68 kPa while bent over a mandrel having a diameter of 10 times the nominal O.D. of the hose for a duration of 214 h at 100 +/- 2 C. The outside diameter shall
16、 not be less then 80% of the original. This requirement shall not apply to sizes larger than 15.87 nominal I.D. 3.16 COLD FLEXIBILITY, Hose No cracks or breaks Test Method: A 450 mm length of hose filled with ASTM Fuel C shall be aged for 70 h at 23 C. After aging, the hose shall be drained. Then, h
17、ose together with a mandrel having a diameter 10 times the nominal OD will be conditioned for 70 h at 40 C. The conditioned hose shall show no signs of cracking or disintegration when bent 180 over the mandrel. This flexing shall be accomplished within 4 s. For straight hose over 17.28 mm I.D. and a
18、ll preformed hoses, prepare strips from the Fuel C aged hose 13 mm wide with length to be equal to the developed length of the part. Condition the strips and a 130 +/- 3 mm mandrel for 70 h at -40 C. Bend the strips over the mandrel and examine for cracking. 3.17 HIGH TEMPERATURE RESISTANCE No crack
19、s Test Method: Prepare for oven aging a piece of hose bent into a free loop (approximately 250 mm diameter) until the ends meet. For straight hose over 19.05 mm I.D. and all preformed hoses prepare strips of hose 13 mm wide with length to be equal to the developed length of the part. Age hose or tes
20、t specimens in an air circulating oven for 70 h at 124 +/- 2 C. At the end of the aging period examine for cracks, re-straighten and/or re-loop and examine again noting all conditions. No signs of cracking are permitted when examined with a 7X power glass. 3.18 OZONE RESISTANCE, Cover Rating 0 Test
21、Method: FLTM BP 101-01, Procedure B, after the following sequence: . Expose hose inner diameter to ASTM Fuel C for 48 h at 23 +/- 2 C . Air dry for 70 h at 23 +/- 2 C . Elongate 20% . Pressurize hose to 34.5 kPa ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Printed copies are uncontrolled Copyrig
22、ht 2006, Ford Global Technologies, LLC Page 5 of 6 3.19 OVALITY, min 75% (Not applicable to hoses with I.D. greater than 16.28 mm, unless otherwise specified on engineering drawing) I.D. minimum Ovality - x 100 I.D. maximum 3.20 FIRE RESISTANCE, Cover Self-extinguishing (ISO 3795) in 1 minute 3.21 F
23、UEL PERMEABILITY RESISTANCE, 75 % FUEL C/ 60 C, 13.8 kPa METHANOL 25% 30 g/m2/24 h (SAE J1737, fuel permeation by recirculation) 3.22 COMPRESSION SET, %, max Veneer Cover (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up N/R 85 specimens, 22 h at 120 +/- 2 C) 3.23 COMPRESSIVE SET, max
24、75 (FLTM BP 108-06, 70 h at 100 C, 25% compression) 3.24 Adhesion, min (ASTM D 413, Strip Method, Type A) Veneer to Tube Rubber Tearing 3.25 RESISTANCE TO KINKING (Not applicable to hoses with I.D. greater than 16.28 mm, unless otherwise specified on engineering drawing) Test Method: Insert required
25、 length of hose on test fixture securing each end with metal clamps. When installing hose, it shall be bent within 5 s in the same plane and direction as its free state curvature. Place fixture in an oven at 120 +/- 2 C for 1 h. Remove fixture from oven and within 5 minutes pass a steel ball of spec
26、ified diameter through hose installed on fixture. Ball must pass freely. Nominal I.D., I.D. Limits, Test Sample Ball Diameter Mm mm Length, max mm mm 4.8 3.58/4.34 200 1.68 +/- 0.05 6.4 4.88/6.76 225 2.39 +/- 0.05 7.9 6.91/8.33 300 3.20 +/- 0.05 9.5 8.51/9.91 350 3.96 +/- 0.05 12.7 11.55/13.08 475 5
27、.08 +/- 0.05 15.9 14.60/16.28 690 7.87 +/- 0.05 Sample Selection: Production hose selected for the kink test should represent, as nearly as possible, minimum wall thickness. When recording results include wall thickness, ovality, and dimension “A“ (see above). This dimension is measured while sample
28、 is on the test fixture. ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A7 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 6 of 6 3.26 INSTALLATION EFFORT, max 89 N Tests must be completed satisfactorily with initial production parts for ISIR approval. Parts must be
29、 retested whenever any change is made which may affect part installation effort. Test Method: Cut hose to 41 +/- 2.5 mm length and immerse one end in 20W oil (ESE-M2C101-C) to approximately 6.4 mm depth. Immediately install hose on the test fixture with lubricated end inserted over SAE J962 Style A
30、formed tube to an engagement of 19 mm. Test load application shall not exceed 1 minute. Installation not to exceed 89 N. Nominal Diameter A Diameter B Diameter C (Reference) mm +/- 0.05 mm +/- 0.08 mm +/- 0.08 4.8 Ref. SAE 3.58 9.55 6.4 Ref. SAE 5.33 11.81 7.9 Ref. SAE 6.91 14.68 9.5 Ref. SAE 8.51 1
31、5.67 19.1 22.5 18.3 26.2 31.8 35.5 32.0 40.9 38.1 42.2 38.0 47.1 44.5 48.9 44.0 53.3 Test Method: Elongate a minimum 150 mm length of hose marked with 25 mm gage length to 135% (59 mm between gage marks) at a rate of 500 mm/minute. Remove from fixture and examine for cracks or breaks. None are allow
32、ed. Proof pressure test at 35 kPa of water or air under water may alternatively be used after 135% elongation to indicate pass or fail. Use production hose clamps and mandrels simulating production tube end form. 3.27 HOSE IDENTIFICATION The colored tracer cord in the reinforcement of the hose may b
33、e used for source identification. The color shall be determined between Purchasing and the supplier. The word gas/fuel and the coding described below shall appear on the outer cover of the hose in contrasting color and repeated at intervals of 60 mm or less. Formed hose may be coded once per part. T
34、he following format is recommended: Example Date: January 8, 1987 XX 00 7 A 08 A Shift (A-first, B-second, C-third) optional Day (2 digit number) Month (letter I not to be used) Year (single digit) Plant Designation (when necessary) Supplier Identification 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 Heat Aged, Hose (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 150 +/- 2 C) 5.2 Elongation Change, %, max -50%
