1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 09 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.26 Fixed numbering in 3.12 1998 04 03 Revised Revised 3.8 3.12 and 3.20 J. Spencer 1997 08 18 Activated J. Spencer Printed copies are uncontrolled Copyright 2006, Ford Global Technolog
2、ies, LLC Page 1 of 6 HOSE, REINFORCED RUBBER, REFORMULATED FUEL WSS-M96D33-A8 RESISTANT CONDUCTIVE, LOW PERMEATING 1. SCOPE This specification defines a reinforced barrier layer hose with good resistance to reformulated fuel blends and low permeation. 2. APPLICATION This specification was released o
3、riginally for fuel tank filler and vent hoses. The hose continuous use temperature should not exceed 82 C. 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-M99P111
4、1-A). 3.4 HOSE CONSTRUCTION The hose shall consist of an inner tube of nitrile rubber (NBR), a middle layer of tetrafluoroethylene hexafluoropropylene vinylidene fluoride (THV), acting as a fuel barrier, a second layer of NBR, one ply of braided, knit, or spiral woven fabric, and a nitrile/ polyviny
5、l chloride (NBR/PVC) cover. 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 ASTM D 3183 (cutting knife procedure preferred). Greater variation in test values can be anticipated when evaluating mat
6、erials that are thinner than recommended by an applicable Industry Standard/Test Method. 3.6 ORIGINAL PROPERTIES Tube Barrier Cover 3.6.1 Hardness, International 63 75 85 95 60 - 70 (ISO 48/ASTM D 1415, micro) 3.6.2 Hardness, Durometer D N/A 51 61 N/A (ISO 868/ASTM D 2240) 3.6.3 Hardness, Durometer
7、A 63 75 N/A 60 - 70 (ISO 868/ASTM D 2240) 3.6.4 Tensile Strength, MPa, min 6.9 12.0 5.5 (ISO 37/ASTM D 412, Die C) 3.6.5 Elongation at Break, %, min 200 300 200 (ISO 37/ASTM D 412, Die C) ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A8 Printed copies are uncontrolled Copyright 2006, Ford Global Tec
8、hnologies, LLC Page 2 of 6 Tube Barrier Cover 3.6.6 Compression Set 90 N/A 45 (ISO 815/ASTM D 395, Method B, except 25% compression, plied- up specimens, 22 h at 82 +/- 2 C) 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 82 +/- 2 C) 3.7.1 Tensile Strength Change, %, -50 N/R -
9、50 max 3.7.2 Elongation Change, %, max -50 N/R -50 3.8 IMMERSION IN ASTM FUEL C, Cover Only (ISO 1817/ASTM D 471, 24 h at 40 +/- 2 C) 3.8.1 Hardness Change, max -30 3.8.2 Tensile Strength Change, max -45 3.8.3 Elongation Change, %, max -50 3.8.4 Volume Change, %, max 75 3.8.4.1 Dry Out (24 h at 70 +
10、/- 2 C) (Use specimens from para 3.8) Hardness Change, max 30 Volume Change, max -30 3.9 IMMERSION IN ASTM FUEL C, Tube Only (ISO 1817/ASTM D 471, 360 h at 40 +/- 2 C) 3.9.1 Hardness Change, max -25 3.9.2 Tensile Strength Change, max -30 3.9.3 Elongation Change, %, max -30 3.9.4 Volume Change, %, ma
11、x 40 3.9.4.1 Dry Out (24 h at 70 +/- 2 C) (Use specimens from para 3.9) Hardness Change, max 20 Volume Change, max -20 3.10 IMMERSION IN 85% FUEL C +15% METHANOL, Cover Only (ISO 1817/ASTM D 471, 24 h at 40 +/- 2 C) 3.10.1 Hardness Change, max -30 3.10.2 Tensile Strength Change, max -55 ENGINEERING
12、MATERIAL SPECIFICATION WSS-M96D33-A8 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 6 3.10.3 Elongation Change, %, max -45 3.10.4 Volume Change, %, max 85 3.10.4.1 Dry Out (24 h at 70 +/- 2 C) (Use specimens from para 3.10) Hardness Change, max 30 Volume Chan
13、ge, max -35 3.11 IMMERSION IN 85% FUEL C +15% METHANOL, Tube Only (ISO 1817/ASTM D 471, 360 h at 40 +/- 2 C) 3.11.1 Hardness Change, max 40 3.11.2 Tensile Strength Change, max -40 3.11.3 Elongation Change, %, max -35 3.11.4 Volume Change, %, max 75 3.11.4.1 Dry Out (24 h at 70 +/- 2 C) (Use specimen
14、s from para 3.11) Hardness Change, max 20 Volume Change, max -20 3.12 IMMERSION IN 85 % FUEL C +15% MTBE, Tube Only (ISO 1817/ASTM D 471, 360 h at 40 +/- 2 C) 3.12.1 Hardness Change, max 10 3.12.2 Tensile Strength Change, max -30 3.12.3 Elongation Change, %, max -30 3.12.4 Volume Change, %, max 55 3
15、.12.4.1 Dry Out (24 h at 70 +/- 2 C) (Use specimens from para 3.12) Hardness Change, max 20 Volume Change, max -20 3.13 OZONE RESISTANCE, Cover Rating 0 (ASTM D 1149, 50 pphm ozone, 168 h, 38 +/- 2 C) 3.14 BURST PRESSURE, min (ASTM D 380) Hose Size, mm Burst Pressure (Approximate ID) MPa ENGINEERING
16、 MATERIAL SPECIFICATION WSS-M96D33-A8 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 6 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 mandr
17、el having a diameter of 10 times the nominal O.D. of the hose for a duration of 24 h at 100 +/- 2 C. The outside diameter shall not be less than 80% of the original. This requirement shall not apply to sizes larger than 15.87 nominal ID. 3.16 COLD FLEXIBILITY, Hose No cracks or breaks Test Method: A
18、 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, hose 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 disintegr
19、ation when bent 180 over the mandrel. This flexing shall be accomplished within 4 s. For straight hose over 17.28 mm ID and all 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 ma
20、ndrel for 70 h at -40 C. Bend the strips over the mandrel and examine for cracking. 3.17 OVALITY, min 75% (Not applicable to hoses with I.D. greater than 16.28 mm, unless otherwise specified on engineering drawing) I.D. min Ovality = - x 100 I.D. max 3.18 FIRE RESISTANCE, Cover Self-extinguishing (I
21、SO 3795) in 1 minute 3.19 FUEL PERMEABILITY RESISTANCE, 85% FUEL C/ 15% METHANOL (SAE J1737, fuel permeation by recirculation) 40 C, 13.8 kPa 40 g/m2/24 h 60 C, 13.8 kPa 60 g/m2/24 h 3.20 ADHESION, min (ASTM D 413, Strip Method, Type A) Barrier to Tube Rubber tearing Tube to Cover 1.4 kN/m 3.21 RESI
22、STANCE TO KINKING (Not applicable to hoses with I.D. greater than 16.28 mm, unless otherwise specified on engineering drawing) ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A8 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 6 Test Method: Insert required lengt
23、h 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 specified
24、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 3.95 +/- 0.05 12.7 11.55/13.08 475 5.0
25、8 +/- 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, min wall thickness. When recording results include wall thickness, ovality, and dimension “A“ (see above). This dimension is measured while sample is on
26、 the test fixture. 3.22 INSTALLATION EFFORT, max 89 N Tests must be completed satisfactorily with initial production parts for PPAP approval. Parts must be retested whenever any change is made which may affect part installation effort. ENGINEERING MATERIAL SPECIFICATION WSS-M96D33-A8 Printed copies
27、are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 6 of 6 Test Method: Cut hose to 41 +/- 2.5 mm length and immerse one end in 20 W 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 forme
28、d 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 15.67
29、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 3.23 HOSE ELONGATION, min 135% Test Method: Elongate a min 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
30、breaks. None are allowed. 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. 3.24 ELECTRICAL RESISTANCE Surface resistivity less than or (FLTM
31、 BP 108-10) equal to 106 ohms 3.25 HOSE IDENTIFICATION 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. Mandrel cured hose may be coded once per part. The following format is recommended: a)
32、Supplier identification code. b) Date of manufacture (week, year) and plant designation if supplier has more then one plant producing hoses to this specification. No space between letters. Mandatory on hoses longer then 80 mm only. c) Ford trademark on hoses longer then 150 mm. d) All of the above printing shall be clearly and legibly printed letters of 4.5 - 6 mm in height and width. When hose is less then 80 mm long, width of letters may be reduced to 3 mm.
