1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 24 N-STATUS No replacement named C. Mracna, NA 2006 08 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.18 & 4 1994 02 01 Released NC00E10244441 021 John Spencer Printed copies are uncontrolled Copyright 2010, Ford Global Technologies
2、, LLC Page 1 of 5 HOSE, REINFORCED RUBBER, FUEL RESISTANT WSA-M96D19-A2 NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines a reinforced synthetic rubber hose with good resistance to fuel. 2. APPLICATION This specification was released originally for fuel tank filler when used as an in
3、ner fill hose. 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 consist of a smooth bore, nitrile synthetic rubbe
4、r tube reinforced with one or more piles of braided, knit, spiral or woven fabric covered with the same fuel resistant synthetic rubber as used for the tube material. 3.5 BURST PRESSURE, min (ASTM D 380) Hose Size, mm Burst Pressure (Approximate I.D.) MPa Below 9.53 1.72 9.53 - 15.87 1.20 15.87 and
5、larger 0.34 3.6 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 not be less than 80% of the original. This r
6、equirement shall not apply to sizes larger than 15.87 nominal I.D. 3.7 COLD FLEXIBILITY, Hose No cracks or breaks Test Method: A 450 mm length of hose filled with 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 ti
7、mes the nominal O.D. 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 four seconds. For straight hose over 17.28 mm I.D. and all preformed hoses, prepare strips from
8、 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 over 70 h at -40 C. Bend the strips over the mandrel and examine for cracking. ENGINEERING MATERIAL SPECIFICATIONWSA-M96D19-A2 Printed copies are uncontrolled
9、 Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 3.8 HIGH TEMPERATURE RESISTANCE No cracksTest 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 stri
10、ps of hose 13 mm wide with length to be equal to the developed length of the part. Age hose or test specimens in an air circulating oven for 70 h at 124 +/- 2 C. At the end of the aging period examine for cracks, restraighten and/or reloop and examine again noting all conditions. No signs of crackin
11、g are permitted when examined with a 7X power glass. 3.9 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 3.10 PHYSICAL PROPERTIES 3.10.1 Original Properties Tube and Cover Hardne
12、ss, International 60 - 70 (ISO 48/ASTM D 1415) Hardness, Durometer A 65 - 75 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) Tensile Strength, min 8.6 MPa (ISO 37/ASTM D 412, Die C) Elongation at Break, min 200% (Test Method according to para 3.5.4) Mo
13、dulus at 100% Elongation 1.9 MPa (Test Method according to para 3.5.4) 3.10.2 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 125 +/- 2 C) Hardness Change, max +20 Tensile Strength Change, max -10% Elongation Change, max -65% Visual Evaluation No surface tackiness or cracks when fo
14、lded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSA-M96D19-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.10.3 Immersion in Fuel C (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) Hardness Change, max -15 Tensile Strength Change, max -40% Elongati
15、on Change, max -40% Volume Change +35% Visual Evaluation No surface tackiness or cracks when folded flat against itself) 3.10.3.1 Dry Out (24 h at 70 +/- 2 C) Hardness Change, max +25 Volume Change, max -25% (Use specimens from 3.10.3) Tube and Cover 3.10.4 Immersion in 85% Fuel C +15% Methanol (ISO
16、 1817/ASTM D 471, 70 h at 23 +/- 2 C) Hardness Change, max -20 Tensile Strength Change, max -40% Elongation Change, max -40% Volume Change +50% Visual Evaluation No surface tackiness or cracks when folded flat against itself) 3.10.4.1 Dry Out (24 h at 70 +/- 2 C) Hardness Change, max +25 Volume Chan
17、ge, max -25% (Use specimens from 3.10.4) 3.10.5 Compression Set, max 50% (ASTM D 395, Method B, plied-up specimens, 22 h at 120+/- 2 C) 3.10.6 Adhesion, min 1 kN/m (ASTM D 413, Strip Method, Type A) ENGINEERING MATERIAL SPECIFICATIONWSA-M96D19-A2 Printed copies are uncontrolled Copyright 2010, Ford
18、Global Technologies, LLC Page 4 of 5 3.11 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 length of hose on test fixture securing each end with metal clamps. When installing hose, it shall
19、 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 diameter through hose installed on fixture. Ball must pass freely. Nominal I.D., I.D. Limits
20、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 5.08 +/- 0.05 15.9 14.60 - 16.28 690 7.87 +/- 0.05 Sample Selection: Production hose select
21、ed 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 is on the test fixture. 3.12 INSTALLATION EFFORT, max 89 N Tests must be completed sati
22、sfactorily within initial production parts for ISIR approval. Parts must be 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 h
23、ose on the test fixture with lubricated end inserted over SAE J962, Style A formed tube to an engagement of 19 mm. Test load application shall not exceed 1 minute. ENGINEERING MATERIAL SPECIFICATIONWSA-M96D19-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of
24、5 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 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 3.17 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. Formed hose may be coded once per part. The following format is recommended:
