1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 08 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.4, 3.19 & 4 1994 03 31 Revised C10348585 Renumbered 3.8 3.13 B. Hennessey 1988 04 13 Released SM/ER 3740 TC B. Hennessey Printed copies are uncontrolled Copyright 2006, Ford Global Technolo
2、gies, LLC Page 1 of 4 TUBE, PVC/NITRILE (PVC/NBR) RUBBER- WSD-M96D20-A UN-REINFORCED, OXYGENATED FUEL RESISTANT 1. SCOPE The material defined by this specification is a long-life, un-reinforced rubber fuel tube. 2. APPLICATION This specification was released originally for a tube used as a flexible
3、connection between the fuel tank and body-mounted filler-neck. The material has good resistance to oxygenated fuels and ozone, and moderate resistance to oxidised (sour) fuel. It will withstand normal operating temperatures up to 80 C and remains flexible at -40 C when filled with fuel. 3. REQUIREME
4、NTS 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). 3.5 The following tests where possible, shall be performed on finished tubes and/or test specimens cut from them
5、in accordance with 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 TUBE CONSTRUCTION The tube shall consist of a smooth bore, fuel resi
6、stant rubber extruded and shaped if necessary, or injection molded to the requirements of the Engineering Drawing. 3.7 ORIGINAL PROPERTIES 3.7.1 Hardness, International 65 - 75 (ISO 48, micro) 3.7.2 Tensile Strength, min 10.0 MPa (ISO 37, Type 1 Dumbell) 3.7.3 Elongation at Break, min 250% (Test Met
7、hod According to 3.7.2) 3.7.4 Modulus at 100% Elongation, min 3.0 to 4.5 MPa (Test Method According to 3.7.2) 3.7.5 Compression Set, max 50% (Or 65% (ISO 815, Sample A except Copper 25% compression. Plied-up specimens) Crystallisation Test (3.15) is required.) ENGINEERING MATERIAL SPECIFICATION WSD-
8、M96D20-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 4 3.8 HEAT AGED (ISO 188, 150 +/- 50 air changes/h 1000 h at 80 +/- 2 C) 3.8.1 Hardness, International, max 90 3.8.2 Tensile Strength, min 10.0 MPa 3.8.3 Elongation at Break, min 150% 3.8.4 Visual Evalua
9、tion No surface tackiness or cracks when folded flat against itself. 3.9 HEAT AGED (ISO 188, 150 +/- 50 air changes/h 168 h at 100 +/- 2 C) 3.9.1 Hardness, International, max 90 3.9.2 Tensile Strength, min 10 MPa 3.9.3 Elongation at Break, min 150% 3.9.4 Visual Evaluation No surface tackiness or cra
10、cks when folded flat against itself. 3.10 IMMERSION IN FUEL C (ISO 1817, 70 h at 23 +/- 2 C) 3.10.1 Hardness, International, min 45 3.10.2 Tensile strength, min 8 MPa 3.10.3 Elongation at Break, min 150% 3.10.4 Volume Change, max +40% 3.10.5 Shrinkage After Drying, max -20% Method: After measuring t
11、he volume swell, the test samples shall be dried at 80 C for 24 hr after which the volume change is again determined. 3.11 IMMERSION IN 85% FUEL C +15% METHANOL (ISO 1817, 70 h at 23 +/- 2 C) 3.11.1 Hardness, International, min 40 3.11.2 Tensile Strength, min 6 MPa 3.11.3 Elongation at break, min 15
12、0% 3.11.4 Volume Change, max +50% ENGINEERING MATERIAL SPECIFICATION WSD-M96D20-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 4 3.11.5 Shrinkage after Drying, max -20% Method: As 3.10.5 3.12 IMMERSION IN OXIDIZED FUEL (SOUR GAS) (FLTM AZ 105-01, PN 90, 14
13、days at 60 +/- 2 C, Replace Fluid after 7 days. Test immediately after removal from fluid) 3.12.1 Hardness, International, min 40 3.12.2 Tensile Strength, min 3 MPa 3.12.3 Elongation at Break, min 100% 3.12.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.13 IMME
14、RSION IN OIL 3 (ISO 1817, 70 h at 100 +/- 2 C) 3.13.1 Hardness, International, max 85 3.13.2 Tensile Strength, min 10 MPa 3.13.3 Elongation at Break, min 200% 3.13.4 Volume Change, max +/- 10% 3.14 COLD FLEXIBILITY AT - 40 C No cracks or breaks (FLTM BN 102-01, Procedure B) when viewed under 7 X mag
15、nification Use plugged tube filled with Fuel C +15% Methanol for 70 h at 23 +/- 2 C. 3.15 OZONE RESISTANCE, max Rating 0 (FLTM BP 101-01) 3.15.1 After conditioning in Fuel C +15% Methanol Completely immerse suitable lengths of tube in 85% Fuel C +15% Methanol for 48 h at 23 +/- 2 C after which they
16、are dried by suspending vertically in a well ventilated area for a further 48 h at 23 +/- 2 C. 3.16 CRYSTALLINE COPPER SALT FORMATION No Crystal (To be carried out only if specified on formation on the Engineering Drawing) the rubber or copper strip Method: ASTM D 130 (Automotive Gasoline Method), e
17、xcept use 150 mL Fuel C +15% Methanol in a 200 mL test-tube. Mount 75 x 12.5 x 2 mm rubber sample parallel to but held 10 mm away from the copper strip. Age for 168 h at 23 +/- 2 C. ENGINEERING MATERIAL SPECIFICATION WSD-M96D20-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologi
18、es, LLC Page 4 of 4 3.17 BURST PRESSURE, min 0.3 MPa (ASTM D 380) 3.18 FLAMMABILITY Self extinguishing (ISO 3795) in 1 minute 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 FUEL PERMEABILTY RESISTANCE OF HOSES Approx. 200 gm/m2/24 h (SAE J30, except 85% ASTM Fuel C + 15% Methanol for 21 days.)
