1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 24 N-STATUS No replacement named C. Mracna, NA 2006 08 30 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 4.10 & 5 1997 12 01 Activated B. Hennessey Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 7
2、 HOSE, NITRILE (NBR) OR PVC/NITRILE (PVC/NBR) WSD-M96D32-A RUBBER, EXTERNALLY REINFORCED OXYGENATED FUEL RESISTANT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an externally fabric braid reinforced nitrile or PVC/nitrile rubber hose. 2. APPLICATION This specif
3、ication was released originally for material used as hose for fuel lines with clipped or unclipped connections, particularly in territories where methanol containing fuels may be encountered. The resistance to oxidized (“Sour Fuels“) is poor compared with fluoro-elastomer-veneered hoses but is suita
4、ble for use where exposure to oxidized fuels will not be significant. The hose is also suitable for use where it will be exposed to fuel vapor only. However, the hose is not as resistant to fuel permeability as a hose veneered internally with fluoro-elastomer. If a non-copper staining grade is requi
5、red, para 3.13 should be specified on the engineering drawing. However, it should be noted that this property is at the expense of poor compression set. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requ
6、irements For Production Materials (WSS-M99P1111-A). 3.4 CONSTRUCTION The hose consists of a smooth bore tube of nitrile (NBR) or PVC/ nitrile (PVC/NBR) rubber material, reinforced externally with one or more plies of a suitable braided textile fabric. The reinforcement contains colored tracer thread
7、s for identification of the supplier as agreed between Ford Motor Company and the supplier. The cut ends of the hose shall be bonded or otherwise treated to reduce fraying of the reinforcement. 3.5 MATERIAL TESTING 3.5.1 Preparation of Test Specimens Whenever possible, all test specimens shall be di
8、e-cut from the finished parts and buffed or slit to the appropriate thickness. When not feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent state of cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 15
9、0 mm, min x 2.0 +/- 0.2 mm ENGINEERING MATERIAL SPECIFICATIONWSD-M96D32-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 7 3.6 ORIGINAL PROPERTIES 3.6.1 Hardness, International 60 - 75 IRHD (ASTM D145) 3.6.2 Tensile Strength, min 9 MPa (ISO 37/ASTM D 412, Die
10、 C) 3.6.3 Elongation at Break, min 400% (Test method according to para 3.6.3) 3.6.4 Modulus at 100% Elongation 2.5 - 4.0 MPa (Test method according to para 3.6.3) 3.6.5 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.6.6 Compression Set, max 45% (ISO 815/ASTM D 395, Method B, except 2
11、5% compression, plied-up specimens, 60% (If para 24 h at 100 +/- 2 C) 3.13 specified) 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 100 +/- 2 C) 3.7.1 Hardness Change, max +20 (90 IRHD max) 3.7.2 Tensile Strength Change, max -40% 3.7.3 Elongation at Break Change, max -60% 3.7
12、.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C) 3.8.1 Hardness Change, max +15 3.8.2 Tensile Strength Change, max -30% 3.8.3 Elongation at Break Change, max -50% 3.8.4 Visual Evalu
13、ation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSD-M96D32-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 7 3.9 IMMERSION IN OIL IRM 903 (ISO 1817/ASTM D 471, 70 h at 100 +/- 2 C) 3.9.1 Hardness Change
14、, max -20 3.9.2 Tensile Strength Change, max -30% 3.9.3 Elongation at Break Change, max -35% 3.9.4 Volume Change, max +10% 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 IMMERSION IN FUEL C (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) 3.10.1 Hardness Change
15、, max -25 3.10.2 Tensile Strength Change, max -50% 3.10.3 Elongation at Break Change, max -40% 3.10.4 Volume Change, max +40% 3.10.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself) 3.11 IMMERSION IN 85% FUEL C +15% METHANOL (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C)
16、3.11.1 Hardness Change, max -30 3.11.2 Tensile Strength Change, max -60% 3.11.3 Elongation at Break Change, max -50% 3.11.4 Volume Change, max +50% 3.11.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself) 3.12 IMMERSION IN 85% METHANOL +15% FUEL C (ISO 1817/ASTM D 471
17、, 70 h at 23 +/- 2 C) 3.12.1 Hardness Change, max -25 3.12.2 Tensile Strength Change, max -50% 3.12.3 Elongation at Break Change, max -30% ENGINEERING MATERIAL SPECIFICATIONWSD-M96D32-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 7 3.12.4 Volume Change, ma
18、x +20% 3.12.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.13 CRYSTALLINE COPPER SALT FORMATION No crystal (To be carried out only if specified on the formation on engineering drawing) the rubber or copper strip Test Method: ASTM D 130 (Automotive Gasoline Meth
19、od), except 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 ml away from the copper strip. 4. FINISHED PART 4.1 OZONE RESISTANCE (FLTM BP 101-01) 4.1.1 Assembled Conditions, max Rating 0 Brass mandrel inserted 20 mm into end of hose
20、 (see 4.6 for mandrel diameter). Inspect end of hose for cracking. 4.2 BORE CHANGE -2 to +12% To be carried out on 100 mm length of hose, the measurements being taken at the center of the sample using an internal plug gage. Hose to be filled with ASTM Fuel C +15% methanol and allowed to stand at 70
21、C for 70 h. (The sample hose should be emptied out every 12 h and refilled with fresh test fluid.). After aging, the hose shall be immediately emptied and measurements taken after 5 minutes +/- 30 s. 4.3 BURST PRESSURE, min 1.2 MN/m2(ASTM D 380) 4.4 COLD FLEXIBILITY No cracking or other defects A 0.
22、5 m length of the hose filled with ASTM Fuel B, and allowed to stand for 24 h at 20 +/- 3 C, shall not crack or show other defects after being conditioned at -40 C for 70 h and bent 180 over a temperature conditioned mandrel 10 times the nominal diameter of the hose. This flexing shall be accomplish
23、ed within 4 s. 4.5 FLAMMABILITY (ISO 3795) Burn Rate, max 0 mm/minute Self-extinguishing Use 355 mm length of hose. ENGINEERING MATERIAL SPECIFICATIONWSD-M96D32-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 7 4.6 TUBE RETENTION The assembly shall comprise
24、a 90 mm length of brass tubing (to Ford specification ES2-M2A64/65-A or approved Engineering equivalent, surface finish approximately 0.4 microns and O/D as indicated below, at each end of which, to an insertion depth of 20 mm is fitted a 75 mm length of fuel hose, previously cleaned internally with
25、 iso-octane and allowed to dry. Pull-off loads shall be measured by gripping the two free hose ends in the jaws of a tensile testing machine and recording the max load when pulled at 25 mm/minute. Assemblies for fuel aging should be filled with test fuel, clipped tightly at each end and then placed
26、in the oven. Sample hose should be emptied every 24 h and refilled with fresh test fluid. After aging the hose shall be immediately emptied and tested after 5 minutes +/- 30 seconds. 4.6.1 Unaged, min 130 N 4.6.2 Heat Aged, min 110 N (ASTM D 573, 70 h at 100 C) 4.6.3 ASTM Fuel C +15% Methanol Aged,
27、min 110 N (70 h at 70 C) Dimensions for brass tubing as follows For hose intended for use over: 6 mm nominal O/D fuel lines, use 5.87 - 5.90 mm O/D tubing. 8 mm nominal O/D fuel lines, use 7.87 - 7.90 mm O/D tubing. 9 mm nominal O/D fuel lines, use 8.87 - 8.90 mm O/D tubing. 4.7 INSTALLATION EFFORT,
28、 max 130 N Cut hose to 40 +/- 2.5 mm length and install hose on test fixture (Figure 1) with one end inserted over relevant mandrel (as indicated in note below) to an engagement of 20 mm. Installation rate shall be 20 - 30 mm/minute. For hose to be attached to: 6 mm nominal O/D fuel lines, use 5.87
29、- 5.90 mm O/D mandrel. 8 mm nominal O/D fuel lines, use SAE J962 Style A mandrel. Diameter A As SAE +/- 0.05 mm Diameter X 6.9 +/- 0.08 mm Diameter Y 14.5 +/- 0.08 mm 9 mm nominal O/D fuel lines, use 8.87 mm O/D mandrel. Mandrel material: Brass to Ford Specification ES2-M2A64/65-A or Engineering app
30、roved equivalent. 4.8 RESISTANCE TO KINKING Assemble required length of hose on test fixture (Figure 2) securing each end with metal clamps. When installing hose, it shall be bent in the same plane and direction as its free state curvature. Place fixture within an oven at 120 +/- 3 C for 1 h, remove
31、 and within 5 minutes pass a steel ball of specified diameter through the hose installed on fixture. Ball must pass freely. ENGINEERING MATERIAL SPECIFICATIONWSD-M96D32-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 6 of 7 Test sample length shall be 40 x nomina
32、l I.D. of hose in mm. 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 Figure 2). This dimension is measured while sample is on the test fixture. 4.9 HIGH TEMPERATURE RE
33、SISTANCE No cracksA piece of hose bent into a free loop (approximately 0.25 m in diameter) until ends meet shall be aged in an oven at 150 +/- 3 C for 70 h. After the aging period the cover shall show no signs of cracking when examined under 7X magnification. The hose shall not be flexed during exam
34、ination. 6. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 6.1 IMMERSION IN OXIDIZED FUEL (SOUR FUEL) (ISO 1817/ASTM D 471, 336 h at 60 +/- 2 C, PN 90, fuel according to FLTM AZ 105-01) 6.1.1 Hardness Ch
35、ange Typically - 30 6.1.2 Tensile Strength Change Typically - 70% 6.1.3 Elongation Change Typically - 50% 6.2 HARDNESS, DUROMETER A 60 - 75 (ISO 868/ASTM D 2240, instantaneous) ENGINEERING MATERIAL SPECIFICATIONWSD-M96D32-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 7 of 7
