1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 05 25 N-STATUS No replacement named C. Mracna, NA 2004 10 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.15 & 4 1991 12 13 Released NE01E10127076034 E. J. Duda Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, L
2、LC Page 1 of 6 TUBING, VACUUM, FLEX FUEL, OXIDIZED WSE-M2D468-A1 FUEL RESISTANT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an elastomer vacuum tubing with excellent resistance to fuel permeation, oxidized fuel (sour gasoline, and flex fuel). The tubing will
3、withstand ambient air temperatures from -30 to +135 C. 2. APPLICATION This specification was released originally for a material used in the fuel recirculation and emission systems where resistance to flex fuel, oil, sour fuel and temperature from -30 to +135 C is required. 3. REQUIREMENTS 3.0 STANDA
4、RD 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 3.4.1 The tubing shall consist of a fluoroelastomer veneer, having a high temperature, ozone resistant sy
5、nthetic rubber cover. 3.5 PHYSICAL CHARACTERISTICS (ASTM D 380/ASTM D 3183) All tests to be performed on the vacuum tubing. 3.5.1 Original Properties Cover Veneer Tensile Strength, MPa, min 8.5 5.5 Elongation, Ultimate, %, min 200 125 Hardness, Durometer A 60 - 75 60 - 75 3.5.2 Heat Aging (ASTM D 57
6、3, 168 h at 135 C) Tensile Strength, Change, -10 to +25 NR %, max Elongation, Change, %, max -55 to 0 NR Hardness Change 0 to +25 - (Must not exceed 90 Durometer A) ENGINEERING MATERIAL SPECIFICATIONWSE-M2D468-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of
7、6 Cover Veneer 3.5.3 Heat Aging (ASTM D 573, 1000 h at 125 C) Tensile Strength, Change, -20 to +20 NR %, max Elongation, Change, %, max -60 to 0 NR Hardness Change 0 to +25 NR (Must not exceed 90 Durometer A) 3.5.4 Immersion in Reference Fuel C (ASTM D 471, 70 h at 23 +/- 2 C) Volume Change, %, max
8、NR +25 Tensile Strength Change, NR -42 to 0 %, max Elongation Change, %, max NR -50 to 0 Hardness Change NR -20 to 0 3.5.5 Immersion in Oil #3 (ASTM D 471, 70 h at 150 +/- 3 C) Volume Change, %, max +40 NR 3.5.6 Immersion in Reference Fuel C (ASTM D 471, 50% Anhydrous Methanol, 70 h at 60 C) Volume
9、Change, %, max NR +30 Tensile Strength Change, NR -52 %, max Elongation Change, %, max NR -22 Hardness Change NR -25 3.5.7 Immersion in Oxidized Fuel (FLTM AZ 105-01, P.N-60, 21 days at room temperature) Volume Change, %, max NR +22 Tensile Strength Change, NR -25 %, max Elongation Change, %, max NR
10、 +25 100% Modulus Change, %, max NR -32 3.5.8 Low Temperature Retraction C (ASTM D 1329 at 50% elongation T-10, min -37 -22 3.5.9 Adhesion, min (ASTM D 413, strip method) Veneer to tube 1.4 kN/m ENGINEERING MATERIAL SPECIFICATIONWSE-M2D468-A1Printed copies are uncontrolled Copyright 2010, Ford Globa
11、l Technologies, LLC Page 3 of 6 3.6 OZONE RATING, Cover 0 (FLTM BP 101-01, after aging of the cover for 70 h at 125 +/- 2 C) 3.7 COLD FLEXIBILITY, Veneer, Tube, & Cover No cracks or breaks Test Method: A 450 mm length of the hose filled with Fuel “C“ shall not crack or show other defects after being
12、 conditioned at -30 C for 70 h and bent 180 over a temperature conditioned mandrel 10 times the nominal O.D. of the hose. This flexing shall be accomplished within 4 s. 3.8 OVALITY, min 92% Ovality will be expressed as a ratio of the inside minor to major diameter times 100. 3.9 BURST PRESSURE, min
13、0.7 MPa (ASTM D 380) 3.10 VACUUM COLLAPSE, max 10% Test Method: The hose shall be subjected to a vacuum of 500 mm Hg (68 kPa) while bent over a mandrel having a diameter of 10 times the nominal O.D. of the hose. After and during the 24 h at 102 +/- 3 C, the outside diameter shall not be less than 90
14、% of the original. 3.11 FUEL PERMEABILITY RESISTANCE, max TBD 3.12 FLAMMABILITY, Cover Self-extinguishing Test Method: Cut 6.4 mm wide strips longitudinally from the cover, which have been removed from the hose. A Bunsen burner shall be used to start burning of the strips until approximately 13 mm o
15、f the strip is burning vigorously. Remove the burning strip from the flame and hold it horizontally with the outside facing upward. The flame shall be self-extinguishing within one minute. The average time of at least 6 determinations shall be used. The test shall be conducted in a draft free atmosp
16、here. 3.13 RESISTANCE TO KINKING Test Method: Insert required 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 121 +/- 3 C for 1 h. Remove fix
17、ture 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. Limits Test Sample Length Ball Diameter (Reference) mm mm, min mm 3/16 3.58 225 1.68 +/- 0.05 4.34 1/4 4.88 250 2.39 +/- 0.05 6.76 5/16 6.91 300 3.20 +/-
18、 0.05 8.33 3/8 8.51 400 3.96 +/- 0.05 9.91 ENGINEERING MATERIAL SPECIFICATIONWSE-M2D468-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 6 Sample Selection: Production hose selected for the kink test should represent, as nearly as possible, minimum wall thick
19、ness. When recording results include wall thickness, ovality, and dimension “A“ (see above). This dimension is measured while sample is on the test fixture. ENGINEERING MATERIAL SPECIFICATIONWSE-M2D468-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 6 ATTACH
20、MENT 1 RATE OF FUEL PERMEATION RESERVOIR SYSTEM EQUIPMENT REQUIRED 1) Reservoir Unit: An oblong screw top can that is modified by cold soldering a standard hose nipple into its base at the corner opposite its opening. 2) Screw Cap: A metal foil or fluoroelastomer lined cap to seal the reservoir unit
21、. 3) Scale or Balance: A weighing unit with a 1200 g min capacity and readable to 0.01 g for hoses through 19 mm I.D., and 3 kg capacity and readable to 0.1 g for hoses greater than 19 mm I.D. 4) Impermeable Plug or End Fitting: An impermeable plug or end fitting of sufficient size to seal one end o
22、f the hose. 5) Hose Clamps: Standard hose of correct size for hose being tested. PROCEDURE 1) Cut hose to proper length (see table under Step 11). 2) Plug one end of hose and measure depth of plug. 3) Fill hose with Fuel “C“ using a burette or graduate to measure volume of hose, and record volume. 4
23、) Attach unplugged end of the hose to the hose nipple on the reservoir and secure with a hose clamp. 5) Fill the reservoir with Fuel “C“ (see attached table for amount), and seal reservoir with screw cap. 6) Weigh reservoir and hose assembly and record the weight. 7) Orient assembly vertically and g
24、ently tap hose to insure complete filling of hose. 8) Place assembly horizontally in its storage position with the reservoir resting on its narrow side near the nipple with the hose in horizontal position. Storage location should be temperature controlled to 23 +/- 2 C. 9) Weigh and record the weigh
25、t of assembly each 24 h +/- 1/2 h for 14 days. 10) After each weighing invert assembly to drain hose, gently mix fuel and agitate hose as in Step 7 and replace in storage position. ENGINEERING MATERIAL SPECIFICATIONWSE-M2D468-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies
26、, LLC Page 6 of 6 11) Determine permeation rate for each day. G is the 24 h weight loss in grams. V is the volume of the hose measured in Step 3 in cm3. L is the exposed length of hose in cm. P is the permeation rate. G x 2821 P - g/m2/24 h Sqr (L) Hose Diameter 9.5 I.D. 9.5 I.D. 25 I.D. mm mm mm Reservoir 473 mL 946 mL 3785 mL Hose Length 300 mm 300 mm 200 mm Fuel Volume 300 mL 800 mL 2500 mL
