1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 03 Revised Inserted 3.0; Deleted 3.14 & 4 1979 01 10 Metricated, Renumbered and Retyped CAH2823385 1975 08 14 Released CAD2-760292 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 5 HOSE, REINFORC
2、ED RUBBER - FUEL LINE ESA-M2D50-A 1. SCOPE The material defined by this specification is a reinforced rubber hose. 2. APPLICATION This specification was released originally for material used for fuel line and fuel tank filler lines. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS
3、Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 CONSTRUCTION The hose shall have a smooth bore tube (gasoline resistant) of suitable synthetic rubber, reinforced with one ply of braided, knit, spiral, or woven fa
4、bric, and covered with a suitable oil and ozone resistant synthetic rubber coating. 3.2 BURST PRESSURE, min 175 psi (1.2 MPa) (ASTM D 380) 3.3 VACUUM COLLAPSE, max 20% Test Method: Subject the hose to a vacuum of 20 in Hg (68 kPa) while bent over a mandrel having a diameter 10 times the nominal O.D.
5、 of the hose. After and during the 24 h at 102 +/- 3 C, the outside diameter shall not be less than 80% of the original. 3.4 COLD FLEXIBILITY, Tube and Cover No cracks or breaks Test Method: An 18 in (450 mm) length of the hose filled with ASTM Fuel “B“ shall not crack or show other defects after be
6、ing conditioned at -40 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. 3.5 OZONE RATING, Cover 0 (FLTM BP 101-01) 3.6 HIGH TEMPERATURE RESISTANCE No cracks Test Method: A piece of hose bent into a fr
7、ee loop (approximately 10 in (250 mm) diameter) until ends meet shall be aged in an oven at 149 +/- 3 C for 70 h. At the end of the aging period the cover shall show no signs of cracking when examined under a 7 power glass. ENGINEERING MATERIAL SPECIFICATIONESA-M2D50-APrinted copies are uncontrolled
8、 Copyright 2004, Ford Global Technologies, LLC Page 2 of 5 3.7 OVALITY, min 75% Ovality will be expressed as a ratio of the inside minor to major diameter times 100. 3.8 PHYSICAL CHARACTERISTICS (ASTM D 380) Tube Cover 3.8.1 Original Properties Tensile Strength, psi (MPa), min 1250 (8.6) 1250 (8.6)
9、Ultimate Elongation, % min 250 250 Modulus at 100% Elongation, 275 (1.9) 180 (1.2) psi (MPa), min 3.8.2 Aged Properties (70 h at 102 +/- 3 C) Tensile Strength, psi (MPa), min 685 (4.7) 685 (4.7) Ultimate Elongation, % min 135 135 3.8.3 Immersion in ASTM Reference Fuel “B“ (48 h at 23 +/- 2 C) Tensil
10、e Strength, psi (MPa), min 875 (6.0) 875 (6.0) Ultimate Elongation, % min 175 175 Volume Increase, % max 25 - 3.8.4 Adhesion, lb/in (kN/m) of width, min 6 (1.0) (tube to cover) 3.9 FLAMMABILITY, cover Self-extinguishing Test Method: Cut 1/4 in (6.4 mm) wide strips longitudinally from the cover, whic
11、h have been removed from the hose. A Bunsen burner shall be used to start burning of the strips until approximately 1/2 in (13 mm) of 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-extinguishin
12、g within 1 min. The average time of at least 6 determinations shall be used. The test shall be conducted in a draft free atmosphere. 3.10 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 in t
13、he same plane and direction as its free state curvature. Place fixture in an oven at 121 +/- 3 C for 1 h. Remove fixture from oven and within 5 min pass a steel ball of specified diameter through hose installed on fixture. Ball must pass freely. ENGINEERING MATERIAL SPECIFICATIONESA-M2D50-APrinted c
14、opies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 5 Nominal I.D. Limits Test Sample Length Ball Diameter (Reference) in (mm) in (mm), min in (mm) 3/16 0.141 (3.58) 9 (225) 0.066 +/- 0.002 0.171 (4.34) (1.68 +/- 0.05) 1/4 0.192 (4.88) 10 (250) 0.094 +/- 0.002 0.266 (6.76)
15、 (2.39 +/- 0.05) 5/16 0.272 (6.91) 12 (300) 0.126 +/- 0.002 0.328 (8.33) (3.20 +/- 0.05) 3/8 0.335 (8.51) 16 (400) 0.156 +/- 0.002 6.390 (9.91) (3.96 +/- 0.05) Sample Selection: Production hose selected for the kink test should represent, as nearly as possible, minimum wall thickness. When recording
16、 results include wall thickness, ovality, and dimension “A“ (see above). This dimension is measured while sample is on the test fixture. 3.11 INSTALLATION EFFORT, max 20 lb (89 N) Test must be completed satisfactorily with initial production parts for ISIR approval. Parts must be retested whenever a
17、ny change is made which may affect part installation effort. Test Method: Cut hose to 1.60 +/- 0.10 in (40.6 +/- 2.5 mm) length and immerse one end into 20W oil (ESE-M2C101-C) to approximately 1/4 in (6.4 mm) depth. Immediately install hose on test fixture with lubricated end inserted over SAE J962a
18、 Style A (tolerance on outside diameter “A“ +/- 0.002) formed tube to an engagement of 3/4 in (19 mm). Test load application shall not exceed 1 minute. ENGINEERING MATERIAL SPECIFICATIONESA-M2D50-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 5 Diameter “B“
19、Diameter “C“ Nominal Hose in +/- 0.003 in +/- 0.003 (Reference) (mm +/- 0.08) (mm +/- 0.08) 3/16 0.141 (3.58) 0.376 (9.55) 1/4 0.210 (5.33) 0.465 (11.81) 5/16 0.272 (6.91) 0.578 (14.68) 3/8 0.335 (8.51) 0.617 (15.67) 3.12 HOSE IDENTIFICATION A colored tracer cord in the reinforcement of the hose may
20、 be used for source identification. The color shall be determined between purchasing and the supplier. The word “gas“ and the coding described below shall appear on the outer cover of the hose in contrasting color and repeated at intervals of 2.25 in (57 mm) or less. Mandrel cured hose may be coded
21、once per part. The following format is recommended: Example Date: January 8, 1972 ENGINEERING MATERIAL SPECIFICATIONESA-M2D50-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 5 of 5 3.13 HOSE MODIFICATION For hose whose inside diameter is greater than 0.450 in (11.
22、43 mm) the following exceptions apply: . Para. 3.2, Burst Pressure, min 50 psi (345 kPa) . Para. 3.3 Delete . Para. 3.4, in place of an 18 in (450 mm) hose use test sample cut from part. Sample width to be 0.50 in (12.7 mm). Sample length to be equal to developed length of part. Mandrel diameter to
23、be 5.00 +/- 1/4 in (127 +/- 6.4 mm). Test sample to be soaked in specified fuel at specified temperature. . Para. 3.6, in place of 18 in (450 mm) hose use test sample cut from part. Sample width to be 0.50 in (12.7 mm). Sample length to be equal to developed length of part. Bend sample to approximately 5 in (127 mm) radius during aging. . Para. 3.7 Delete . Para. 3.10 Delete . Para. 3.11 Delete
