1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 25 N-STATUS No Replacement Named C. Mracna, NA 2004 08 18 Revised Para 3.0 inserted; para 3.4, 3.6 & 4 deleted 1983 05 31 Released CE3N-RD863100-E79 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 o
2、f 3 TUBING, EPDM - SHORT FIBER REINFORCED ESE-M2D316-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a fiber reinforced, heat resistant EPDM tubing. 2. APPLICATION This specification was released originally for tubing used in low pressure, high heat application
3、s such as thermactor lines. This tubing has poor kink resistance so care must be used when routing the lines to avoid bending of the tubing. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For
4、 Production Materials (WSS-M99P1111-A). 3.1 COMPOSITION Shall consist of fibers distributed in a circumferential direction throughout a single wall extrusion of EPDM rubber tubing. The fibers are chemically bonded to the polymer. 3.2 SLAB STOCK With Against Grain Grain 3.2.1 Original Properties (AST
5、M D 412 & D 2240) Hardness, Durometer “A“ 75 - 85 Tensile Strength, psi (MPa), min 1,000 (6.9) 800 (5.5) 100% Modulus, psi (MPa), min - 550 (3.8) Elongation, % 20 - 50 110 - 180 Tear Die “C“, lb/in (kN/m), min 130 (23) 85 (15) 3.2.2 Heat Aged Properties With Against (ASTM D 865, 168 h at 135 C) Grai
6、n Grain Hardness, Durometer “A“ Change +10 (Not to exceed 92) Tensile Strength Change, % -15 max 0 to +25 Tear Die “C“, lb/in (kN/m), min 85 (15) 80 (14) Elongation Change, % 0 to +175 0 to -30 ENGINEERING MATERIAL SPECIFICATIONESE-M2D316-A Printed copies are uncontrolled Copyright 2009, Ford Global
7、 Technologies, LLC Page 2 of 3 3.2.3 Immersion in Coolant With Against (FLTM BP 8-5, 168 h at room Grain Grain temperature) Immerse samples in a mixture of equal parts of ESE-M97B44-A Long Life Coolant and distilled water. Volume Change, % max 0 to +5 0 to +5 Tensile Strength Change, % max -5 to +10
8、 -5 to +15 Elongation Change, % max 0 to +60 0 to +8 Hardness, Durometer Change +/- 5 +/- 5 3.3 PARTS 3.3.1 Burst Strength, min (FLTM BP 8-4, room temperature) 5/8 in I.D. and smaller 250 psi (1.7 MPa) 41/64 to 3/4 in. in I.D. 230 psi (1.6 MPa) Unless otherwise specified on engineering drawing. 3.3.
9、2 Ovality, min 80% Ovality will be expressed as a ratio of the inside minor to major diameter times 100. 3.3.3 Vacuum Collapse, max 8% Test Method: The tubing shall be subjected to a vacuum of 20 in Hg (68 kPa) while bent over a mandrel having a diameter 10 times the nominal O.D. of the tubing. Afte
10、r and during the 24 h at 102 +/- 3 C, the outside diameter shall not be less than 94% of the original. 3.3.4 Ozone Rating Must meet ESB-M9P1-A (FLTM BP 1-1, 96 h, 20% elongation) 3.3.5 Cold Flexibility No cracks, checks or breaks Test Method: Condition a 18 in (450 mm) tubing at -40 C for 5 h. After
11、 conditioning, the tubing shall be flexed in the cold chamber through 180, from the centerline in one and then opposite direction, to a diameter 10 times the maximum outside diameter of the tubing. Flexing shall be accomplished within 8 s. Examine tubing under 7X magnification. 3.3.6 Tensile Set, ma
12、x 20% (ASTM D 412, 50% elongation) ENGINEERING MATERIAL SPECIFICATIONESE-M2D316-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.3.7 Kink Resistance (For 1 in I.D. and smaller) Applies to formed and straight tubings continuing straight lengths equal to or
13、 greater than the test lengths shown below. The tubing sample shall be stabilized at room temperature (23 +/- 2 C) before start of test. The test fixture shall consist of 1 in (25 mm) flat plate with 2 holes for each size tubing. Diameters and center distances between holes are tabulated below. With
14、 tubing bent through 180 and inserted in the fixture, with each of the test length flush with the opposite side, the sample shall show no visible evidence of buckling and shall pass a steel ball freely through the sample tubing. Tubing Size Test Length Center Distance Hole Diameter Ball Diameter 1 i
15、n I.D. & 34 in (864 mm) 8 x I.D. O.D.+0.06 in 0.5 x I.D. smaller (1.5 mm) 3.3.8 Impulse Strength (For 1 in I.D. and smaller) Test Sample A minimum of 4 samples of each tubing design, selected at random from production, shall be tested to prove compliance with this requirement. All tubings 12 in (300
16、 mm) or less in total length shall be tested as received. Tubings longer than 12 in (300 mm) may be cut to 12 in (300 mm) for test purposes (test samples to include the most extreme bend if tubing is formed). Test Procedure The samples shall be subjected to a total of 250 internal pressure pulses at
17、 a rate of 6 to 8 pressure cycles/min with initial pressure between 0 and 40 psig (0 and 276 kPa) then increased over a period of 3 to 6 s to the peak pressure tabulated below for each tubing size. Coolant mixture as specified in para 3.4 and maintained at 99 +/- 5 C shall be circulated through the
18、tubing during test. Tubing Size Peak Pressure, psig (kPa) in 5/8 I.D. and smaller 150 +/- 5 (1034 +/- 34) 41/64 I.D. to 3/4 I.D. 110 +/- 5 (758 +/- 34) 49/64 I.D. to 1 I.D. 75 +/- 5 (518 +/- 34) Compliance Tubing shall not burst, leak or shown any visible defects. 3.5 SOURCE IDENTIFICATION Each part shall have the suppliers identification marks permanently affixed. The markings shall be identical to those shown in the Rubber Manufacturers Association Source Identification Book.
