1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 07 30 N-STATUS No Replacement Named Y. Bankowski, NA 2005 01 19 Revised Inserted 3.0; Deleted 3.1.6, 3.4 & 4 1969 05 15 Released AY2-126 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 3 TUBING, POL
2、YVINYL CHLORIDE - VACUUM LINE ESA-M4D292-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a nonreinforced extruded polyvinyl chloride tubing. 2. APPLICATION This specification was released originally for material used as a tubing for vacuum line in body interior
3、. 3. REQUIREMENTS Except where noted, the following tests are to be conducted on full sections of tubing. 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). 3.1 ORIGINA
4、L PROPERTIES, Unaged 3.1.1 Hardness - Durometer “A“ 65 - 75 (ASTM D 2240) Hardness Micro 65 - 75 IRHD (ASTM D 1415) 3.1.2 Tensile Strength, min 1,500 psi (10.3 MPa) (ASTM D 412, pulled at 20 +/- 1 in (500 +/- 25 mm)/min) 3.1.3 Elongation, min 200% (ASTM D 412) 3.1.4 Burst Pressure, min 150 psi (1.0
5、MPa) (ASTM D 380) 3.1.5 Tension Test, min 60 lb (267 kPa) Test Method: The ends of a 10 in (250 mm) length of 3/32 in I.D. tubing shall be fastened in the jaws of a tensile testing machine. The jaw separation rate shall be 20.0 +/- 1 in (500 +/- 25 mm)/min, until rupture of the tubing occurs. 3.1.7
6、Vacuum Collapse, max 30% Test Method: The collapse of the outside diameter of the tubing under internal vacuum of 24 in Hg (81 kPa) for 5 min at 20 +/- 3 C shall not exceed 30%. The test shall be made with the tubing curved to a radius equal to 5 times the maximum outside diameter of sample. ENGINEE
7、RING MATERIAL SPECIFICATIONESA-M4D292-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.1.8 Tear Resistance Must not tear Test Method: The tubing shall be expanded to a minimum internal diameter 2-1/2 times the normal inside diameter, by forcing the tubing
8、 over a 30, tapered, clean lubricated (silicone parting agent) metal cone that has a maximum finish of 20 in (0.5 m) rms. 3.2 ENVIRONMENTAL RESISTANCE 3.2.1 Cold Resistance Shall not fracture, show any cracks, checks or breaks Test Method: The tubing shall be subjected to a temperature of -40 C for
9、a period of 5 h, after which the tubing shall be flexed in the cold chamber through 180 from the centerline in each direction to a diameter 10 times the maximum outside diameter of the hose at each extreme of cycle for 5 cycles. The rate of cycling shall be approximately 1 cycle in 4 s. 3.2.2 Heat A
10、ging (ASTM D 573, 70 h at 100 +/- 3 C) After dry air aging the tubing must meet the following: Vacuum collapse must meet requirements of para. 3.1.7. Cold resistance must meet requirements of para. 3.2.1. Hardness - Durometer “A“ Change, max +15 (ASTM D 2240) Tensile Strength Change, max -15% (ASTM
11、D 412) Elongation Change, max -15% (ASTM D 412) Tear Resistance Must not tear (Test per para. 3.1.8 to 2X nominal I.D.) Weight Loss, max -5% 3.3 PRODUCTION QUALITY Samples selected at random each 8 h shift shall be tested in quantities shown for each of the following requirements: 3.3.1 Para. 3.1.1
12、Test 1 sample for hardness - durometer “A“ Para. 3.1.2 Test 1 sample for tensile strength Para. 3.1.3 Test 1 sample for elongation Para. 3.1.5 Test 1 sample for tension test 3/32 in I.D. Para. 3.1.7 Test 1 sample for vacuum collapse Para. 3.1.8 Test 1 sample for tear resistance ENGINEERING MATERIAL
13、SPECIFICATIONESA-M4D292-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.3.2 Retests and Rejection Any hose which fails in one or more of the requirements in para. 3.3.1 shall be resampled and retested. For this, 2 additional samples shall be selected fro
14、m the same shift for the test or tests which the original sample failed to pass. Retest values exceeding 90% of original requirements have been met for the preceeding 5 testing days. Failure of either of the retested samples shall be cause for final rejection of hose produced during that shift. 3.3.
15、3 Test Records The supplier shall maintain records of Production Quality Test results for review by the cognizant Ford Quality Control activity. Once per month, the supplier is required to forward to the affected product engineering office a summary which indicates the frequency of failure (number of failures per number of samples tested in a given month of production) for each of the requirements of para. 3.3.1. The passage or failure of any retests shall be noted in the summary.
