1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 07 30 N-STATUS No Replacement Named Y. Bankowski, NA 2005 01 25 Revised Inserted 3.0; Deleted 3.1, 3.4 & 4 1982 01 18 Released H8L59 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 2 TUBING, POLYVIN
2、YL CHLORIDE - VACUUM LINE ESH-M4D292-A2 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 mini tubing for vacuum line in body interi
3、or. 3. REQUIREMENTS 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). 3.2 ORIGINAL PROPERTIES 3.2.1 Hardness - Durometer “A“ 80 +/- 5 (ASTM D 2240) Hardness - Micro 80
4、 +/- 5 IRHD (ASTM D 1415) 3.2.2 Tensile Strength, min 1,500 psi (10.3 MPa) (ASTM D 412, pulled at 20 +/- 1 in (500 +/- 25 mm)/min) 3.2.3 Elongation, min 200% (ASTM D 412) 3.2.4 Burst Pressure, min 150 psi (1.0 MPa) (ASTM D 380) 3.2.5 Tension Test, min 22 lb (98 kPa) Test Method: The ends of a 10 in
5、(250 mm) length of 0.055 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. 3.2.6 Vacuum Collapse, max 30% Test Method: The collapse of the outside diameter of the tubing u
6、nder 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 radium equal to 5 times the maximum outside diameter of sample. ENGINEERING MATERIAL SPECIFICATIONESH-M4D292-A2 Printed copies are uncontrolled Copyright 2009, F
7、ord Global Technologies, LLC Page 2 of 2 3.2.7 Tear Resistance Must not tear Test Method: The tubing shall be expanded to a minimum internal diameter of 2-1/2 times the normal inside diameter, by forcing the tubing over a 30, tapered, clean lubricated (silicone parting agent) metal cone that has a m
8、aximum finish of 20 in (0.5 m) rms. 3.3 ENVIRONMENTAL RESISTANCE 3.3.1 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 a period of 5 h, after which the tubing shall be flexed in the cold chamber through 18
9、0 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. 3.3.2 Heat Aging (ASTM D 573, 70 h at 100 +/- 3 C) After dry air aging the tubing must meet the fo
10、llowing: Vacuum collapse must meet requirements of para 3.2.6. Cold resistance must meet requirements of para 3.3.1. Hardness - Durometer “A“ Change, max +15 (ASTM D 2240) Tensile Strength Change, max -15% (ASTM D 412) Elongation Change, max -15% (ASTM D 412) Tear Resistance Must not tear (Test per para 3.2.7 to 2X nominal I.D.) Weight Loss, max -5%
