1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 26 N-STATUS No known use. No Replacement Named C. Mracna, NA 2004 08 26 Revised Para 3.0 inserted; para 3.1, 3.10 & 4 deleted 1984 12 12 Released CE3PRD863100E134 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies
2、, LLC Page 1 of 2 TUBING, RUBBER - LARGE DIAMETER ESE-M2D352-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a nonreinforced synthetic rubber tubing with good heat and ozone resistance. 2. APPLICATION This specification was released originally for large diamete
3、r tubing used in low pressure or vacuum applications where good heat and ozone resistance is required such as thermactor air intake lines. This tubing has poor fuel, oil and kink resistance. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must
4、 conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 ORIGINAL PROPERTIES Hardness Durometer A 70 + 5 (ASTM D 2240) Tensile Strength, min 10.3 MPa (ASTM D 412) Modulus at 100% Elongation, min 3.4 MPa Elongation, min 250% 3.3 PROPERTIES AFTER HEAT AGING (ASTM D
5、 865, 168 h at 135 + 1 C) Hardness, Durometer A Change 0 to +12 (Note: Hardness is not to exceed 85 durometer) Tensile Strength Change, max + 25% Elongation Change, max -60% 3.4 OZONE RATING Must meet (FLTM BP 101-01, except 50% elongation) ESB-M9P1-A 3.5 COMPRESSION SET, max 62% (ASTM D 395, Method
6、 B, 22 h at 135 C) ENGINEERING MATERIAL SPECIFICATIONESE-M2D352-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.6 VACUUM COLLAPSE, max 3/4 in or Less 1% Over 3/4 in up to 1 in 10% Over 1 in NR Plug all openings except one which is to be attached to a vacu
7、um system capable of maintaining 51 kPa (15 in Hg) for 5 min. The collapse of any unsupported outside diameter of the fitting under an internal vacuum is measured. 3.7 COLD FLEXIBILITY As Received No cracks or breaks After Heat Aging per para 3.3 No cracks or breaks Test Method: The tubing shall be
8、subjected to a temperature of -40 C for a period of 24 h. The tubing shall then be flexed 180 over a temperature conditioned mandrel having a diameter equal to eight times the outside diameter of the tubing under test. The test shall be conducted in the cold chamber as rapidly as possible and the op
9、erator shall wear temperature conditioned gloves. 3.8 BURST PRESSURE, min (ASTM D 380, all diameters) 3/4 in or Less 759 kPa Over 3/4 in up to 1 in 517 kPa Over 1 in NR 3.9 SOURCE IDENTIFICATION Each tubing shall have the suppliers identification marks permanently affixed. The markings shall be identical to those shown in the Rubber Manufacturers Association Source Identification Book.
