1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 10 31 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.5 & 4 1999 09 09 Revised Revised 2 & 3.4.11 K. Gribble 1996 09 06 Activated J. Spencer Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 3 TUBE, P
2、OLYAMIDE 12 (PA12), PVDF BARRIER, WSS-M98D33-A3 POLYAMIDE 12 TUBE, LOW PRESSURE, FUEL/ETHYL ALCOHOL RESISTANT, NON-CONDUCTIVE, LOW PERMEATING 1. SCOPE This specification defines a Multilayered Tubing with a non-conductive inner layer. The construction has low permeation rates and good resistance to
3、fuel/ethyl alcohol blends. 2. APPLICATION This specification was released originally for flexible fuel vapor lines requiring low permeation. The maximum working pressure should not exceed 104 kPa. Long term continuous operating temperature should not exceed 90 C and maximum intermittent temperature
4、should not exceed 115 C. These lines will meet the requirements of the US market for both reformulated fuels and flexible (methyl and ethyl alcohols) fuels. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard
5、Requirements For Production Materials (WSS-M99P1111-A). 3.4 PERFORMANCE REQUIREMENTS In addition to those requirements listed below in para 3.4.1, 3.4.2 and 3.4.6, the tube must meet the requirements for fuel vapor tubing listed in para 7 of SAE J2260. The fuels listed in para 3.4.9, 3.4.10 and 3.4.
6、11 are to replace the fuels listed in SAE J2260 para 7.7, 7.8 and 7.10 respectively. 3.4.1 Room Temperature Burst, min 832 kPa (SAE J2260, para 7.1) 3.4.2 High Temperature Burst, min 312 kPa (SAE J2260, para 7.2, 90 C) 3.4.3 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 115 +/- 2
7、 C) After heat aging determine 624 kPa burst pressure, min Check for delamination No loss of (SAE J2260 para 7.11.2) adhesion ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A3 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 3 3.4.4 Heat Aged (ISO 188/ASTM D 573
8、, 150 +/- 50 air changes/h, 1008 h at 90 +/- 2 C) After heat aging determine burst 624 kPa strength, burst pressure, min (SAE J2260, para 7.1) Check for delamination No loss of (SAE J2260 para 7.11.2) adhesion 3.4.5 Resistance to Zinc Chloride, 624 kPa burst pressure, min (SAE J2260, para 7.3) 3.4.6
9、 Burst Test Kinked Tubing, 624 kPa burst pressure, min (SAE J2260, para 7.4) 3.4.7 Resistance to Kinking Ball must pass (SAE J2260, para 7.5) freely 3.4.8 Cold Temperature Impact, 624 kPa burst pressure, min (SAE J2260, para 7.6) 3.4.9 Fuel Resistance 3.4.9.1 90% Fuel C, 10% Ethanol (SAE J2260, para
10、 7.7, 1008 h, 40 +/- 2 C) Perform cold impact, 624 kPa (SAE J2260, para 7.6) then determine burst strength (SAE J2260, para 7.1) burst pressure, min Check for delamination No loss of (SAE J2260 para 7.11.2) adhesion 3.4.9.2 85% Fuel C, 15% methyl tert-butyl ether (SAE J2260, para 7.7, 1008 h, 40 +/-
11、 2 C) Perform cold impact, 624 kPa (SAE J2260, para 7.6) then determine burst strength (SAE J2260, para 7.1) burst pressure, min Check for delamination No loss of (SAE J2260 para 7.11.2) adhesion ENGINEERING MATERIAL SPECIFICATION WSS-M98D33-A3 Printed copies are uncontrolled Copyright 2006, Ford Gl
12、obal Technologies, LLC Page 3 of 3 3.4.10 Oxidized Fuel Resistance (Sour Gas) (SAE J2260, para 7.8 336 h, 60 +/- 2 C, except prepare fuel per FLTM AZ 105-01 PN 180) Perform cold impact, 624 kPa (SAE J2260, para 7.6) then determine burst strength (SAE J2260, para 7.1) burst pressure, min Check for de
13、lamination No loss of (SAE J2260 para 7.11.2) adhesion 3.4.11 Permeation Resistance 70 gm/m2 / 24 h (SAE J2260, para 7.10 using 75% Fuel C, 25% Methanol, 60 C, 200 kPa) 3.4.12 Fluid Resistance Cover Stock (Expose outside of tubing only) 3.4.12.1 Immersion in 85% Fuel C, 15% Methanol (ISO 1817/ASTM D
14、471, 24 h at 40 +/- 2 C followed by 24 h at 90 C dry) Perform cold impact, 624 kPa (SAE J2260, para 7.6) then determine burst strength (SAE J2260, para 7.1) burst pressure, min 3.4.12.2 Immersion in IRM 903 oil (ISO 1817/ASTM D471, 24 h at 40 +/- 2 C followed by 24 h at 90 C dry) Perform cold impact, 624 kPa (SAE J2260, para 7.6) then determine burst strength (SAE J2260, para 7.1) burst pressure, min 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE PA12, PVDF
