1、FORD LABORATORY TEST METHOD BP 014-01 Date 2001 0822 1992 07 30 PERMEABILITY TEST FOR FUEL HOSE AND TUBING Action Revisions Revised Editorial - no technical change A. Cockman Application This method defines the process for determining the permeability of fuel hose and tubing. Apparatus Required Plug
2、s Non-permeating lightweight plugs (aluminum). For 8 mm hose: 8 mm diameter x 13 mm long. For 50 mm hose: 50 mm diameter x 13 mm long. Hose Clamps Screw type hose clamps (stainless steel). (Utility Part No. 383526-S.) Balance Balance having a precision of +/- 0.005 g Source: Curtin Matheson Scientif
3、ic Catalog No. 359-307 or equivalent. Materials Required Fuel Indolene H.O. III Clear Fuel per ESE-M4C50-D. (Aromatic Content = 27.0 +/- 2.5 Vol. %). Caution: Health and Safety precautions. Very low flash point - refer to Fire Control Bulletin No. 18. Refer to Industrial Hygiene for Specimens (a) La
4、rge hose 50 mm diameter - one straight 150 mm section is required. (b) Small tube 8 mm diameter - one 275 mm section is required. Note: of tube with both ends plugged shall be 250 mm. Total effective length of hose with both ends plugged shall be 125 mm. Total effective length Copynght02001, Ford Gl
5、obal Technologies, Inc FORD LABORATORY TEST METHOD BP 014-01 Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 OC and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the sam
6、e conditions unless otherwise specified. Procedure 1. Prepare four test specimens in the following manner: (a) For the large 50 mm diameter hose - plug one end of the specimen with a lightweight plug. Fill three of the specimens with 225 mL (90 % of volume) of fuel. The fourth specimen is to be left
7、 empty. Plug the other end with a lightweight plug. (b) For the small 8 mm diameter tube - same as large hose except fill with 10 mL of fuel (90 % I.D. volume). 2. Weigh each specimen to within 0.01 g. 3. Place samples horizontally in a well ventilated area and maintain at a temperature of 21 +/- 3
8、OC. 4. Repeat weighing procedure at 24 +/- 1 h intervals for 14 days excluding weekends. The weight loss over a weekend may be averaged for the number of days for which the loss occurred. Calculations 1. Calculate the average surface permeation per day (fuel permeability resistance rate) in g/m2 /24
9、 h were: g1 = Average weight loss per specimen per day. g2 = Average weight loss in the empty hose per day. 9 = g1 - g2 = Average weight loss due to surface fuel permeation per specimen per day. m2 = Inside surface area of the tube/hose using the following formula: S=2mL r = nominal radius (mm) L =
10、nominal length (mm) Page 2 of 3 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BP 014-01 Nominal surface area for: 8 mm tube = 6.3 x m2 Nominal surface area for: 50 mm hose = 2.0 x 10. m2 Note: All dimensions to be measured before the test. 2. The fuel permeability resistan
11、ce rate is determined by averaging the average surface permeation per day (g/m2 /24 h) over a period of 14 days. All negative weight losses (gains) are to be assigned a value of zero. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. Page 3 of 3 Copynght02001, Ford Global Technologies, Inc
