FED-STD-228A
Method 7021.3
18 APRIL 2014
FLUID IMMERSION
1. SCOPE
1.1 This method is intended for use in determining the ability of cable to resist degradation when
exposed to specific fluids they may come in contact with during their service life.
2. SPECIMEN
2.1 An individual sample for each applicable fluid 18 inch minimum in length, shall be stripped to the
bare conductor on either end for one inch.
3. APPARATUS
3.1 The apparatus shall include the following:
a. A vessel to contain the various fluids in sufficient quantity to completely immerse 2/3 of the
wire or cable specimen.
b. An air circulating oven capable of maintaining temperature within ± 3°C of required setting.
The maximum test temperature is 175°C.
c. Table stove of hot plates.
d. An immersion thermometer that reads a range 0 to 150°C.
4. TEST FLUIDS
4.1 Unless otherwise specified in the detail specification or the contract order, the fluids shall be as
specified in table I.
5. PROCEDURE
5.1 Before proceeding with the fluid immersion, the sample shall be weighed. The applicable test
fluid shall be stabilized at the temperature specified in table I. A separate specimen shall be
immersed in each fluid to a minimum of 2/3 of the specimen's length. Immersion and cycling shall be
as specified in table I. Following the last immersion, the specimen shall be dried.
RESULTS
6.1 Any change of weight or delamination, softening, swelling (finished diameter of material),
reduction of electrical properties (e.g., dielectric withstanding voltage, scrape abrasion), or
discoloration of material finishes and markings shall be recorded.
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