SPECIFICATION RT-1148 ISSUE 8 Page 7
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TABLE 3
Requirements
PROPERTY UNIT REQUIREMENT TEST METHOD
PHYSICAL
Dimensions
inches (mm)
In accordance with Table 1
Section 4.3.1
Longitudinal Change percent -10 to +2 ASTM D 2671
Tensile Strength psi (MPa) 2500 (17.2) minimum Section 4.3.2
Tensile Stress at 100% elongation psi (MPa) 1500 (10.3) maximum ASTM D 2671
Ultimate Elongation percent 350 minimum
Specific Gravity 1.5 maximum ASTM D 2671
Hardness Shore A 80 ± 10 ASTM D 2240
Low Temperature Flexibility
4 hours at -65 ± 5°C (-85 ± 9°F)
--- No cracking Section 4.3.3
Heat Shock
4 hours at 225 ± 5°C (437 ± 9°F)
--- No dripping, flowing or cracking Section 4.3.4
Heat Resistance
168 hours at 150 ± 3°C (302 ± 5°F)
Followed by test for:
--- --- Section 4.3.5
Tensile Strength
Ultimate Elongation
psi
percent
2000 (13.8) minimum
300 minimum
Section 4.3.2
Copper Stability
168 hours at 150 ± 2°C (302 ± 4°F)
Followed by test for:
No brittleness, glazing or
cracking of tubing; no pitting
or blackening of copper
Section 4.3.6
Ultimate Elongation percent 200 minimum Section 4.3.2
ELECTRICAL
Dielectric Strength
Volts/mil
(Volts/mm)
300 (11,800) minimum
Section 4.3.7
Volume Resistivity ohm-cm
10
10
minimum
ASTM D 257
CHEMICAL
Flammability
seconds
Self-extinguishing within
15 seconds; no dripping or
flowing; no burning or charring
of indicator
ASTM D 2671
Corrosive Effect
16 hours at 175 ± 3°C (347 ± 5°F)
Noncorrosive Section 4.3.8
ASTM D 2671
Fungus Resistance Rating of 1 or less ASTM G 21
Fluid Resistance
24 hours at 25 ± 3°C (77 ± 5°F) in:
Cleaning Compound (A-A-59133)
Gasoline Automotive
(ASTM D 4814)
JP-8 Fuel (MIL-DTL-83133)
--- --- Section 4.3.9
Water
Followed by tests for:
Tensile Strength psi (MPa) 1800 (11.0) minimum Section 4.3.2
Ultimate Elongation percent 300 minimum
Weight Increase percent 20 maximum Section 4.3.9
