SPECIFICATION RT-555 ISSUE 7 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 +0, -10 ASTM D 2671
Concentricity as Supplied Percent 60% minimum
Tensile Strength Psi (MPa) 4000 minimum (27.6) Section 4.3.2
Ultimate Elongation Percent 200 minimum ASTM D 2671
2% Secant Modulus (Expanded) Psi (MPa) 50,000 maximum (345) ASTM D 2671
Specific Gravity --- 2.0 maximum ASTM D 792
Low Temperature Flexibility
4 hours at -65 ± 3ºC (-85 ± 5ºF)
--- No cracking Section 4.3.3
Heat Shock
4 hours at 300 ± 5ºC (572 ± 9ºF)
--- No dripping, flowing or cracking Section 4.3.4
Heat Resistance
336 hours at 250 ± 3ºC (482 ± 5ºF)
--- --- Section 4.3.5
Followed by test for
Ultimate Elongation
Percent
150 minimum
Section 4.3.2
ASTM D 2671
Vacuum Outgassing
TML (Total Mass Loss)
VCM (Volatile Condensible Material)
Percent
Percent
1.0 maximum
0.1 maximum
NASA
Specification
SP-R-0022A
Copper Stability
16 hours at 200 ± 3ºC (392 ± 5ºF)
--- No brittleness, glazing or severe
discoloration of tubing. No
pitting or blackening of copper.
Section 4.3.6
Followed by test for
Ultimate Elongation
Percent
150 minimum
Section 4.3.2
ASTM D 2671
ELECTRICAL
Dielectric Strength
Volts/mil
200 minimum
ASTM D 2671
CHEMICAL
Copper Mirror Corrosion
16 hours at 200 ± 3ºC (392 ± 5ºF)
Percent
Copper removal 8% maximum
Section 4.3.7
ASTM D 2671
Procedure A
Flammability --- 1) 25% maximum flag burn
2) No burning of cotton
3) No flaming or glowing
longer than 60 seconds
ASTM D 2671
Procedure C
After fluid immersion
24 hours at 23 ± 3ºC (73 ± 5ºF)
ASTM D 4814 Gasoline,
Automotive Combat
--- 1) 25% maximum flag burn
2) No burning of cotton
3) No flaming or glowing
longer than 60 seconds
Section 4.3.9
ASTM D 2671,
Procedure C
24 hours at 50 ± 3ºC (122 ± 5ºF)
A-A-52557 Fuel Oil, Diesel
MIL-DTL-83133 Turbine Fuel,
Aviation, Grade JP-8
Water Absorption
24 hours at 23 ± 3ºC (73 ± 5ºF)
Percent 0.5 maximum ASTM D 2671
