|
|
Fuel
Systems
Appendix A — Fuel System Standard
15.0 — Lab Examination No. 11
Fuel System Static Pressure Test cont'd
15.1 Constraints — Prior
to the start of this test the system is required to be at
a constant ambient temperature of ±5°F for two
hours in order to accomplish the pressure decay test with
an acceptable degree of accuracy. Due to outside temperature
changes, which occur throughout the day, although not required,
it is highly desirable to perform the test inside a building
where some temperature control is available. The system shall
be empty of any gasoline.
15.2 General Description —
The system shall be subjected to a pressure decay test. Upon
successful completion of this test, each component’s
fittings, joints, and connections shall be leak checked using
a leak detection solution or other suitable means capable
of detecting extremely small leaks.
15.3 Test Media — Shop
grade compressed air or gaseous nitrogen. No special analysis
is required. GN2 is preferred, especially if gasoline has
been used in the system prior to this test.
15.4 Test Equipment and Material
|
Component
Find No. |
Title |
Description |
| 1 |
Pressurant Supply Bottle |
Fuel system pressurant, may
be shop grade compressed air or nitrogen. |
| 2 |
Pressure
Regulator |
Manually
controlled pressure regulator to reduce supply bottle
pressure to fuel system test pressure. |
| 3 |
Supply Valve |
Flow control shutoff valve
for pressurant supply. |
| 4 |
Relief Valve |
Manually
adjustable relief valve to prevent fuel system overpressurization. |
| 5 |
Pressure Supply Indicator |
Pressure gauge readable
to 0.25-psi increments or Hg manometer.
Note: The pressure gauge shall have a range not exceeding
three times the test pressure. |
| 6 |
Pressure
Supply Adapter Assembly |
Adapter
to seal the fill hose and provide connectors for the pressurant
supply, pressure indicator and relief valve. |
| 7 |
Pressure Indicator |
If an auxiliary fuel
tank is installed a pressure gauge readable to 0.25-psi
or Hg manometer is required to be located in the fill
pipe to that tank.
Note: The pressure gauge shall have a range not exceeding
three times the test pressure. |
Previous |
Next
|
|
