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3-29.4
Preparations for Testing Cont'd.
g.
Have caps, plugs and blinds available to blank off section under test.
h.
After all the TPT equipment, hose, valves, and fittings are physically connected, there should be a meeting of all
responsible personnel connected with the testing program. Each phase of the test plan including a detailed
communication plan shall be discussed and reviewed. Prior to filling a section for test, a final check should be made to
verify the following:
1)
All valves are in proper position for filling.
2)
All hoses, valves and fittings connections are tight. Valve packing glands tight.
3)
Pumps are in good working condition.
4)
Test gages are installed and ready for use.
3-29.5
Test Procedure. Test procedure will vary with test medium used.
a.
Water. Valves are to be adjusted so that water can be pumped through the section under test, exhausting air
and air water mix. Slowly pump water into the system. When all air is evacuated, discharge valves should be closed,
section filled with water and pump stopped. Check all connections for leaks, if no leaks are found, start pump and raise
pressure to 25 psi, stop pumps, check for leaks, and check gages. If no leaks are found and gages are okay start pump
and raise pressure to selected test pressure. Stop pump, check for leaks, check gages, and record time, pressure and
ambient temperature on test report. Test should be held for 8 hours, or an other time as determined by on site
conditions. Pressure will vary with temperature change. If a major change occurs, it might become necessary to add to
or drain water from the test section. Water added or removed must be measured and noted on test report. The pressure
and temperature must be checked and noted on test report at one-half hour intervals. Any leaks found and size and type
of leak must be noted on test report, this information is required to approve the system for operation.
b.
Fuel. In general, the procedure for testing with fuel is the same as with water, except for the following:
1)
See Paragraphs 3-29.4d, e, and f above.
2)
Arrangements have to be made to catch and dispose of fuel used in purging air from system.
3)
No smoking rules and regulation must be established and enforced.
c.
Air. Only a clean, vapor free system can be tested with air. Test pressure should be no more than 50 psig, to
reduce the danger of whip if a hose comes loose. When testing with air no purge is necessary. The test section should
be blanked-off and an air compressor connected to it. Disconnect both fill and suction hoses from any fabric tank in the
system. Before starting the compressor, check all connections for tightness, all valves for position and the gages for
accuracy. Start compressor and raise pressure to 10 psig, stop compressor and check all fittings for leaks. If no leaks
are found, start compressor and raise pressure to 50 psig, or other as selected. Record time, pressure and ambient
temperature on test report. After 30 minutes, if all appears okay, check all connections with soap suds to assure there are
no leaks. Then continue test for 8 hours, or an other time as determined by site conditions.
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