Certification
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Leak
rate of 3.0 gph at 10 psi* with PD = 100% and PFA =
0%.
Leak
rate of 0.2 gph at operating pressure with PD = 100%
and PFA = 0%.
Leak rate of 0.1 gph at 1.5 times operating pressure*
with PD = 100% and PFA = 0%.
*Since leak rate varies as a function of pressure, this
leak rate and pressure were certified using an equivalent
leak rate and pressure, in accordance with an acceptable
protocol.
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Leak
Threshold
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1.5
gph for leak rate of 3.0 gph.
0.1 gph for leak rate of 0.2 gph.
0.05 gph for leak rate of 0.1 gph.
A pipeline system should not be declared tight if the
test result indicates a loss that equals or exceeds this
threshold.
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Applicability
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Gasoline,
diesel, aviation fuels, fuel oil #4.
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Specification
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System
tests pressurized fiberglass and steel pipelines.
Tests are conducted at operating pressure.
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Pipeline
Capacity
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Maximum
of 163 gallons.
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Waiting
Time
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None
between delivery and testing.
None between dispensing and testing for leak rate of 3.0
gph and 0.2 gph.
Minimum of 8 hours between dispensing and testing for
leak rate of 0.1 gph.
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Test
Period
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Response
time is 3 minutes for leak rate of 3.0 gph.
Response time is 50 minutes to 8 hours for leak rate of
0.2 gph.
Response time is 40 minutes for leak rate of 0.1 gph.
Test data are acquired and recorded by a microprocessor.
Calculations are automatically performed by the microprocessor.
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System
Features
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Permanent
installation on pipeline.
Automatic testing of pipeline.
Preset threshold.
Single test to determine if pipeline is leaking.
Pump shutdown, numerical "fail" code display
and LED alarm light activation if leak is declared.
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Calibration
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Equipment
must be checked annually for capability of detecting a
line leak of 3.0 gph and, if necessary, calibrated in
accordance with manufacturer's instructions.
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Comments
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For
test using leak rate of 0.2 gph only:
After 28 days have elapsed since the last passing
monthly line leak test, system shuts off the submersible
pump.
System display will flash number of days since the last
passing test. Operator may reset button to enable dispensing
for a 24 hour period.
This procedure may be used for a maximum of 4 days.
After 32 days have elapsed since last monthly test, system
will disable dispensing and automatically initiate a test,
and system will not authorize dispensing until a test
is passed or system is serviced.
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