Certification
|
Leak
rate of 10 gph at 100 psi with PD > 95% and PFA <
5%.
(EPA defined equivalent 3.0 gph at 10 psi).
The USEPA has not set a minimum detectable leak
rate for large diameter pipeline systems (airport hydrant
systems) at the time of this evaluation.
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Leak
Threshold
|
8 gph.
A pipeline system should not be declared tight if pressure
decay or change in rate of decay in protected segment
indicates a leak that exceeds this threshold.
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Applicability
|
Gasoline,
diesel, aviation fuel, fuel oil #4.
Other liquids may be tested after consultation with the
manufacturer.
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Specification
|
System
tests fiberglass or steel piping up to 18 inches diameter.
Tests are normally conducted at operating pressures of
50 to 150 psi, but system may not work at pressures less
that 75 psi, and may need to be 100 psi or higher.
System may be used on pipelines pressurized up to 400
psi
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Pipeline
Capacity
|
Maximum
of 212,000 gallons.
Evaluation conducted on straight piping runs with capacities
to 106,000 gallons.
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Waiting
Time
|
None
between delivery and testing.
None between dispensing and testing.
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Test
Period
|
Variable
up to 15 minutes.
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System
Features
|
Permanent
installation on pipeline.
Automatic testing under static conditions.
Preset thresholds.
Single test to determine if pipeline is leaking.
Message display or printout, alarm activation if leak
is declared.
Test data acquisition and calculation by system's computer.
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Calibration
|
System
must be checked annually and, if necessary, calibrated
in accordance with manufacturer's instructions.
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Comments
|
According
to vendor, system works in a complex piping network, can
detect leaks developed between static test times, and
is capable of detecting gradually increasing leaks once
they reach the system's detection range. However, not
all these features were demonstrated during this evaluation
or other field demonstration testing.
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