Issue
Date: November 22, 1995
Revision Date: April 28, 2005
OPW
Fuel Management Systems
(originally listed as Emco Electronics, Tuthill
Transfer Systems)
EECO
System LLD (for Flexible Pipelines)
AUTOMATIC
ELECTRONIC LINE LEAK DETECTOR
Certification
|
Leak
rate of 3.0 gph at 10 psi* 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.
|
Leak
Threshold
|
2.0
gph for leak rate of 3.0 gph.
0.0793 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.
|
Applicability
|
Gasoline,
diesel, aviation fuel, fuel oil #4.
|
Specification
|
System
tests pressurized flexible pipelines.
Tests are conducted at operating pressure. |
Pipeline
Capacity
|
Maximum
of 49.6 gallons.
|
Waiting
Time
|
None
between delivery and testing.
None between dispensing and testing for leak rate of 3.0
gph.
Minimum of 14 minutes between dispensing and testing for
leak rate of 0.1 gph.
|
Test
Period
|
Response
time is 11 minutes, 24 seconds for leak rate of 3.0 gph.
Minimum of 9 hours for leak rate of 0.1 gph.
Test data are acquired and recorded by a microprocessor.
Calculations are automatically performed by the microprocessor.
|
System
Features
|
Permanent
installation on pipeline.
Automatic testing of pipeline.
Preset threshold.
Single test to determine if pipeline is leaking.
Pump shutdown, message display, and alarm activation if
leak is declared.
|
Calibration
|
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.
|