Issue Date: November 22, 1995
April 28, 2005
Automatic Line Leak Detector with Version X-76 DM-4 Microprocessor and JT-H2
Line Pressure Sensor
AUTOMATIC ELECTRONIC LINE LEAK
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
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
||0.831 gph for
leak rate of 3.0 gph.
0.066 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.
aviation fuel, fuel oil #4.
pressurized fiberglass and steel pipelines.
Tests are conducted at operating pressure.
System will not
function with a mechanical line leak detector installed in the pipeline.
||Maximum of 45
delivery and testing.
None between dispensing and testing for leak rate of 3.0 gph.
Minimum of 2 hours between dispensing and testing for leak rate of 0.1
||Response time is
20 seconds for leak rate of 3.0 gph.
Response time is 20 minutes for leak rate of 0.1 gph.
Test data are acquired and recorded by a permanently installed
Calculations are automatically performed by the microprocessor.
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.
||System must be
checked annually and, if necessary, calibrated in accordance with
Midwest Research Institute
Hills, CA 91367