Issue Date: January 27, 2011
Revision Date:
April 21, 2015
Leak Detection Technologies
Pipeline Hydrostatic Diagnostic Test Method (PHDleak
Test)
Line Leak Detection Method for Airport Hydrant and Field Constructed Systems
Certification |
Leak rate of 0.0017% of pipeline volume (0.000017 gph per
gallon of product) in pipeline segment being tested with PD = >95% and PFA = <5%.
The US EPA has not set a minimum detectable leak rate for large diameter
pipeline systems (airport hydrant systems) at the time of this evaluation. |
Leak Threshold |
0.00085% of line volume in gph (0.0000085
gph per gallon of product).
A pipeline system should not be declared tight if the test
results indicate a loss that equals or exceeds the preset threshold. |
Applicability |
Gasoline, diesel, aviation fuel, fuel oil #4, solvents, waste oil,
biodiesel B6-B20 meeting ASTM D7467, biodiesel B100 meeting ASTM D6751,
crude oil, petroleum distillates in liquid form, cooling fluids, and water
or water soluble liquids. |
Specification |
System tests either
single or double-walled fiberglass or steel piping. |
Pipeline Capacity |
Minimum of 2,000
gallons, maximum of 1,127,000 gallons. |
Waiting Time |
None between delivery and testing.
None between dispensing and testing. |
Test Period |
Minimum of 24 minutes after setup for data
collection.
Piping must be isolated and blocked during
test. |
System Features |
System may be permanently installed on
pipeline to perform monitoring, or may be transported and set up to perform
line tightness testing.
Total minimum time for data collection and
analysis is 35 minutes. System measure change in pressure gradients
and reports output quantity in gph, while compensating for thermal and
pipeline "creeping" effects. Pipeline segment being tested must be
completely isolated and have pressure control. Over pressurization is
managed utilizing a backup pressure relief valve. |
Calibration |
System must be
calibrated in accordance with manufacturer's instructions. |
Comments |
System may be used on large underground
bulk pipelines such as airport hydrant fueling systems.
Manufacturer claims system is applicable
to any size of underground pressurized piping, typically between 2,000 and
1,128,206 gallons.
The third-party evaluation utilized a
total of 24 tests. 18 of these tests were conducted with various
induced leak rates. |
Leak Detection Technologies
|
Evaluator:
Ken Wilcox Associates
|
2765 East Wieding Road
|
Tel:
(816) 443-2494
|
Tucson, AZ
85706
|
Date of Evaluation:
01/04/11
|
Tel: 855-255-5325
|
|
E-mail:
info@LeakDetect.com |
|
URL:
www.LeakDetect.net
|
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is it any guarantee of the performance of the method or equipment.
Equipment should be installed and operated in accordance with all applicable
laws and regulations. For full details, please refer to our expanded "DISCLAIMER"
page.
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