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Issue
Date: January 27, 2011
Revision Date: April 21, 2015
Leak Detection Technologies
Pipeline Hydrostatic Diagnostic Test Method (PHDleak Test™)
LARGE DIAMETER LINE LEAK DETECTION METHOD (6 inches diameter or above)
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Certification
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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 USEPA 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. |
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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. Other liquids may be tested after consultation with the manufacturer.
*NWGLDE Listings apply to leak detection functionality only and not material compatibility - see "Disclaimer". |
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Specification |
System tests either single or double-walled fiberglass or steel piping. |
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Pipeline
Capacity |
Minimum of 2,000 gallons, maximum of 1,127,000 gallons. |
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Waiting
Time |
None between delivery and testing.
None between dispensing and testing. |
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Test
Period
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Minimum of 24 minutes after setup for data collection.
Piping must be isolated and blocked during test. |
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System Features
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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. |
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Calibration
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System must be calibrated in accordance with manufacturer's instructions. |
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Comments
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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 |
| 1889 North Oracle Road |
Tel: (816) 443-2494 |
| Tucson, AZ 85705 |
Date of Evaluation: 01/04/11 |
| Tel: (855) 255-5325 |
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| Email: info@LeakDetect.com |
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| URL: www.leakdetect.net |
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