PHDleak™
PHDleak™ is a step-pressure leak detection method for testing underground pipelines developed solely by Leak Detection Technologies. The method equipment can be permanently installed on a pipeline or can be transported to any site for the testing period.
PHDleak™ is currently used to test pipelines for railroad companies across the U.S.
PHDleak™ is listed by the National Work Group of Leak Detection Evaluations (NWGLDE) and was evaluated by Ken Wilcox Associates according to EPA protocols.
- PHDleak Pipeline Hydrostatic Diagnostic Test Method (Line Leak Detection Method for Airport Hydrant and Field Constructed Systems)
Leak Detection Rate Per Test Section Volume
(EPA maximum allowable/PHDleak Test 3rd party certified)
| Test Section Volume (Gallons) | EPA Semiannual Test Leak Detection Rate Not to Exceed (Gallons per Hour) | EPA Annual Test Leak Detection Rate Not to Exceed (Gallons per Hour) | PEDIeak Test 3d party certified minimum detectable leak rate (Gallons per Hour) |
|---|---|---|---|
| 5,001 © 29,412 | 1 | 0.5 | 0.5 |
| 29,413 to < 50,000 | 1 | .0.5 | 1 |
| 50,000 to 58,824 | 1.5 | .75 | 1 |
| 58,825 to < 75,000 | 1.5 | .75 | 1.5 |
| 75,000 to 88,236 | 2 | 1 | 1.5 |
| 88,237 to < 100,000 | 2 | 1 | 2 |
| 117,649 to < 125,000 | 3 | 1.5 | 2.5 |
| 125,000 to 147,060 | 3 | 1.5 | 2.5 |
| 147,061 to < 150,000 | 3 | 1.5 | 3 |
| 150,000 to < 175,000 | 3 | 1.5 | 3 |
| 175,000 to 176,472 | 3 | 1.5 | 3 |
*EPA semi-anmual minimum detectable leak rate may be 6.0 gallons per hour until October 13, 2021 fr pipe segments greater than 100,000 gallons. After October 13, 2021, the minimum detectable leak rate cannot exceed 3.0 gallons per half hour