Issue Date: June 19, 1996
Revision Date: December 4, 2002
EFA Technologies, Inc.
LeakNet
Large Diameter Line Leak Detection Method (6 Inches Diameter Or Above)
| Certification | Leak rate of 3.0 gph at 10 psi with PD = 100% and PFA = 0%. 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 | 2.2 gph. A pipeline system should not be declared tight if the test result indicates a loss or gain that equals or exceeds this threshold. |
| Applicability | Gasoline, diesel, aviation fuels, fuel oil #4, waste oil. Other liquids may be tested after consultation with the manufacturer. |
| Specification | System tests pressurized bulk material transfer pipelines. Suitable for all pressurized steel, plastic, fiberglass, or concrete pipelines. System is used as an equivalent 3 gph line leak detector. Leak detection flow rates are proportional to pressure in pipeline. Testing is conducted while the product is not flowing in the pipeline. Pipeline must be full and under pressure. Gravity feed pipelines under constant static head pressure may be tested with system. |
| Pipeline Capacity | Maximum of 116,230 gallons. System tested on 58,115 gallon pipeline. Use of pipeline test protocol allows system to be used on pipelines twice the volume of test pipeline. Contact manufacturer prior to using on pipelines exceeding 58,115 gallons through 116,230 gallons. |
| Waiting Time | None between delivery and testing. None between dispensing and testing. |
| Test Period | Response time is 2 to 5 minutes. Test data are acquired and recorded by system's computer. Calculations are automatically performed by system's computer. |
| System Features | Permanent installation on pipeline. Automatic testing of pipeline at least once per hour under static conditions. Continuous operation during flowing conditions (however, thresholds are higher due to hydraulic noise in pipeline). Declaration of leak if current changes in pressure exceed tuning parameters, or if pressure fluctuates in a manner that is characteristic of a leak. Pump shutdown, indicator light and alarm activation if leak is declared. |
| Calibration | System must be checked annually. Standard electronic field instruments used by the system requires normal annual inspection and calibration checks. |
| Comments | Designed to replace a mechanical line leak detector to detect equivalent 3 gph releases at 10 psi on large pipelines at pressures higher than those found at typical service station. |
- EFA Technologies, Inc.
116 20th St.
Sacramento, CA 95814
Tel: (916) 443-8842 - Evaluator: Ms. Terri Regan
Naval Facilities Engineering Service Center
Tel: (202) 433-5196
Date of Evaluation: 09/26/95
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