UST Programs - LG 113

Tanknology - NDE
TLD-1 (for Flexible Pipelines)

LINE TIGHTNESS TEST METHOD

Certification	Leak rate of 0.1 gph with PD = 99.7% and PFA = 0.3%.
Leak Threshold	0.05 gph. A pipeline system should not be declared tight if the test result indicates a loss that equals or exceeds this threshold.
Applicability	Gasoline, diesel, aviation fuel.
Specification	System tests flexible pipelines. Tests are conducted at 150% operating pressure. Mechanical line leak detector must be removed or isolated from pipeline for duration of test.
Pipeline Capacity	Maximum of 119.4 gallons.
Waiting Time	Testing may begin immediately after system is installed in the line.
Test Period	Minimum of 30 minutes. Consistent readings for at least three readings must be obtained for a valid test. The actual test time will depend on line size and temperature conditions at the site. The data from this evaluation suggests that the actual minimum test time is 50 minutes for a line of this capacity. Test may not be ended until pass/fail criteria set by manufacturer has been met. Pipe deflection, vapor pockets, and large temperature differences may produce inconsistent readings. Testing must continue until stable conditions are present. Test data are acquired and recorded manually.
Comments	Enviroflex pipeline wih a bulk modulus* of 8,359 was used during evaluation. *See glossary.

Tanknology - NDE
8900 Shoal Creek Blvd. , Building 200
Austin , TX 78757
Tel: (800) 800-4633

Evaluator: Ken Wilcox Associates
Tel: (816) 443-2494
Dates of Evaluation: 04/30/94 , 07/22/07

Appearance on this list is not to be construed as an endorsement by any regulatory agency nor 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.