UST Programs - LG 113

Issue Date: May 2, 2000

Tanknology - NDE

TLD-1 (for Flexible Pipelines)

LINE TIGHTNESS TEST METHOD

Certification	Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.1%.
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 50 gallons.
Waiting Time	Average of 1 hour.
Test Period	1 to 6 hours. Average is 2 hours 15 minutes. 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 1,280 was used during evaluation. *See glossary.

Tanknology - NDE	Evaluator: Ken Wilcox Associates
8900 Shoal Creek Blvd. , Building 200	Tel: (816) 443-2494
Austin , TX 78757	Date of Evaluation: 04/30/94
Tel: (800) 800-4633

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Equipment should be installed and operated in accordance with all applicable laws and regulations.
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