UST Programs - LG 113

Issue Date: November 22, 1995
Revision Date: May 3, 2002

Tanknology - NDE

TLD-1

LINE TIGHTNESS TEST METHOD

Certification	Leak rate of 0.1 gph with PD = 99.5% and PFA = 0.5%.
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 fiberglass and steel pipelines. Tests are conducted at 150% operating pressure. Mechanical line leak detector must be removed or manually isolated from pipeline for duration of test, or check valve in pump must be manually closed if testing is to be conducted with mechanical line leak detector in place.
Pipeline Capacity	Maximum of 172 gallons.
Waiting Time	Testing may begin immediately after system is installed in the line.
Test Period	Response time is 30 minutes to 6 hours. 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.

Tanknology - NDE	Evaluator: Ken Wilcox Associates
8900 Shoal Creek Blvd. , Building 200	Tel: (816) 443-2494
Austin , TX 78757	Dates of Evaluation: 12/29/91, 03/04/02
Tel: (800) 800-4633

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.