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Issue Date: November 22, 1995
Revision Date: September 22, 2009
Tanknology
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. |
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Tanknology
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Evaluator:
Ken Wilcox Associates
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11000 North MoPac Expressway, Suite 500
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Tel:
(816) 443-2494
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Austin, TX 78759
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Dates of
Evaluations:
12/29/91, 03/04/02
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Tel: (800) 800-4633
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