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Issue Date: September 30, 2019
Atmos International Limited
Atmos International Pipeline Leak Detection System
Line Leak Detection Method for Airport Hydrant and Field Constructed Systems
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Certification |
Leak rate of 0.0021% of line volume (0.2 gph per 1000 gallons of product) in the pipeline segment being tested with PD > 95% and PFA < 5%.
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Leak Threshold |
0.001% of line volume in gph.
A pipeline system should not be declared tight if the test results indicate a loss that equals or exceeds the threshold. |
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Applicability |
Gasoline, diesel, aviation fuel, fuel oil #4, solvents, waste oil. |
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Specification |
System tests either single or double-walled fiberglass or steel piping. |
| Pipeline Capacity |
The Atmos 3rd party certified minimal detectable leak rate for bulk pipeline and hydrant systems is listed in the table below by maximum test section volume.
Leak Detection Rate Per Test Section Volume
(EPA maximum allowable/Atmos 3rd party certified)
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Test Section Volume(Gallons) |
EPA Semiannual Test-
Leak Detection Rate Not To Exceed
(Gallons Per Hour) |
EPA Annual Test-
Leak Detection Rate Not To Exceed
(Gallons Per Hour) |
Atmos 3rd party certified minimum detectable leak rate. (Gallons Per Hour) |
5,000 to 23,810 |
1.0 |
0.5 |
0.50 |
23,811 to 47,619 |
1.0 |
0.5 |
1.00 |
50,001 to 71,429 |
1.5 |
0.75 |
1.50 |
75,001 to 95,238 |
2.0 |
1.0 |
2.00 |
100,001 to 119,048 |
3.0 |
1.5 |
2.50 |
119,049 to 142,857 |
3.0 |
1.5 |
3.00 |
142,858 to 166,667 |
3.0* |
1.5 |
3.50 |
166,668 to 190,476 |
3.0* |
1.5 |
4.00 |
190,477 to 201,690 |
3.0* |
1.5 |
4.50 |
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* EPA semi-annual minimum detectable leak rate may be 6.0 gallons per hour until October 13, 2021 for pipe segments greater than 100,000 gallons. After October 13, 2021, the minimum detectable leak rate cannot exceed 3.0 gallons per hour.
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Waiting Time |
None between delivery and testing.
None between dispensing and testing. |
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Test Period |
Typically 26 minutes after setup.
Piping must be isolated and blocked during test. |
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System Features |
System is portable and can be transported from line to line as a means of assessing integrity.
System uses dual pressures: one high, one low to assess pressure change over time and compensate for thermal expansion.
System includes computer-based software that electronically measures and records the pressure in the line. After the two test periods, the system automatically analyzes the data and prints a report.
Pipeline segment being tested must be completely isolated. |
| Calibration |
System must be calibrated in accordance with manufacturer’s instructions. |
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Comments |
Prior to conducting tests on a line, the Atmos Pipeline Leak Detection System must be commissioned to confirm the existing line characteristics for each individual test section.
System may be used on large underground bulk pipelines such as airport hydrant fueling systems.
The third-party evaluation is an update to the July 26, 2016 evaluation to verify the performance of the Atmos system on lower volume lines between 5,001 and 50,000 gallons. An abbreviated set of 6 tests were performed between 15,715 and 23,810 gallons. |
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Atmos International Ltd.
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Evaluator:
Ken Wilcox Associates
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St., Pauls, 781 Windsor Road
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Tel:
(816) 443-2494
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Manchester M20 2RW, United Kingdom
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Date of Evaluation:
07/26
/2016
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02/27/2019
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Tel: +44 161 445 8080
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