Certification

Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

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, fuel oil #4.

Specification

System tests fiberglass and steel pipelines. 
Where an electronic or mechanical line leak detector is installed in the system, a complete test includes but is not limited to data collection at ambient pressure and at pressures of 7.5, 15, and 22.5 psi. 
Where the line leak detector is removed from the system, a complete test includes but is not limited to data collection at ambient pressure and at a pressure of 22.5 psi. 
Additional data can be collected at pressures higher than 22.5 psi.
Tests can be performed with trapped vapor in pipeline.
Pipeline may be empty, partially full, or full of product during testing.

Pipeline Capacity

Maximum of 172 gallons.
For testing lines greater than 3-inch diameter, contact MassTech.

Waiting Time

None between delivery and testing. 
None between dispensing and testing.

Test Period

Test times varied from 29 to 77 minutes during the evaluation.

Calibration

System is checked biennially and, if necessary, calibrated in accordance with manufacturer's instructions.

Comments

Leak rate during testing was adjusted to an equivalent of 0.1 gph at 45 psi.
System monitors for pressure changes which exceed the predicted environmentally compensated pressure changes.
Test data are acquired and recorded automatically.
Data collected by technicians at the test site are analyzed by trained personnel located off-site who notify owner of their pass/fail determination.