Issue Date:  February 15, 2012

United Testing Systems

U.T.S. 6000 Line Tester



Leak rate of 0.1 gph with PD = 99.9% and PFA = 5%.

Leak Threshold

0.03 gph. 
A pipeline system should not be declared tight if the test result indicates a loss that equals or exceeds this threshold.


Gasoline, diesel, aviation fuel, fuel oil #4. 


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 if testing is to be conducted with mechanical line leak detector in place, check valve in pump must be manually closed.

Pipeline Capacity

Maximum of 44 gallons.

Waiting Time

None between delivery and testing.  30 minutes between dispensing and testing.

Test Period

1 hour under ideal conditions.  Actual test time will depend on line size and temperature conditions at the site.
Data is collected every 5 minutes. 
Three consecutive consistent readings are required for a valid test, with the first reading taken at zero time.
Test data are acquired and recorded manually. 
Manual calculations performed by the operator on site.


No temperature sensors used. 
No calibration required. 
System must be checked annually in accordance with manufacturer's instructions.
Technicians must be certified by the manufacturer prior to using this equipment, and recertified every two years.


United Testing Systems

Evaluator:  Midwest Research Institute

R.R. 1, Box 44

Tel:  (816) 753-7600

Beulah, ND 58523

Dates of Evaluations: 12/22/94

Tel: (701) 748-2381


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Equipment should be installed and operated in accordance with all applicable laws and regulations.  For full details, please refer to our expanded "DISCLAIMER" page.