Helium leak detection.
A diagnostic run after a failed compliance test to locate the actual leak. PTTI introduces helium and uses a specialized sniffer to detect PPM concentrations against atmospheric air.
Manufacturer-certified · EPA 40 CFR Part 280 · Testing tanks since 1997
Pinpoint leak location after a failed line tightness test, tank tightness test, Stage I system, or containment failure.
How we run it.
Helium leak detection is a diagnostic procedure, not a routine compliance test. PTTI uses it when another test has failed and the customer needs to localize the leak before repair.
The procedure starts by purging the system completely and removing all fuel. Helium is then introduced into the system being investigated. For a line, helium is introduced into the line. For a Stage I system, a vent tree is installed on top and helium is introduced through it. For a tank, helium is introduced directly.
The technician drills holes in the concrete above the suspected run. A specialized sniffer detects helium in parts per million against the surrounding atmospheric air. The concentration pattern pinpoints the leak location, with higher readings closer to the source.
- Equipment
- Helium tank. Vent tree for Stage I systems. Concrete drill. A specialized helium sniffer that reads concentration in parts per million.
- Frequency
- As needed, as a post-failure diagnostic.
- Deliverable
- A notes-and-findings report identifying the leak location, with photo documentation of the drilled probe pattern and the concentration map. PTTI completes the diagnostic and locates the leak. The repair itself is handled separately.
What we look for.
-
1
After a failed line tightness test
Used when silver bullet isolation cannot conclusively determine line versus equipment.
-
2
After a failed tank tightness test
When audible leak detection identifies a problem but a physical location is needed for excavation.
-
3
After a containment failure
A sump or transition-sump leak that requires pinpoint location before excavation.
Frequently asked.
When do you use helium leak detection?
After a compliance test fails or comes back inconclusive and the leak has to be physically located before repair. It follows a failed line tightness test, tank tightness test, Stage I test, or a containment failure.
How accurate is helium leak detection?
The sniffer reads helium concentration in parts per million against atmospheric air, and the concentration pattern localizes the leak for excavation or repair, with higher readings closer to the source.
Is concrete patching part of the helium scope?
PTTI completes the diagnostic and locates the leak, and delivers a notes-and-findings report. Concrete patching and the repair itself are the operator's responsibility once the leak is located.