In a total isomerization plant at a mid-western refinery, there were 658 multiple screwed connections that had to be checked for fugitive emissions.

The refinery used an OVA-108 emission meter to check these connections, and found 91 locations showing hydrogen leakage of up to 1%.

Plant maintenance personnel used several sealants - without success - to try and stop these leaks, including conventional liquid thread sealants, pastes, and tape.

According to plant personnel, "The hydrogen leaked right through the other sealants."

Team personnel suggested using Hi-Pro Seal^®.

The thermosetting resin was applied to all 91 of the leaking joints.

Following Hi-Pro Seal's^® application, all 91 connections sealed and passed inspection for fugitive emissions.

With the application of Hi-Pro Seal^®, plant maintenance personnel also reduced the potential fire hazard posed by hydrogen leakage.