INCIDENT OVERVIEW
A hairline crack formed in a suction header pressure gauge line resulting in a minor leakage of ammonia.
INVESTIGATION CONCLUSIONS
The suction header pressure gauge line in question was ¼ inch steel tubing which connected the ammonia suction header to the pressure gauge installed in front of the engineer’s control room so that engineer on watch can visually monitor the pressure in the ammonia suction header.
Failure scenario(s)
A section of steel tubing was DAMAGED BY CORROSION leading to a crack in the tube wall and ammonia leakage.