In 2024, there was an incident where a small tube trailer hydrogen rupture discs activated prematurely between 1200 - 1500 psig (typically these rupture discs activate @ ~ 3300 psig). The rupture discs exist to protect the storage tubes in the case of an external fire from overpressure and rupture. The trailer had multiple tubes on the chassis.
The entire tube trailer emptied through the single rupture disc as the tubes were interconnected. No one was hurt, no equipment was damaged, and no fire resulted.
After investigation, it was determined that every storage tube relief device vent piping did not have weather caps on the vent tubes outlets, as required. It was determined that water got into the vent pipes and froze, deforming the rupture disc. This deformation caused the disc to open prematurely between 1200 and 1500 psig. The biggest contributing factor was that the ambient temperature had dropped to 15 Deg F, which was very unusual for this area.
This was a violation of CGA G-5.5 design requirements.
The tube trailer was taken off site by the industrial gas company for end of vent cap additions.
Follow CGA G-5.5 vent end system designs.