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What happened?
When a heavy door to the lower level of the platform was closed, a differential pressure (DP) weighing 17kg (38lbs) fell from its mounting block.
Firstly, it hit a conduit, fell 1.5m (5ft) striking a control panel, then it fell a further 2.5m (8ft) onto the deck below.
No personnel were in the area at the time, so no one was injured.
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Why did it happen?
The vibration of the door on a lower level caused the bracket to fail, allowing the DP cell to fall off.
The bracket connecting the DP cell to the mounting post was corroded.
DP cells were decommissioned in 1989 and abandoned in place. Most of the cells have been removed in the meantime, only two remaining on site.
Inspection programs were not designed to look at ‘out of service’ units.
Previous hazard hunts for dropped objects didn’t recognise the drop potential of the DP cell.
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What did they learn?
Integrity inspection programmes should include checks on out of service equipment at heights. Ensure such equipment is properly secured until removal.
Workers conducting rounds or hazard hunts should be able to recognise elevated equipment with inadequate support.
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Ask yourself or your crew
How do you know if there is any ‘out of service’ equipment at heights on our site? How do you check it is properly secured?
Have you ever been part of a hazard hunt?
- What did you spot?
- How can you record and report any hazards?
How do you inspect equipment that is hard to reach? How do you secure it?
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Published on 01/04/21
1946 Views
A differential pressure cell weighing 17kg (38lbs) fell from its mounting post onto a deck 4m (13ft) below. No personnel were in the area at the time, so no one was injured.
