hot tap failures
hot tap failures
(OP)
We are looking to carryout a risk assessment for multiple hot taps with stopple interventions. Does anyone know good sources for industry failure data that may be used to support determination of failure frequency/ probability.
This could potentially be done for one if data was avialble.. any suggestions on how to look at increase in failure likelehood if this needs to be done multiple times - upto 30
This could potentially be done for one if data was avialble.. any suggestions on how to look at increase in failure likelehood if this needs to be done multiple times - upto 30





RE: hot tap failures
RE: hot tap failures
Thanks. The 'multiple' taps is at a number of different locations but essentially performing the same task.
RE: hot tap failures
If you can do it safely once you should be able to do it safely 30 times or even 300 times.
The only time I have been involved with stopple valves was inserting a Tee in a live methanol line. We had a stopple valve and then 2 x balloons as back ups.
To have a failure/accident we had to have failure in all 3 very expensive items.
Risk assessment should be able to factor out any possibilities of failure,
Cheers,
Kiwi
RE: hot tap failures
K
RE: hot tap failures
A Hot-Tap "raises the hair on the back of the neck" of any cognizant engineer or Inspector. Everything gets double-checked, and usually triple- or quadruple-checked. It is a pretty simple process, but the consequences for failure includes maiming and death, and $$millions in liabilities due to the injuries and lost production. Besides, the final Inspectors will be the guy(s) that are operating the Hot-Tap machine. Since any catastrophe will involve them first, they REALLY look things over.