Flow Requred for Hot Tapping
Flow Requred for Hot Tapping
(OP)
Welding a 4" WOL on a std wt 10" live fuel line. The fuel is gasoline. This line runs from a tank farm some miles away to a port. We are sure the line is completely purged of all air. It would be very difficult to have any flow during the operation.
Must there be a minimum flow to weld the WOL on? API-2201 is a little vague. Elsewhere I have read that you can do this with no flow on a case by case basis.
My thoughts are to weld one pass at a time. The far end of the mainline at the tank farm is open to the tank which is vented - so over pressure due to thermal expansion is not an issue.
Must there be a minimum flow to weld the WOL on? API-2201 is a little vague. Elsewhere I have read that you can do this with no flow on a case by case basis.
My thoughts are to weld one pass at a time. The far end of the mainline at the tank farm is open to the tank which is vented - so over pressure due to thermal expansion is not an issue.





RE: Flow Requred for Hot Tapping
Empty the tank and fill it during the hot tap.
Let your contractor worry about these things.
you must get smarter than the software you're using.
RE: Flow Requred for Hot Tapping
RE: Flow Requred for Hot Tapping
Why not rent something to put at the beginning of the pipeline, pump it from the tank at hot tapping minimum flow rate to there. The hot tap won't care which way the flow goes.
you must get smarter than the software you're using.
RE: Flow Requred for Hot Tapping
Talk to the hot tap valve supplier for their limitation on the pressure for the hot tapping operation.
Hope it helps.
RE: Flow Requred for Hot Tapping
RE: Flow Requred for Hot Tapping