Hot Tap
Hot Tap
(OP)
Has anyone ever done/seen a hot top done on a weld cap before? Not a typical procedure, but I am looking for examples from someone who has done on through the weld cap.
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RE: Hot Tap
One was a 3" and one was a 4".
Can you comeback with some more details as to sizes , temperature, and pressure?
RE: Hot Tap
RE: Hot Tap
I would run this by the people that are going to do the actual hot tap.
They can also help with the details on testing the nozzle prior the the actual tapping.
RE: Hot Tap
The Hot Tap guys were concerned about a proper weld profile with a 8" on 12" tap.
Like Syd said, talk it over with the experts who specialize in hot taps, plugging, etc.
RE: Hot Tap
But... Would you consider using a 12" x 10" reducer, pushed up against the cap and welded out to provide a continuous outside profile / wall thickiness from the 12" line to the reducer. Or, a 12" long weld neck flange - same thing, butt it up against the cap and weld it out. You'll basically wind up with a solid 12" pipe by the time you're done cutting the coupon out of the cap.
jt
RE: Hot Tap
I assume that since you asked about hot tapping you either don't have any downtime on the line to make use of, management doesn't want you to wait for that downtime, or some other good reason not to wait and do a standard pipe run.
RE: Hot Tap
Approaching size on size presents different considerations, ie, curvature and depth of cutting heads needs to be considered.
An experienced hot tap service company can assist in the design and guide you through the process. It should help eliminate any pitfalls.
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