Install Valve in Full Pipe
Install Valve in Full Pipe
(OP)
I need to close off a pipe coming out of a tank in order to replace the pipe. The tank is always full so the pipe is always full (can't take out of service). Are there any specialty valves that will clamp on the pipe, then either pinch off the pipe (10" 304 SS) or cut through/close of pipe? Thanks





RE: Install Valve in Full Pipe
I recall in years past that a Mineola Valve & Hydrant (Mineola, Texas) made a cutting-in-valve for this service- would normally be used on DI or PVC, so I'm not sure how it would work with SS. Try a web search for them or for "cutting in valve" and see if you get anything.
RE: Install Valve in Full Pipe
RE: Install Valve in Full Pipe
KRB
RE: Install Valve in Full Pipe
There are a number of different line stopping techniques. Severn Trent has described several on their website:
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You could also use an air bladder or mechanical pipe plug to block the pipe.
RE: Install Valve in Full Pipe
RE: Install Valve in Full Pipe
Contact your local hot (or wet) tap company, there are several brands of line stopping equipment and hot tap insert valves, and the use of a local reputable company who specializes in the process is your best bet.
Hydrae
RE: Install Valve in Full Pipe
RE: Install Valve in Full Pipe
If it is a welded valve and you cannot have any leakage then an air bladder will probably be the most practical.