Posted by Jim burke
on 12/9/2008, 6:52 am, in reply to "Welding pipes under pressure - Water"
69.224.32.177
As , Inc I have just a little experience in the field. I have 2 suggestions that will work. One will cost a fair amount of money, but will render the line fixable if you experience future failures. The other is fairly simple, direct, immediate, but does nothing to prevent future problems.
I just happened to catch your post, so these 2 ideas are free, for what they are worth.
1. Hot-tap a valve into the line up-stream, close of flow, repair as usual.
2. look up 'CLOCK-SPRING' ON THE INTERNET, PURCHASE A PIPE WRAP REPAIR SET CALLED A "CLOCK SPRING"-WRAP PIPE FOLLOWING THEIR INSTRUCTIONS.
www.clockspring.com-ps-I have no affiliation with this company-I just was asked if I knew what it was one day, went looking and I really like their solution to leaks.
3. My experience with welding pipe under pressure with water behind the weld is that as long as there is just a few psi of pressure the weld will be leaking upon hydro-test- you may be somewhat successful in buttering the split on both sides, eventually slowing down the flow to where you can wrap the pipe with a clock-spring wrap to close off the leak
Please feel free to call or email me if you would like further detailed information.
Jim Burke, Pres and Chief Consultant
Welding Quality Management Services, Inc
707-761-3873, 661-947-9698
I usually charge for standard consulting work as a Welding Engineer/QA-QC Specialist. I specialize in writing welding procedures, Quality Assurance Manuals, welding quality control plans, qualifying procedures and Welders. I also perform field Construction/Welding/piping/vessel/struct steel inspection and quality monitoring, at reasonable rates for longer duration assignments
I am a Degreed Welding Engineer/NDE specialist with 28 years of experience working on power plants, refineries, petrochemical, shipping, piping, turbines, compressor stations, storage tanks, etc.
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