repair of pipe line
repair of pipe line
(OP)
during repair of pipeline the welding of new part to the old one failed and many defects observed ( specially the root undercut and lack of fusion), how avoid such things?
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RE: repair of pipe line
RE: repair of pipe line
We observe during welding that the fusion of base metal (old material side) is going faster than the new material, it seem that the characteristic (weld-ability ) of old material changed
- pipe line 6"
- material A106 Grb
- Service : crude oil with height level of water cut and pipeline in service since 10 years.
RE: repair of pipe line
If in doubt try to find a section you can test - you might have got some pipe which is not supplied to specification - either new pipe or old pipe. Forging of certificates happens.
If the pipe is empty why didn't you radiograph the weld?
If it's a tie in weld then UT or RT should spot some of these issues before you pressurize the pipe.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: repair of pipe line
RE: repair of pipe line
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: repair of pipe line
RE: repair of pipe line
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: repair of pipe line