duplex weld overlay on x65 pipe
duplex weld overlay on x65 pipe
(OP)
Is it possible to deposit duplex overlay to the bore of say x65 pipe without utilising a buttering run of dissimillar material before hand, and would i still have a interpass temperature issue as is the case with girth welds.
thanks
thanks





RE: duplex weld overlay on x65 pipe
RE: duplex weld overlay on x65 pipe
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: duplex weld overlay on x65 pipe
RE: duplex weld overlay on x65 pipe
it will undoubtabley be for corrossion purposes, i will try to convince the customer that a 625 overlay would be more suitable.
I was more worried about metalurgical problems at the interface between the carbon steel and the duplex, dillution at the surface of the cladding i dont see as a problem as it will be done in two passes.
thanks to all who replied.
RE: duplex weld overlay on x65 pipe
S
Corrosion Prevention & Corrosion Control
RE: duplex weld overlay on x65 pipe
The weld filler grade of duplex will help assure that you get the correct phase balance. Moving to 625 will cost significantly more, and unless it is also done in multiple passes may not offer any better corrosion resistance.
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