ALIIM99
Mechanical
- Feb 28, 2024
- 1
Hi All,
we have gone thru a tube to tubesheet weld failure causing many joints leak for shell and tube reactor (steam generator). steam in shell side and gas in tube side.
tube made duplex SS (UNS 32205) and tubesheet is low alloy 1.25cr-0.5Mo with Ni82 overlay. so, the failed weld is between duplex tubes and nickel 82 clad (welding filler is Ni82).
I came to know thru many reading and technical discussion that such welding combination is not recommended as there is a high chance of forming intermetallic components and affecting toughness and corrosion properties (reference API 582).
Any previous experience or input is appreciated!
we have gone thru a tube to tubesheet weld failure causing many joints leak for shell and tube reactor (steam generator). steam in shell side and gas in tube side.
tube made duplex SS (UNS 32205) and tubesheet is low alloy 1.25cr-0.5Mo with Ni82 overlay. so, the failed weld is between duplex tubes and nickel 82 clad (welding filler is Ni82).
I came to know thru many reading and technical discussion that such welding combination is not recommended as there is a high chance of forming intermetallic components and affecting toughness and corrosion properties (reference API 582).
Any previous experience or input is appreciated!