Repair Welding High-Alloy Furnace Tubes (10031)

One of the problems faced by operators of high-temperature reformer and pyrolysis furnaces is repair welding of damaged furnace tubes that have been exposed to elevated temperatures. The primary reason for the difficulty lies in the high carbon content of the common cast heat-resistant alloy tube materials such as HK - 40, the HP alloys, and others known for their superior high-temperature properties.

Recommendations are provided for successfully restoring ductility by solution annealing the base metal prior to welding. Information is supplied on selection of welding filler metals and welding processes.

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