Is it okay to not heat treat the backing plate of dry desulfurization tower after welding?
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Due to a design error in the dry gas desulfurization tower, the direction of the ladder platform pad is wrong, and the pad must be re-welded at another location. The tower has been heat treated. Is it feasible to bake the pad with oxygen and acetylene for a period of time after welding the pad? (As heat treatment). It is impossible to heat treat the whole tower. Is there any other good way? Tower overview. Diameter DN1200, PN2.0, wall thickness 12, material 20R. Medium dry gas (containing a small amount of H2S). Temperature 60
It is possible. It is recommended to intermittent welding, reduce the welding angle height, lower the welding current, and preferably use gas shielded welding. If you are still unsure, you can do a welding process assessment first.
I think it should be locally heat treated, using electric heating tape or something like that. If the oxyacetylene flame can replace the local area, it would be too cheap.