In a heat exchanger, if hydrogen sulfide is used in the tube side, how should heat treatment for that side be considered?
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In a heat exchanger, if hydrogen sulfide is used in the tube side, how should heat treatment for that side be considered?
Fixed tube sheet type? Floating head type? U-tube type?
The two tube boxes are subjected to overall heat treatment, while the joints between the heat exchange tubes and the tube sheets are treated locally.
Heat treatment of tube boxes is straightforward, but that of tube ends is not so easy; quality control presents great challenges.
Overall heat treatment is carried out on the tube box; the tube sheet and shell also undergo overall heat treatment. Strict control of the furnace temperature is required, which demands experience. We designed it to do this. It is also possible to perform local heat treatment on the tube sheet and heat exchange tubes, but it is difficult to control the effects.
It depends on the other media present, whether it is a wet hydrogen sulfide corrosion environment or a severe hydrogen sulfide corrosion environment; in such cases, heat treatment requirements will apply. There are several heat treatment methods for pipe ends and tube sheets; local heat treatment is possible, as is overall heat treatment (with the need to control the rate of temperature increase). It is also possible to weld one end first, perform heat treatment, and then weld the other end
Given the wet hydrogen sulfide corrosion environment in the tube side, what is the purpose of heat treatment for the welds of the \"tube sheet and shell\" in the shell side?
“\"Tube sheet and shell\" refers to the heat treatment of the tube sheet, heat exchange tubes, and the tube ends after they are welded together. I thought everyone would understand the abbreviation: lol