How to handle hot work in a concentrated sulfuric acid tank?
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In my workshop, the flange at the discharge stub at the bottom of a sulfuric acid tank (on the ground) has cracked and needs to be replaced. How should this be handled? Will welding cause it to be prone to corrosion again?
It can be welded directly. . . But the hair dye needs to be replaced. . .
Before welding, the hydrogen content in the storage tank should be checked to prevent explosions.
No hot work analysis is required, but it is advisable to use thick-walled pipes or stainless steel for replacing this splice, and the flanges should also be replaced. Prepare the welding joint properly and clean the welding surface carefully; it is best to have someone with high skill level perform the welding, so as to achieve a result where one-sided welding yields a double-sided finished product.
We all open the bottom manhole and the top manhole, use an explosion detector for testing, and then proceed with the necessary handling.
A flammability check must be conducted when welding at the top