The tank top plate is 6 millimeters thick – how many weld passes are appropriate?
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I would like to ask the expert: how many times is it appropriate to weld the tank top plate? How many times should the tank wall panels be welded?
This needs to be determined based on the design of your tank – what type of tank it is, whether it operates at atmospheric pressure or under reduced pressure. Generally, tanks are constructed by oneself in cases of atmospheric pressure applications, but nowadays the requirements are very strict; self-construction is usually not allowed, and instead tanks have to be purchased or constructed by qualified companies. Some nonsense was said – generally, to weld 6-millimeter thick sheets, it takes three passes: one for filling the gaps, one as a base coat, and one as a top coat. That’s fine then.
For 4 electrodes, it’s usually sufficient to pass over them slowly once, but make sure there are no omissions. It would be better if two attempts were required