Why should stainless steel tube be annealed?

General stainless steel pipe, if the inner wall needs to go to a certain medium, there is a certain pressure, are recommended to do annealing. Because the pipe in the process of welding forming and from a steel coil welded into a round shape, so there are certain bead, continue to outward expansion stress, if not annealing, the pipe is used long might in weld there appear problem, if the annealing, the equivalent of the internal structure of the pipe to decompose restructuring, eliminates the stress, make each position pipe stress are consistent

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