Hi,

      From experience, somewhat in the past, there are welding methods that can be used on tubular, round or rectangular, which minimizes the distortion of the weldments.  This entails the sequence of when joints are welded, the amount of weld and direction of welds on joints and pausing to let joints to cool before proceeding to additional joint on the same weldment.

      Is there any type of formal training available for instruction in the type of practices mentioned in the previous paragraph?

Thanks,
Shanesox