Methods of Stress Relieving
(a) Heat the complete structure as a unit.
(b) Heat a complete section containing the weld or
welds to be stress relieved before attachment to other
sections of work.
(c) Heat a part of thework by slowly heating a circum-
ferential band containing the weld at the center. The
width of the band that is heated to the required tempera-
ture shall be at least 2 in. (51 mm) greater than the
width of the weld reinforcement. Care should be taken
to obtain a uniform temperature around the entire cir-
cumference of the pipe. The temperature shall diminish
gradually outward from the edges of this band.