A heating apparatus for relieving residual Stress in a welded Joint between main and Branch Pipes.

摘要

Heating apparatus for relieving residual Stress in a welded Joint. (7) comprises a Coil induction heating Coil which comprises several sections (8, 9, 10, 11), electrically connected to one another through connectors (12), which has a Shape corresponding to the welded joint of main and Branch Pipes.These sections of the Coil are arranged so that the Electric current flows in the same direction in all of them, but some of these sections selected for having a Shape that fits all Pipe and main branches, including the Sun Board Given between them.