Pipe`s welding seam testing method for gas generator, involves inserting expansion device that is larger than inner diameter of pipes, so that device expands pipes below its yield point under formation of gap in flaw welded area

摘要

The method involves inserting an expansion device (18) in interior of pipes (10). The expansion device is larger than an inner diameter of the pipes, so that the expansion device expands the pipes below its yield point under the formation of a gap in a flaw welded area, where a longitudinal welding seam (14) is defective. The expansion device rests against an inner side (26) of the pipes by a pivotable rolling unit (24). An independent claim is also included for a device for implementing a method of testing a welding seam of a pipe.