| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe welding stand which can weld even a special shaped pipe, and perform the correct alignment and the welding with a simple structure. SOLUTION: The pipe welding stand in which pipes are butted to each other and a butted portion is welded has bars 12a, 12b to be inserted in the pipes to be welded, and an alignment member 15 which is passed through the bars 12a, 12b and moved along the longitudinal direction of the bars 12a, 12b, the alignment member 15 is fitted to inner circumferential surfaces of pipes 10, 11, 12 and the pipes are welded by using the pipe welding stand to concentrically align these pipes 10, 11, 12.
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