| 摘要 |
PURPOSE:To facilitate the welding work and strongly weld with not less welding metals by projecting a convex curved surface part on the pipe penetration part of a mirror part and welding the open peripheral edge thereof and a pipe, in case of welding a pipe with its penetration to the mirror part in the spherical part of a container. CONSTITUTION:In case of fitting plural metal pipes 2 by welding with penetration in parallel each other to the whole face of the mirror part 1 formed on the spherical part of a metal container, the convex curved surface part 8 formed with a hollow spherical seat on the inner lining material 5 of the container is provided with projection at the position where the pipe 2 of the mirror part 1 is penetrated. The pipe 2 is welded at a weld zone 7 by penetrating the pipe 2 through this part 8. In this case, the centers O, Q of the mirror part 1 and convex curved surface part 8 are made optional and the angle alpha formed by the pipe 2 and convex curved surface 8 is not constant around the pipe 2 but the shape becomes simple. Or the curvature center Q of the convex curved surface is placed on the axial line of the pipe 2 or the cross point S of the axial line of the pipe 2 and the surface of the mirror part 1. In this way the welding of the mirror part 1 and pipe 2 becomes extremely easy.
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