PIPING COMPRISING MULTI-DRILLED PIPE AND A PLURALITY OF BRANCH PIPES, ITS CONNECTING STRUCTURE, PROCESSING METHOD, AND BRANCH PIPE FORMING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a connecting structure of piping capable of positively and easily connecting a plurality of branch pipes to an end of a multi-drilled pipe whose inside is divided into a plurality of communication holes.;SOLUTION: The multi-drilled pipe 1 is divided into the plurality of communication holes 4 by partitioning walls 3. The multi-drilled pipe 1 has an enlarged diameter part 11 at an end. The center of each of the branch pipes 10 is offset by press working with respect to an opening part of the multi-drilled pipe 1. Thereby, when each of the branch pipes 10 is inserted into the communication holes 4 of the end of the multi-drilled pipe 1, because the centers of the branch pipes 10 are offset with respect to the opening part of each of the communication holes 4, a comparatively large space can be formed between each of the branch pipes 10, and a brazing material layer 14 can be placed on the entire periphery of each of the branch pipes 10.;COPYRIGHT: (C)2007,JPO&INPIT