| 摘要 |
PURPOSE: An assembly method of a joint flange into a pipe is provided to prevent a gap between contacted faces while connecting a joint flange with a pipe, to have an excellent closeness. CONSTITUTION: An assembly method of a joint flange into a pipe has the steps of:inserting and fixing a pipe(12) into a pipe insertion hole(10a) of a joint flange(10); the 1st expanding pipe(12) where the pipe insertion hole(10a) of the joint flange(10) where the pipe is inserted and the pipe(12) is contacted; the 2nd expanding pipe(12) outside separated at a specific interval of the 1st expanded pipe(12).
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