| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piping joint for ensuring a breakage check of a seal member by inspecting the leakage of air. Ž<P>SOLUTION: The piping joint 40 includes a plate body 26 and a pipe body 28 welded and joined to each other with an O-ring 71 existing therebetween, wherein a primary seal part formed by the O-ring 71 and a secondary seal part formed by the plate body 26 and the pipe body 28 joined to each other comprise a double seal structure. An air vent passage 93 is provided for opening the secondary seal part. The air vent passage 93 includes an annular passage 79 formed between the plate body 26 and the pipe body 28, and a slit groove 89 for opening the annular passage 79 to the outside. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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