| 摘要 |
<p>PROBLEM TO BE SOLVED: To give antiseismic performance to a flange joint for joining piping materials with a pipe body after holding unbalanced force inside of the pipe. SOLUTION: This invention is concerned with a telescopic release prevention pipe joint for joining a collar 21 one end of which is joined with a gate valve 13 through a flange joint 22, and the other end of the collar 21 with a pipe body 12, and the aforesaid release prevention pipe joint is provided with a locking ring 31 and a circular projection 32, which are related with each other, and with a push button 35 preventing the occurrence of telescopic motions in the release prevention pipe joint by unbalanced force taking place in the inside of the pipe, which is caused by a fact that the pipe is screwed out of the collar side so as to allow the pipe body 12 to be pressed.</p> |
