| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a new bolt-type coupling system with an enlarged range of operation pressure without requiring increase in thickness of a pipe wall, and securing water-proof quality at a connection part to a certain limited angle between joined sections. Ž<P>SOLUTION: In the bolt-type coupling system, a contact area of a blockade element 6 and a support element 7 is between parallel, or almost parallel two surfaces, which enables a connection part to accept larger operation pressure. The support element 7 is formed by a method in which processing is applied after applying a weld bead, a method in which a back-up ring is used for arrangement of the weld bead, and a method of integral manufacture by casting. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
