| 摘要 |
<p>A pipe fitting (10) comprising a hollow body (11) and at least one open end (12) for connection to another pipe fitting (100), said end (12) being pre-formed with internal screw threads (13). The end (12) includes an integral extension collar (14) which has an inner diameter relatively larger than that of the screw threads (13) for surrounding unused trailing screw threads (120A) of the other pipe fitting (100) and forming an annular gap (15) there between to hold a sealing compound (X). The collar (14) has a wall of a comparable thickness as that of the end (12) behind it and an outer diameter relatively larger than that of the end (12) behind it. <IMAGE></p> |
