| 摘要 |
A removable plug (30) for an internally threaded opening has particular application in a system for closing an opening (14) in the sidewall of a pipe (12). The system includes a nipple (16) having an inner end (18) attached, such as by welding, to a pipe (12), and an outer end (20) having internal threads (26). A short length externally threaded cylindrical plug body (30) is threadably positionable within the nipple (16) outer end (20), the plug body (32) having a recess in a top surface (38) thereof. An insert (34) is affixed within the plug body recess providing an operating space (74) within the recess below the insert (34), the insert being formed of a metal plate having a tool receiving central opening (58) therethrough and at least one integral tang portion (60, 62) extending downwardly into the plug body operating space (74), the insert (34) being secured, such as by welding to the plug body (32). The insert central opening (58) is shaped in a geometrical pattern, such as a square, to slidably and non-rotatably receive a plug engaging portion (94) of a driver (78) of matching cross-sectional configuration.
|
