| 摘要 |
An improved fitting assembly (l0) to be mounted in a coupling (11) embedded in a partition means (100) for connecting fluid carrying pipes (33,35) to the opposed open ends of the fitting assembly, is described. The fitting assembly is comprised of a tubular, nonflammable fitting conduit (21) that has an annular enlarged portion (23) on the outside sidewall (21A) of the conduit. The enlarged portion has an annular recess (27) that provides for mounting an annular, plastic gasket (25). The gasket is bonded in the recess and when the fitting conduit is mounted inside the coupling, the enlarged portion and gasket are in contact with the inside wall (13A) of the coupling. The gasket is then bonded to the coupling, which is plastic, to form a seal between the fitting assembly and the coupling. The contact point between the fitting assembly and the coupling is adjustable along the length of the coupling. The seal prevents the spread of smoke and fire between floors or the like in a building. |
