Abstract: Flexible bushing for supporting a pipe conduit on each side of a wall having an opening for receiving the bushing. The bushing includes an inner component forming a pipe portion adapted for mounting the pipe conduits coaxially thereof, an outer fastening component secured in gas-tight fashion to the wall at the opening and an annular rubber element forming a gas-tight connection between the inner and outer components. Annular protective flanges are associated with either the inner or outer component and under normal temperature conditions define an open slot between the inner and outer components and the annular rubber element. A barrier creator borders the slot and is adapted to be activated by the action of heat to close off the slot in a flame-protecting and, preferably, gas-tight manner.

Abstract: Drop line devices for the supply of fluid cargo to the bottom of a tank, especially in combination with cargo circulation units comprising pump means for driving the cargo from and back to the tank. The devices comprise a conduit for arrangement substantially vertically in the tank. The upper end of the conduit is for connection to a pressure source of the cargo. The lower end is connected to a discharge head formed with stationary guide surfaces adapted to direct the outflow of cargo over a predetermined angle in a plane along the bottom of the tank.