REMOVABLE HATCH COVER FOR AN INTERNAL FLOATING ROOF MANWAY

摘要

A hatch cover (50) for deployment over a hatchway (46) formed in a floating roof liquid storage tank (10) has two base plates (52, 54) movably connected at a hinge (56, 58) and each defining complementary recesses (60, 62). A circular flange (64, 66) extends from the bottom surfaces of the base plates to seat the hatch cover in the hatchway. Two door panels (68, 70) are movably connected at hinges (72, 74) to the top surfaces of the base plates (52, 54). When one or both of the door panels are opened, equipment may be loaded into the tank through the complementary recesses. When closed, the door panels cover the recesses in the base plates. Complementary notches (76, 78) in the door panels provide an opening through which equipment tubing or wiring may extend when the door panels are closed.