watertight doors
In the form of watertight door has hinge and sliding type.
Use on ships watertight door has the following three grade:
Grade 1 -- hinged door; Grade 2 -- manual sliding door; Grade 3 -- power and hand sliding door.
(1) hinged watertight doors: requirements can quickly open and close the door on both sides.
(2) sliding watertight doors: made of steel plate. According to the direction of sliding, has horizontal and vertical motion, according to the control mode, has manual operation and dynamic control. (Manual closing time is no more than 90 seconds. Dynamic closing time is no more than 60 seconds.)
The ship all watertight doors on the voyage shall be kept closed, due to work needs during the voyage must be opened, make sure it can be closed at any time. Watertight bulkhead watertight doors, whether power controlled or manually operated, where on the voyage must daily operation, inspected regularly at least once a week.
weathertight doors
2.weathertight doors
From above the freeboard deck enclosed superstructure wall of both ends entrance requirement installed weathertight door.
(1) steel weathertight
The structure with steel hinged watertight doors are similar, but door plate is thin, handle number of doors are less, sealing property worse, only to ensure tightness wind and rain.
(2) aluminum weathertight
It is divided into two types, the hinge type and the sliding type, tightness is poor.
3, fireproof door
Fireproof door that door plate and door frame made of steel plate, and mosaic of asbestos and other refractory material of fire insulation. Installed on the fire control area bulkhead, normally open; when fire occurs, the temperature rises to a certain value that the door can be closed automatically, or gate is arranged on the pinned magnetic device, off power door will automatically shut down. According to the water tightness of opening cabin, the fire door is divided into watertight type and non-watertight type. Fire door open and close type also has Hinged and sliding type.
