when ship inclining to 15 degrees can opening and
closing, and should be in the operating room with that watertight door is open
or close on display device. The door should be open and close in place at each
side of the bulkhead. Watertight doors shall be from the control room in the
time of not less than 20s and 40s remote shutdown, and should be equipped with
different alarm device with other equipment. Sound alarms are maintained at least
5S, but not more than 10s,until door closed.
To prevent water when
ship's hull broken. The effectiveness of these arrangements is subject to a
number of factors, but it is necessary to ensure that any watertight doors on
the bulkhead be closed at the time of the rupture or in the case of an almost
immediately after rupture.
Weathertight door
structure Similar to
steel watertight door, but the door weight is slightly lighter, less wedge
handle and close packing press in shallow, which need to meet the corresponding
density test requirements to ensure in any storm impermeable; the use of wooden
door should also ensure its resistance to water wave impact. Generally used as
a freeboard deck room leading to open the cabin door and the furnace door,
storage room door, the pantry door and so on. That leads to the open air
kitchen, can be used to double leaf type door. When considering the appearance
of decoration, can use wooden door.
Fireproof
door
1, set up in the fire
resistance separation bulkhead, can achieve the same level of fire separation
requirements of the door.
2, installed in the
fire bulkhead on the ship, can be closed after the fire spread of the door.
Fireproof door is a
kind of steel plate made of door and door frame, and mosaic asbestos and other
refractory materials of fire prevention. Installed on the fire control area of
the bulkhead, normally open; when the fire occurs, the temperature rises to a
certain value the door can be closed automatically, or gate is arranged on the
pinned magnetic device, off the power door will automatically close. Fire doors
in the channel are required to be self closed, when the temperature exceeds 90
degrees can be automatically shut down to prevent the spread of fire.
Fireproof doors are
provided with fire protection equipment on fire resistant doors. It has an
equivalent fire separation effect with the bulkhead. Ship construction codes
are classified into Grade A, grade B and grade C. Fire resistance of class a
fire door is the highest
Install in the side
plates, the superstructure deck and outdoor wall , on the hull of the ship, can
ensure the hull tightness, Round window with anti storm performance.
Ship's portholes
reason are designed into round, according to the principle of mechanics,
circular than other shapes more under pressure, shear stress. The installation
position of porthole according to insubmersibility of ship.
Classify into heavy
and light type. Heavy porthole inboard hinge cover anti wave porthole.
Deadlights side with rubber seals, tightly pressed by the bolt to keep
watertight. Light portholes are generally not associated with deadlights. In
the spaces below the freeboard deck or enclosed superstructure premises
portholes were all severe side scuttle.
Location: a rectangular window is arranged in a second
level building, as square and rectangular window for light or ventilation.
Structure: inner side
open type, outside open type, inside open type, drop type and fixed type, etc.,
under pressure is less than 5m water column (the larger transparent size the
lower pressure resistant .)
Equipped with:
according to the size of the rib spacing, visual field, the need of light
The rectangular window is arranged on the wall of the
upper deck superstructure. rectangular window of the periphery with a rubber seal,
close with the bolt pressed the requirements to ensure weathertight.
Rectangular window
according to the size of the rib spacing with a suitable window, the other to
consider is water tight pressure. Transparent size 400mm x 300mm can bear 50Pa
pressure, 350mm x 50mm, 400mm x 550mm, 450mm x 600mm can be confined to 20Pa.
In the superstructure of the general compartment window, the large size of the
(550mm x 600mm, 600mm x 700mm, 800mm x 900mm) window is used to request a wide
driving room.
Manhole
Installed in the
manhole above, which has cover sealing performance and fixing accessories.
Classify into watertight, oiltight .Oiltight manhole cover with oil resistant
rubber, and watertight manhole cover with water resistance rubber.
In tanks, cofferdams
etc.cabin roof or wall that manhole manhole cover must be installed, and shall
ensure the watertightness. Each tank or empty cabin there are at least two
manhole, and a diagonal arrangement.
Manhole cover plate,
hoarding and seat usually adopt carbon steel hot rolled or with hull structure
of the manhole cover of the same material manufacture and installation, washer
and handle by ordinary carbon steel, sealing washers by flame retardant type
oil resistant or resistant to sea (fresh) water rubber, bolts or stud by
stainless steel or carbon steel, the nut of carbon steel, stainless steel or
brass material. Carbon steel bolts, studs, nuts and washers shall be
galvanized.
hatch cover,according to the requirements of tightness
classify into watertight hatch,oiltight hatch and nontight hatch.
In order to prevent the water into the cabin,
installed on the hatch wooden or steelcover, can also be used as deck cargo
supporting structure. Closure device for hatch cover should be weathertight;
The structural strength of all open deck hatch cover
should be adjacent to the strength of structure.Hatch cover main role
is to ensure that waves and rain donot invade the cargo hold, some hatch cover
also bear weight of cargo on deck.
small hatch cover installed in liquid cargo warehouse,
refrigerated cargo warehouse,,personnel access hatch and manhole
According to the transmission mode divided into
rolling hatchcover l, oblique type, sheathed type, roll shift including lateral
displacement type, cascade, roll roll type, hinge type including hinged flap,
folding and so on.
With tightness hatch
can devide into watertight, oiltight, airtight and nontight hatchcover etc.,
according to the different tightness that hatch cover plate and the adjacent
components are respectively equipped with layering, packing, gasket, pressing
device sealing apparatus.
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