Installation and
Maintenance of Marine Hatch


1. Small
hatch covers are generally outfitting standard parts, which are square.
Therefore, square openings at four corners are usually opened on the deck, and
a circle of anti-abrasion round steel is welded. A circle of coaming is
provided, and the small hatch is installed on the edge of the coaming.

2. Usually
dry cargo tanks or storage tanks can be provided with small hatches with screw
clips or wedge handles, and equipped with padlocks, and oil tanks should be
provided with special oil tank covers. The small hatch cover installed at the
entrance and exit of the internal emergency escape route on the weather deck
shall be a small hatch cover that can be opened and closed on both sides, and
shall be provided with a central rotating handle clip and a quick opening and
closing small hatch with a spring hinge Cover is appropriate.

3. For the
small hatch cover installed on the weather deck in front of the superstructure
or deckhouse, the cover shall be opened and closed in the direction of the bow;
the small hatch cover installed near the bulkhead (or co There should be enough
space between the wall) or the stiffener and the insulation to ensure that
after the cover plate is fully opened, the wing nuts and bolts of the screw
clamp can be laid down smoothly without touching the bulkhead.

4. When an inclined ladder is
required under the hatch cover, the opening size of the hatch shall ensure that
there is sufficient space for personnel to go up and down the inclined ladder.
When a straight ladder needs to be installed under the hatch cover, it is only
used as an entrance and exit for personnel, and the hatch opening should be
positioned so that the straight ladder can be within the range of the through

5. When the upper and lower decks or platforms are
provided with small hatches for personnel access, the positions of these two
small hatches should be staggered, otherwise it is not safe, and it will affect
the installation of the straight ladder and the opening of the hatch cover.
close. If it is specially used for articles to enter and exit, and small
hatches need to be installed on the same position on the upper and lower decks
or platforms, no straight ladders should be installed.


repairing, open and close the hatch several times to find out the cause of the
failure according to the hatch cover when it is switched on and off, and find
the right medicine according to the performance of the hatch cover when it is
switched on and off.

1. The watertightness of the ship’s hatch cover directly
affects the use effect of the ship’s hatch cover, which can directly reflect
the water pressure bearing capacity of the ship in the water and its own
performance. Once the watertightness device is deformed or damaged, it will
directly affect the ship’s cabin. Due to the performance of the cover, the
normal function of the ship’s watertight device cannot be fully exerted.

2. All seals should be in good condition. The overall
length should be replaced when replacing or renewing. Partial lengths of seals
must not be repaired and no gaps may exist.

3. Hatch cover strips should have a uniform surface and
be free from damage and severe deformation

4. Hatch cover grooved seals should be free of corrosion,
damage and deformation.

5. Calibrate the position of the cargo hatch cover.

6. Wheels, rollers, hinges and other operating parts and
mechanisms shall be in full serviceable condition, free from rust, damage and
deformation, properly adjusted and well oiled.

7. Hatches and coamings should be
free of holes, cracks, unsealed gaps or serious damage.

8. When replacing the manhole
cover, the manhole gasket should be clean and free of debris and dirt that
could cause leakage. Also, check all manhole covers to make sure they are
evenly seated.