The Definition of Hatch Cover

Located in upper deck (or between deck) of cargo tank, the Hatch Cover covers the cargo tank and has the following functions.

It prevents influx of seawater and storm water.
As cargo can be loaded on the cover, it increases the cargo load.
It prevents the cargo being carried away out of the cargo tank.

Hatch Cover Types

Hatch Cover TypesIt will vary according to the type and size of vessel ships and we are Manufacturing the Pontoon Type for Container Carriers and the Side Rolling Type for Bulk Carriers.

01. Pontoon Type

Hatch Cover has no opening function itself.

It is opened by crane, which is installed in harbor and lifts the cover up.As it requires the use of harbor cranes,

its cover has a weight limit and it is manufactured in the 30Ton~40Ton range.

02. Rolling Type

A Hatch Cover which is opened in line with the breadth of the ship is called a Side Rolling Type and that which is opened in line with the length of the ship is called an End Rolling Type. There are the Chain Drive method and Rack & Pinion method to drive the Hatch Cover.

03. The Rest

There is the Single Pull Type (contains the covers after connecting several separated covers with chains or connecting rods and keeps them upright) used for small & medium ships and the Folding Type (contains the covers after folding at least two covers and keeps them upright).

Characteristics of Manufacturing Hatch Covers

Precision is needed for Manufacturing

– Curvature (± 2mm)
– Horizontal level of Cover Top side (± 3mm)
– Horizontal level of Container Socket Top
(4ponit 중 3point ± 0, point ± 3mm)

The Hatch Cover requires its own production process line.

Hatch Cover Manufacturing Process