What is a hatch cover?
3 min read
Asked by: Lisa Robbins
A watertight hatch cover is a cover designed to prevent the passage of water in either direction under a head of water for which the surrounding structure is designed. A weathertight cover is a cover designed to prevent the passage of water into the ship in any sea condition.
What is the purpose of the hatch cover?
The major objective of hatch covers and coamings on ships is to prevent the ingress of water into the cargo hold and protect the goods from being damped and damaged.
What are the 5 different types of hatch cover?
Types of hatch covers
- Lifting type.
- Rolling type.
- Folding type.
- Sliding-type.
- Roll stowing type.
What are ship hatches?
A cargo hatch or deck hatch or hatchway is type of door used on ships and boats to cover the opening to the cargo hold or other lower part of the ship.
What is steel hatch cover?
Hatch covers are used to close off the hatch opening and make it watertight. Wooden hatch covers, consisting of beams and boards over the opening and covered with tarpaulins, were once used but are no longer fitted. Steel hatch covers, comprising a number of linked steel covers, are now fitted universally.
How often is to be done on maintenance of the hatch cover?
Routine maintenance – three monthly
Once the permanent indentation reaches 70% of the designed compression the hatch cover is likely to leak. Do not grease the rubber packing or seals unless proceeding into cold wetaher when glycerine based grease can be used.
What should I do when I open my hatch cover?
Once opened, hatch covers should be secured properly, using the chain stoppers, chocks or other devices recommended by the manufacturers.
What is hatch cover in maritime?
A weathertight cover is a cover designed to prevent the passage of water into the ship in any sea condition. Hatch covers are constructed to be weathertight, which means that, in any transient condition, water will not penetrate into the ship through the covers.
What is a folding type hatch cover?
Folding hatch covers are designed to carry various deck cargoes and to form functional cargo areas to facilitate flexible cargo operations. In an open position they provide access to the hold for loading and discharging cargo and in the closed position they seal the hatchway in a weathertight manner.
What is single pull hatch cover?
One such type of hatch cover is a MacGregor, single pull hatch cover. In this type, the hatch cover moves on rollers attached to tracks fixed on the hatch coaming. The hatch cover is not one steel structure but a series of steel covers linked together by chains.
