What is hatch cover shipping?
These covers roll to stow on the sides of a hatch (side-rolling) and are mainly used by bulk-carriers. The usual arrangement is for one panel to stow on the port side, while the other stows on the stbd side.
What is a hatch cover and what is the function and purpose of hatch cover?
The purpose and function of a hatch cover and its coamings is to prevent ingress of water into a cargo hold after a large opening has been cut in the deck for cargo access. Hatch covers are a moveable structure designed to a weathertight standard.
Which hatch cover is generally used for container ships?
Lift-away hatch covers for general cargo ships Multi-panel covers comprise several separate panels for each hatch opening. They are generally used for multi-purpose cargo ships carrying heavy cargo and usually have transverse joints.
What is the purpose of hatch cover inspection?
Testing the weather tightness of cargo hatch covers or doors. Testing seals in cargo access areas, such as bow, side and stern doors or any opening that needs to be sealed. Sealing integrity checks on large yachts. Testing watertight doors.
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.
What are the basic procedures in maintaining cargo hatch covers?
GENERAL MAINTENANCE AND ROUTINES
- Before closing the hatch covers, ensure that the hatch coamings and double drainage channels are swept clean of any cargo debris.
- Whilst cleaning, check for any damage to the coaming area, paying particular attention to the compression bars, wheels, wheel tracks and landing pads.
What is steel hatch in cargo ships?
Steel hatch covers, comprising a number of linked steel covers, are now fitted universally. Various designs exist for particular applications, but most offer simple and quick opening and closing, which speed up the cargo handling operation.
How many types of hatch covers are there?
Types Of Hatch Covers Rolling type can be divided into end rolling, side rolling, and piggyback & telescopic. Folding type hatch covers are basically used on general cargo ships. However, these may vary depending on the stowage space and the type of cargo that is carried.
How do you test a hatch cover?
What are the methods of testing hatch cover?
- Chalk testing. This is where chalk is placed around the perimeter and then the hatch sealed.
- Hose testing. Water is sprayed from a hose from 1-1.5 meters away from the cover joints to make a visual observation if there is any leakage.
- Ultrasonic testing.
How do you secure hatch cover?
Once opened, hatch covers should be secured properly, using the chain stoppers, chocks or other devices recommended by the manufacturers. Hatch openings should be well-illuminated and if there are guard rails and stanchions fitted, these need to be fixed into place.
What is wooden hatch cover?
Hatch covers are used to cover and protect the cargo in the cargo spaces. Hatch covers close off the hatch opening and makes it water tight. In the days of wooden ships, the hatch covers were made of wooden planks, beams and boards and were covered with tarpaulins.
Why is the hatch cover test important?
Ensuring a ship’s hatch covers are weathertight is an essential aspect of exercising due diligence to make a ship cargoworthy that may not be covered by routine classification society inspections. This requires an appropriate method of testing to enable any potential problems or defects to be identified and resolved.