What is pontoon hatch cover?

Asked by: James Maza

PMT delivers lift-away (pontoon) hatch covers that enables vessel operators to carry deck cargo and project cargo on their hatch covers. These hatch covers are designed double skinned to have minimum stacking height and easy maintenance.

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 is the 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.

What is sliding hatch cover?

The sliding hatch covers for tween decks can be fitted on both general cargo ships and in refrigerated cargo ships, especially where the decks are non-insulated. The panels slide, one under the other, as the hatch opens and they stow slightly sloping.

What are the 5 different types of hatch cover?

Hatch Cover Types

• Pontoon and tarpaulin.
• direct pull.
• folding hatch cover.
• Folding Covers.
• Roll Stowing Covers.
• Side and Rolling Covers.
• Lift and Roll Covers.
• Sliding Tweendeck covers.

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 single pull hatch cover?

The single pull hatch cover (Figure 13.12) consists of a number of transverse panels which span the hatchway and are linked together by chains. In the closed position, the panel sides sit firmly on a horizontal steel bar attached to the top of the hatch coaming.

What is piggy back hatch cover?

PIGGY-BACK HATCH COVERS The piggy-back hatch cover system enables every part of the hatch opening to be exposed roll movement of the cover panels. In operation, one panel is horizontally lifted by hydraulic jacks, enabling the other panel to be driven beneath it by built- in electric motors.

How do you secure hatch covers?

Never open hatch covers at sea unless absolutely necessary. Then, always secure by lowering wheels into guide pockets and/or attaching wires, particularly if side-rolling type. Do not tighten cleats so that the panels are unable to move on the coaming.