Purpose: for closing openings in decks and bulkheads of the outer contour and internal structures of the vessel and watercrafts.
Types: converging hatch cover; skylight cover.
Types: I-splash-tight; II-water-gas-tight; intrinsically safe.
According to the degree of fire protection and resistance to smoke and flame penetration: without degree; fire-resistant class A-0, A-15, A-30; A-60; fire retardant type B-0; B-15; B-30.
Types depending on the closing of similar manhole covers:
II E- locking from outside and inside: with individual wedge, lever wedge locking;
II F- outside with wing bolts;
II F- for closing openings in decks in areas 1. 2;
II F- for closing hatches of small size, in the bow of the ship.
II G - closing from the inside with a handle (handwheel), from the outside with a key or handle (handwheel);
Types of skylight covers:
Type A - closing with wing bolts. Type B - by wedge closures.
Method of fastening: welding. Basic material: aluminium
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