Marine Flat Manhole Cover:
Standard: CB/T19-2001
Marine Manhole Cover is used for manhole on the oil tanks, water tanks, voil tanks and other tanks on various shipes. It is fixed on the falt positions on the hold bottom, deck and bulkhead.There are Type A,B,C & D. The shape can be round, oval, square.
Technical data:
Model Nominal Size L L1 L2 B B1 B2 S Bolt Weight LxB Diamter Quantity kgs B1 450x350 450 470 570 350 370 470 4 M20 16 28.9 6 33.8 8 37.2 10 41.2 600x400 600 630 720 400 420 520 8 20 49.5 10 55.6 12 61.2 14 67.6 800x600 800 820 920 600 620 720 12 26 67.2 14 75.2 16 82.8 18 89.9 B2 800x400 (Oval) 800 830 930 400 430 530 12 24 56.8 14 63.2 16 69.2 18 76.2