DQ Marine

Marine Equipment & Technical Supplies

TECHNICAL DATASHEET Issued 2026-08-21

DQ MARINE PRODUCT DATA

Marine Flush Manhole Cover

Category
Manhole Cover
Origin
China
Marine Flush Manhole Cover

Product Overview

DQ Marine supplies marine equipment and technical products for shipyards, vessel operators, offshore projects and industrial buyers worldwide.

Key Specifications

Category Manhole Cover
Model / SKU marine-flush-manhole-cover
Standard CB/T19-2001
Origin China

Technical Information

Marine Flush 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.

Main Material:

Cover: Carbon Steel

Coaming: Carbon Steel

Seal Ring: NBR

Bolt, Nut, Washer: Stainless Steel, Caron Steel , Copper

Main Size List(mm):
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

Other shapes and sizes, pls supply the drawing.