DQ Marine

Marine Equipment & Technical Supplies

TECHNICAL DATASHEET Issued 2026-08-21

DQ MARINE PRODUCT DATA

Type D Marine Manhole Covers for ship

Category
Manhole Cover
Origin
China
Type D Marine Manhole Covers for ship

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 type-d-marine-manhole-covers-for-ship
Standard CB/T19-2001
Material Carbon Steel Q235
Origin China

Technical Information

Type D marine manhole covers for ship:

This cover is used for watertight and oiltight manhole covers.

Manhole Cover Type D is Marine Sunk Manhole Cover.

Standard: CB/T19-2001

Material: Carbon Steel Q235

Technical Data:

TYPE NOMINAL SIZE L1 L2 L3 B1 B2 B3 S FASTENER WEIGHT
KG
mm DAI QUT
D 450X350 450 570 620 350 470 520 14 M20 16 73.1
16 81.6
18 90.2
600X400 600 720 770 400 520 570 14 20 83.6
16 88.8
18 94.8
800X600 800 920 970 600 720 770 14 26 108.4
18 120.6
20 149.8
800X400
(ellipse) 		800 930 980 400 530 580 14 24 89.4
16 102.5
18 127.8