DQ Marine

Marine Equipment & Technical Supplies

TECHNICAL DATASHEET Issued 2026-08-21

DQ MARINE PRODUCT DATA

Type C Marine Manhole Covers for ship

Category
Manhole Cover
Origin
China
Type C 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-c-marine-manhole-covers-for-ship
Standard CB/T19-2001
Origin China

Technical Information

Type C marine manhole covers for ship:

This cover is used for watertight and oiltight manhole covers.

Standard: CB/T19-2001

Manhole Cover Type C is Marine Sunk Manhole Cover.And in GB11628-89, it is Type D.

Technical Data:

Type NOMINAL SIZE
mm 		L1 L2 L3 B1 B2 B3 S FASTENER WEIGHT
KG
mm DAI QUT
C 450X350 450 570 650 350 470 550 10 M20 16 116.6
12 121.6
14 128.6
600X400 600 720 800 400 520 600 10 20 136.1
12 142.2
14 149.5
800X600 800 920 1000 600 720 800 12 26 171.5
14 182.6
18 206.8
800X400
(ellipse) 		800 930 1010 400 530 610 12 24 102.8
14 118.2
18 146.2