Manhole Cover
CB/T 4392-2014
USED FOR THE SHIP WATERTIGHT AND OIL TIGHT MANHOLE COVER.
Type and nominal size of manhole cover
| Type | Name | Nominal size |
| AA | Raised oval shape manhole cover | 450×350、500×400、600×400 600×450、800×600 |
| AB | Raised elliptic shape manhole cover | 800×400 |
| BA | Ring pad oval shape manhole cover | 450×350、500×400、600×400、 600×450、800×600 |
| BB | Ring pad elliptic shape manhole cover | 800×400 |
| BC | Ring pad square shape manhole cover | 600×600 |
| BD | Ring pad circular shape manhole cover | Φ450、Φ600 |
| CA | Flush oval shape manhole cover with coaming shield | 450×350、600×400、600×450 800×600 |
| CB | Flush elliptic shape manhole cover with coaming shield | 800×400 |
| CC | Flush oval shape manhole cover with flat shield | 450×350、600×400、600×450 800×600 |
| CD | Flush elliptic shape manhole cover with flat shield | 800×400 |
| DA | Flush oval shape manhole cover without shield | 450×350、600×400、600×450 800×600 |
| DB | Flush elliptic shape manhole cover without shield | 800×400 |
| EA | Hinge oval shape manhole cover | 450×350、500×400、600×400 600×450、800×600 |
| EB | Hinge elliptic shape manhole cover | 800×400 |
Hand Cover
Raised Manhole Cover
Ring Pad (Hinge) Manhole Cover
