Norwegian standard for medium-duty marine manhole covers. Offering enhanced durability and sealing performance in moderate to harsh maritime conditions.
| Nominal Size | L x H x Radius | Weight |
|---|---|---|
| 450 x 350 | 600 x 500 x 200 | / |
| 600 x 400 | 750 x 550 x 275 | 58 |
| 700 x 500 | 850 x 650 x 325 | 75 |