An atmospheric round manhole is a circular access point that is installed on the top or side of a tank or vessel, and is not designed to work under pressure, but at atmospheric pressure.
Application: Tanks without pressure or low pressure, inspection and cleaning.
Main features:
An atmospheric round manhole is a circular access point that is installed on the top or side of a tank or vessel, and is not designed to work under pressure, but at atmospheric pressure.
It is mainly used for internal tank inspection, cleaning and maintenance, personnel access (depending on the diameter) or reaching internal instruments or equipment.
Technical specifications of a round atmospheric manhole:
| Code | DN | OD (mm) | t (mm) | H (mm) | t1 (mm) | Pressure (bar) |
| 4333021 | 300 | 300 | 2.5 | 100 | 2 | 0-0.1 |
| 4333022 | 400 | 400 | 3 | 100 | 2/2.5 | 0-0.1 |
| 43330221 | 400 | 400 | 3 | 100 | 2/2.5 | 0-0.1 |
| 4333023 | 500 | 500 | 3 | 100 | 2/2.5 | 0-0.1 |
| 4333024 | 600 | 600 | 3/4 | 100 | 2/2.5 | 0-0.1 |
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