Engineering Plant Guide
PRESSURE PLANT
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Pressurisation Units
- Description
- This type of plant is generally used in certain hot water systems. They may also be known as expansion vessels.
They are used to maintain a predetermined pressure in the system through the application of air/gas pressure that is separated from the water by a rubber membrane.
- Periodicity of Inspection
- 26 months
- Why Inspect It
- The main hazard with this type of plant is that the vessel may fail because its safe working pressure has been exceeded or because its ability to withstand pressure has been reduced through in-service degradation e.g. corrosion or fatigue.
