Pressure vessel for human occupancy
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A Pressure vessel for human occupancy is a container that is intended to be occupied by one or more persons at a pressure which differs from ambient by at least 2 pounds per square inch (0.14 bar). Since 1977, the American Society of Mechanical Engineers PVHO committee has published standards governing the construction of a number of structures which are defined as Pressure Vessels for Human Occupancy. The current standard is PVHO-1-2019. Similar standards are published by a range of national and international standards organisations.
List of PVHO types
- decompression chambers
- Closed diving bells, also known as dry bells or personnel transfer capsules
- High altitude chambers
- hyperbaric chambers
- hyperbaric stretchers
- medical hyperbaric oxygenation facilities
- recompression chambers
- submarines
- Manned submersibles
- Atmospheric diving suits
Nuclear reactor containments, aerospace cabins, caissons or mild hyperbaric chambers are not considered to be PVHOs according to the standard.