Pressure Vessel for Human Occupancy

The American Society of Mechanical Engineers defines a Pressure Vessel for Human Occupancy (PVHO) as 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 ASME's PVHO committee has published standards governing the construction of a number of PVHO applications. The current design standard is PVHO-1-2023. The current code for maintenance and operation guidances is ASME PVHO-2-2019. Similar standards are published by a range of national and international standards organisations.

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