Pressure Vessels for Human Occupancy – PVHO

ASME Setting The Standard Logo







Stanley Plastics Ltd manufacture all Acrylic Viewports to the current ASME PVHO Rules for Pressure Vessels For Human Occupancy (PVHO).

PVHO is a pressure vessel that encloses a human being within its pressure boundary while it is under internal or external pressure that exceeds a 2 psi differential pressure.  PVHOs include, but are not limited to, submersibles, diving bells, personnel transfer capsules, decompression chambers, recompression chambers, hyperbaric chambers, high altitude chambers, and medical hyperbaric oxygenation facilities.  This does not include nuclear reactor containments, pressurized airplane and aerospace vehicle cabins and caissons.

All of Stanley Plastics Ltd’s Acrylic Viewports are supplied complete with ASME PVHO Certification (excluding pressure test certification unless requested).

The ASME PVHO Standard provides requirements for the design, fabrication, inspection, testing, marking and stamping of pressure vessels for human occupancy, having an internal or external pressure differential exceeding 2 psi. This Standard also provides requirements for the design, fabrication, inspection, testing, cleaning, and certification of piping systems for PVHOs.