本标准规定了内部或外部压差超过2 psi的载人压力容器的设计、制造、检查、测试、标记和冲压要求。本标准还规定了PVHOs管道系统的设计、制造、检查、测试、清洁和认证要求。PVHO是一种压力容器，当其内部或外部压力超过2 psi的压差时，将人封闭在其压力边界内。PVHOs包括但不限于潜水器、潜水钟、人员转移舱、减压舱、再加压舱、高压舱、高空舱和医用高压氧设施。 这不包括核反应堆安全壳、加压飞机和航空航天器舱以及沉箱。

This 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. A 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.