(a) This Standard provides technical requirements and guidelines for the operation and maintenance of PVHOs and PVHO systems that were designed, constructed,tested, and certified in accordance with ASME PVHO-1,Safety Standard for Pressure Vessels for Human Occu-pancy.
(b) This Standard provides technical criteria for the user to establish the serviceability of a PVHO acrylic window under its specific environmental service condi-tions. Windows in protected environments as well as those in severe environments are addressed. Judicious use of this Standard will allow the user and/or the juris-dictional authority to determine when a PVHO acrylic window requires replacement.
