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ASME PVHO-1-2023

Safety Standard for Pressure Vessels for Human Occupancy
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ASME PVHO-1-2023

Safety Standard for Pressure Vessels for Human Occupancy

PUBLISH DATE 2023
PAGES 73
ASME PVHO-1-2023

Purpose of ASME PVHO-1-2023

ASME PVHO-1-2023, titled Safety Standard for Pressure Vessels for Human Occupancy, is a standard developed and published by the American Society of Mechanical Engineers (ASME). Its primary purpose is to establish minimum requirements for the design, fabrication, inspection, testing, and certification of pressure vessels intended for human occupancy (PVHOs), such as hyperbaric chambers, diving bells, and decompression chambers. The standard aims to ensure safety, structural integrity, and reliability for occupants under high-pressure conditions, protecting against risks like structural failure, gas leaks, or oxygen toxicity. It provides guidelines for materials, welding, viewports, and life-support systems to meet stringent safety and performance criteria in medical, diving, and research applications.

Typical Use

ASME PVHO-1-2023 is typically applied in the design, construction, operation, and maintenance of pressure vessels used for human occupancy in various settings, including medical facilities, underwater operations, and scientific research. Common applications include:

  • Hyperbaric oxygen therapy (HBOT) chambers: Used in hospitals and clinics for treating conditions like decompression sickness, wound healing, or carbon monoxide poisoning.
  • Submersible diving systems: Such as diving bells or lockout chambers for commercial and research diving.
  • Decompression chambers: For divers recovering from deep-sea operations.
  • Research and simulation chambers: Used in aerospace or high-altitude studies requiring controlled pressure environments.

Engineers, manufacturers, inspectors, and operators use the standard during project phases to:

  • Select materials and components (e.g., pressure hulls, acrylic viewports, and piping systems) suitable for high-pressure and corrosive environments.
  • Design and calculate structural integrity, including stress analysis for pressure boundaries and fatigue resistance.
  • Specify fabrication and welding procedures, ensuring compliance with non-destructive examination (NDE) methods like ultrasonic testing or radiography.
  • Conduct hydrostatic and operational testing to verify pressure containment and life-support system functionality before use.

The standard is often referenced in conjunction with other codes, such as ASME Boiler and Pressure Vessel Code (BPVC) Section VIII for pressure vessel design or U.S. Coast Guard regulations for marine applications. It is widely adopted by regulatory bodies, certification agencies, and facility operators to ensure compliance with safety standards. The 2023 edition includes updates such as revised viewport design criteria, updated material specifications, and enhanced requirements for life-support systems, reflecting advancements in hyperbaric technology and safety practices.

SDO ASME: American Society of Mechanical Engineers
Document Number PVHO-1
Publication Date Dec. 11, 2023
Language en - English
Page Count 73
Revision Level
Supercedes
Committee
Publish Date Document Id Type View
Dec. 11, 2023 ASME PVHO-1-2023 Revision