Compressed gas in solution is a non-liquefied compressed gas that is dissolved in a solvent. Many gases have flammable, toxic, corrosive, oxidizing, pyrophoric and other hazardous properties that can cause property damage, severe injuries or even death if proper safety precautions are not followed.

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According to OSHA Hazard Communication Standard: “ Compressed gas ” means: A liquid having a vapor pressure exceeding 40 psi at 100 deg. F (37.8 deg. C) as determined by ASTM D-323-72. Compressed gases can be toxic, flammable, oxidizing, corrosive, or inert.

Overview Hazards associated with compressed gases include oxygen displacement, fires, explosions, and toxic gas exposures, as well as the physical hazards associated with high pressure systems. Special storage, use, and handling precautions are necessary in order to control these hazards.

The content of this suborder was derived primarily from applicable Compressed Gas 21 Association (CGA P-1) and National Fire Protection Association (NFPA) Codes/Standards 22 (NFPA 45, NFPA 55, NFPA 70, and NFPA 704).

Compressed gas storage areas should be identified using proper signage and located away from sources of excess heat, open flame or ignition, and electrical circuits. They should not be located in enclosed or subsurface areas. Outdoor storage areas should be above grade, dry and protected from the weather.

The OSHA Hazard Communication Standard defines a compressed gas as: A liquid having a vapor pressure exceeding 40 psi at 100 deg. F (37.8 deg. C) as determined by ASTM D-323-72. Compressed gases can be toxic, flammable, oxidizing, corrosive or inert.

Compressed gas and equipment is addressed in specific OSHA standards for general industry, maritime, and construction. This section highlights OSHA standards and documents related to compressed gas and equipment.

Compressed natural gas (CNG) is a fuel gas mainly composed of methane (CH 4), compressed to less than 1% of the volume it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 20–25 megapascals (2,900–3,600 psi; 200–250 bar), usually in cylindrical or spherical shapes.

This document explains the hazards associated with compressed gas cylinders and how to eliminate injuries or property damage by providing guidance on hazard identification, safe handling, storage, labeling requirements, engineering controls, and required personal protective equipment (PPE).