Compressed gases play a vital role in modern food freezing and chilling applications thanks to their ability to achieve extremely low temperatures rapidly. This quick freezing process helps preserve food quality, texture, and nutritional value—making these gases essential across a wide range of food processing operations.
In May 2025, the Compressed Gas Association (CGA) published CGA P-95, Guideline for the Safe Installation and Use of Cryogenic Food Freezing and Chilling Equipment. This new, harmonized guideline provides detailed recommendations to support the safe and effective use of refrigerated liquefied gases in food applications.
The document outlines critical safety requirements, best practices, and procedures for the installation, operation, and maintenance of cryogenic food freezing and chilling systems. It also highlights the unique risks associated with these gases and how to mitigate them.
Key hazards addressed in CGA P-95 include:
- Asphyxiation risk due to oxygen displacement in confined areas
- Elevated carbon dioxide concentrations, which can lead to impaired judgment, labored breathing, severe headaches, and other health effects
- Pressure buildup from evaporation or sublimation in confined spaces, potentially leading to leaks or equipment failure
- Cold temperature hazards, including frostbite or cold burns from improper contact with cryogenic materials or uninsulated surfaces
The guideline includes sections on:
- System overviews
- Refrigerated liquefied gas and personnel safety
- Storage tank and pipeline requirements
- Food freezing and chilling equipment specifications
- Installation practices
- Operating company responsibilities and safe ongoing operations
CGA P-95 is now available for download: