Ozone-Friendly Does Not Mean Hazard-Free: Managing Refrigerant Change Safely

World Ozone Day: a practical workplace perspective

A replacement refrigerant promises lower environmental impact. The intention is good. The decision still requires engineering judgement.

World Ozone Day should encourage safer cooling choices while recognising that environmental improvement and operational safety must be assessed together.

UNEP identifies toxicity, flammability and operating pressure as important considerations when selecting alternatives to older refrigerants. Different alternatives present different hazards; those characteristics cannot be inferred from an “eco-friendly” label.

Evaluate the whole system

A refrigerant change can affect much more than the contents of a cylinder. Depending on the proposed change, the review may need to consider equipment design, materials, lubrication, controls, pressure ratings, ventilation, leak detection and servicing arrangements.

Existing equipment should not be assumed suitable for a replacement substance. Manufacturer approval and competent technical assessment are essential before any proposed conversion.

Where compatibility cannot be established, replacement equipment may be the appropriate option.

Apply management of change

A workplace refrigerant transition should pass through the organisation's management-of-change process.

Define the reason for the change, the proposed refrigerant, affected assets and foreseeable hazards. Identify required modifications, supporting documentation and the people who must approve the decision.

Review emergency arrangements as well. A substance with different hazards may require changes to detection, response procedures or responder training.

Check competence and tools

Experience with one refrigerant does not automatically establish competence with another. Before introducing a new system, verify that technicians understand its hazards and have suitable servicing and recovery equipment.

Operators also need relevant information: what an alarm means, how to report suspected problems and which actions are authorised.

For an offshore facility, assess the actual installation conditions and their interaction with surrounding operations. Space limitations, access and simultaneous activities belong in the review.

Verify before handover

Technical acceptance should confirm that the approved installation, protective measures, labels, documentation and training are in place. Any unresolved items need explicit control before operation.

Consider an illustrative cold-room replacement. Choosing a lower-impact refrigerant is only part of the project. The organisation must also demonstrate that the selected equipment, installation and servicing arrangements suit that refrigerant and location.

World Ozone Day offers a clear leadership challenge: approve environmental improvements with the same discipline applied to other plant changes.

Discussion question: Have we assessed the hazards introduced by the refrigerant we intend to adopt?