4 Safe Refrigerant Handling
Learn how to assess refrigerant hazards, prevent releases, use protective equipment, and respond safely to leaks and exposure.
Recognize hazards
Refrigerants can injure workers through cold liquid contact, inhalation, , pressure release, or—in some cases—fire and decomposition hazards. The risks differ by , so identify the substance and consult its safety data sheet (SDS) and the equipment instructions before starting work. Follow applicable workplace procedures and regulations.
Prepare for safe service
Before servicing equipment, assess the , its hazards, the amount that could escape, the work area, and any ignition sources. Treat flammable refrigerants as an ignition hazard and follow their specific handling procedures.
Work in a well-ventilated area and use suitable mechanical ventilation when needed. Do not rely on smell to determine whether air is safe: can displace oxygen, particularly in enclosed or low-lying spaces.
Follow and equipment procedures to control energy and pressure. Recover with equipment approved for that and use a compatible, properly labeled . Never open a pressurized system or line until it has been safely isolated and depressurized.
Use sound hoses, fittings, and service connections. Inspect equipment for damage, connect and disconnect carefully, and use an appropriate or another approved leak-check method. Repair the cause of a leak rather than repeatedly adding .
Protect cylinders from physical damage and excessive heat, and handle and store them according to their labels and instructions. Do not mix refrigerants in a cylinder.
Select protective equipment
Choose using the SDS, task-specific risk assessment, and employer procedures. For routine service, appropriate eye protection and insulated gloves suitable for contact help protect against splashes and frostbite. Wear protective clothing that covers exposed skin when contact is possible. A face shield may be needed when there is a splash risk, but it should be worn with—not instead of—suitable eye protection.
does not replace ventilation, safe work methods, or appropriate emergency planning. Keep eyewash and emergency washing facilities accessible where liquid exposure is possible.
Respirators are not a substitute for ventilation or a way for untrained workers to enter a leak area. If a major release occurs or the atmosphere is unknown, leave the area and let trained, properly equipped responders assess it. An unknown release may create an immediately dangerous atmosphere, and an ordinary air-purifying respirator does not protect against oxygen deficiency.
Prevent and repair leaks
Inspection and careful work habits reduce exposure risk and emissions. Before use, inspect hoses, gauges, seals, valves, and cylinders; replace damaged or suspect components. Use the correct tools and fittings, and avoid cross-contamination between refrigerants.
Locate leaks with a detector or another suitable method; do not use an open flame. After repair, verify that the leak has been corrected before returning equipment to service. Record and report work as required by the employer and applicable rules.
If a detector indicates a leak at a service connection, stop work, isolate the equipment if safe, and ventilate as appropriate. Repair or replace the faulty connection, then verify the repair before proceeding.
Follow requirements
In the United States, EPA Section 608 prohibits intentionally venting covered refrigerants during equipment service, repair, or disposal. Certification, recovery, and leak-repair requirements depend on the equipment and . Check applicable EPA requirements and local rules before work.
Respond to leaks and exposure
For a suspected significant leak, warn others, leave the affected area, and call emergency services or the site emergency contact. Do not enter to rescue someone unless you are trained and equipped for that atmosphere. If the may be flammable, do not restart equipment or create sparks. Only trained responders should re-enter, after the atmosphere has been assessed and declared safe.
For inhalation, move the person to fresh air only if you can do so without entering a hazardous area. Call emergency services for serious symptoms or breathing difficulty. If the person is not breathing, begin appropriate resuscitation only if you are trained and it is safe to do so.
For skin contact with cold liquid, get medical help promptly. Do not rub the affected area or forcibly remove clothing frozen to the skin. For eye contact, treat the injury as urgent. If tissue is not frozen, flush with plenty of water and seek immediate medical attention. If eye tissue appears frozen, seek immediate medical attention rather than trying to thaw it yourself.
Follow the -specific SDS and directions from emergency professionals. First-aid instructions can vary with the substance and the injury.