When using air compressors to provide clean breathing air for respiratory protective equipment, workers need to be aware of potential carbon monoxide (CO) contamination risks, especially when powered by internal combustion engines.
Carbon monoxide, a colorless, tasteless, and odorless gas emitted by petrol and diesel engines, can pose severe health hazards. Inhaling CO prevents blood from carrying oxygen to vital organs, leading to symptoms like headaches, drowsiness, reduced judgment, and, in extreme cases, coma or death.
To manage the risk of carbon monoxide poisoning during air compressor use, the following measures should be considered:
Meet Air Quality Standards: Ensure that the air quality from compressors for supplied air respirators complies with AS/NZS 1715 standards. This includes acceptable levels of oxygen, carbon monoxide, carbon dioxide, stale air, and moisture.
Prevent Overheating: Take precautions to prevent air compressors from operating when overheated, as excessive heat can lead to breakdowns in oil lubricants, producing dangerous levels of carbon monoxide.
Monitoring and Alarming: Periodically test air quality using a continuously operating carbon monoxide monitor with an alarm, especially for oil-lubricated compressors. Install a high-temperature protection cutoff switch for added safety.
Contaminant-Free Intake: Position the air compressor intake away from potential contaminant sources, such as exhaust gases or areas where fumes may accumulate.
Respiratory Protection Program: Establish and maintain a comprehensive respiratory protection program, including information on managing air sources for air-supplied respirators.
Inspections and Maintenance: Conduct regular inspections and maintenance by a competent person to ensure equipment, including the compressor, is in safe operating condition. Fix identified issues promptly and follow the manufacturer's maintenance instructions.
Safe Work Procedures: Develop and implement written safe work procedures that provide workers with information about hazards, risks, and control measures related to using compressed air for breathing. This should cover the selection, use, and maintenance of respiratory protective equipment (RPE) and breathing air systems, as well as the use and maintenance of alarms and monitors.
By adhering to these measures, workers can minimize the risk of carbon monoxide exposure during air compressor use, contributing to a safer work environment.