Are you compliant to breathing air quality standards?

BS EN 12021 states: ‘Compressed air for breathing apparatus shall not contain any contaminants at a concentration which can cause toxic or harmful effects. In any event all contaminants shall be kept to as low a level as possible and shall be far below the national exposure limit.

How often is breathing air testing required?

Changes in the compressor and filter performance can happen rapidly. For this reason, the HSE require that the test be at least every three months. For rarely used equipment they require compressed air quality testing before each use. Employers must store the records of these tests and repairs for a period of at least five years.

BS EN 12021:2014 Limits

The purpose of the test is to make sure that the control measures put in place by the employer, such as inline filters, are delivering the air quality required by BS EN 12021:2014.  In summary, BS EN 12021:2014 sets these limits for the breathing air testing:

  • Oxygen must be at 21% ± 1%.
  • Carbon monoxide must be as low as possible and must not exceed 5 ppm.
  • Carbon dioxide must not exceed 500 ppm.
  • Oil mist and vapour must not exceed 0.5 mgm-3
  • Odour/taste – Without significant odour or taste.
  • Water (liquid) – 290 mgm-3 at 5 bar and 20oC.

In addition, the compressed air quality testing must show a dew point low enough to prevent condensation and freezing. In particular, the dew point of the air must be at least 5oC below the lowest temperature that the operators use and store the equipment. Furthermore, the pressure dew point must not exceed -11oC where the conditions of usage and storage are unknown.

Whatever your needs, our team are happy to guide you through whatever your industry requirements are and will provide the most suitable solution for you and your business.

COSHH regulations require a minimum interval of three months between tests of breathing air systems, while BSEN 12021 stipulates minimum quality standards for breathable compressed air, covering levels of oxygen, carbon monoxide, carbon dioxide, lubricants, water, other types of contaminants and odour 

We can provide a worry-free programme for a certified breathing air testing service, carried out by our trained engineers

After testing the air quality of your breathing air, we will provide a certificate of testing.

We offer a wide range of products and can recommend the appropriate correction measures if the air quality fails to meet current legislation. 

Future appointments will be scheduled to ensure a continued compliance with legislation, allowing you to control and monitor the condition of your air

We measure at each test point the following.

Contents of CO (carbon monoxide ppm) in breathing compressed air.

Contents of CO2 (carbon dioxide ppm) in breathing compressed air.

Contents of H2O (Water) in breathing compressed air.

Contents of Oil carryover in breathing compressed air.

Pressure, temperature and flow of compressed air.

Contents of Oxygen in breathing compressed air.