Familiarise with High Pressure Terminology

Compressor Dictionary - B

Breathing Air Quality Norms

In Germany, quality norms for breathing air are laid down in the DIN EN 12021 (former DIN 3188) norm, which specifies minimum levels of purity.

Purity is measured with respect to:

noxious gases, such as
       - vapours
       - suspended particles

Maximum level of carbon monoxide (CO):

≤ 30 ml/m³ at 1 bar absolute (stricter norms apply for dive depths beyond 50 metres)

Maximum level of carbon dioxide (CO2):

≤  800 ml/m³ at 1 bar absolute (stricter norms apply for dive depths beyond 50 metres)

Maximum water residue:

Water content at 200 bar: max. 50 mg/m³ at 1 bar absolute
 Water content at 300 bar: max. 35 mg/m³ at 1 bar absolute

This air quality norm is geared towards divers and commercial breathing air applications.

Documentation on the DIN air quality norms can be obtained from:

Beuth-Vertriebsgesellschaft
Burggrafenstr. 4-10
10787 Berlin / Germany
Tel. +49 (0) 30 26010

Refer also to the entry on » "rules for the installation and operation of filling stations".

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