Inert gas asphyxiation hazard
Inert gas suffocation risk arises from the displacement of oxygen in confined spaces by heavy shielding gases like argon or carbon dioxide. This can lead to oxygen deficiency, blocking airways and causing severe breathing suffocation.
Physicochemical mechanism of action
Heavy shielding gases like argon or carbon dioxide are denser than air. They displace the room air by collecting in the lower areas of the space. This leads to oxygen deficiency, as oxygen is removed from the room and no longer reaches the airways.
Metallurgical relevance & welding risks
Inert gas suffocation hazard is especially dangerous in confined spaces or in containers where the air supply is limited. Oxygen deficiency can lead to severe breathing suffocation and serious health issues or even fatal consequences. Moreover, a lack of oxygen can impair weld quality, as the metal does not oxidize properly and strength is reduced.
Workshop practice & action instructions
To avoid inert gas suffocation hazard, continuous gas measurements must be carried out. The oxygen concentration should always remain above 19.5%. Respiratory protection measures such as using breathing masks or ventilation systems are essential. In confined spaces, fans should be used to ensure air supply. If oxygen deficiency is suspected, consider providing supplemental oxygen immediately.