O2 vs "Air"

Terminology is critical. Especially when using an acetylene torch. Oxygen should be referred to as an oxidizer or just O2. When you call it "air", it can be misinterpreted and used for tools that should never have pure oxygen plumbed into them. Such as a die grinder. The following image was from the VMMC that the Lincoln rep was passing around. The gentlemen who used this tool miraculously lived. Just because there is an attachment that looks slightly like an air compressor hook up does not mean it is just compressed air. In this case a custom attachment was made to plumb his die grinder into pure O2. The result was a bright flash of blue and temperatures that melted the tool. Always know what you are using and make sure you know the terminology.