If you're not bright enough to do the math for correct mixture - you're existence isn't helping the human race as a whole.
As for sterilization - LOLOLOLOLOL - who sterilizes the air you breathe when you're outside or in your car?
I am bright enough to know what oxygen to use and it sure as hell is not welding grade. It isn't the oxygen that is sterilized it is the equipment and bottles dumb $hit. I don't bring crap into my house that some 15 an hour scum has handled. My lungs are crapped up by breathing a whole lot of crap I didn't have a choice to. As for not helping the human race,you can kiss my a$$. This forum is full of ignorant low lifes like yourself that never contribute anything useful. I have no doubt if you needed oxygen ,you would stick the cutting torch in your mouth and turn on the regulator.
