Guage

Coming from a medical environment, where the dangers of combining grease and high-pressure oxygen are well known, I can only agree. However, I have to point out that grease is used on none of our gas connectors, so why is it used anywhere else?

Because just one explosion can ruin your whole day.

I totally agree with fredski no boom is a good boom

We once had a guy who mistakenly connected a pneumatic jack hammer to an oxygen line. It was quite a spectacular explosion. Luckily he already had kids because he is not gonna make any more.

Sir,

Look up the difference in explosive limits for a chemical in air (21% oxygen) and in 100% oxygen. This was the cause of a deadly fire in an astronaut training exercise in the past. Although only a modest number of chemicals will spontaneously burn in the presence of pure oxygen at atmospheric pressure, when you start to increase the pressure of the oxygen, you reach a point where any hydrocarbon will react (burn) at room temperature. At this point you have an explosion. For each hydrocarbon chemical, this pressure can be different. For safety, therefore, you simply prohibit the use of equipment on oxygen service unless it has been cleaned or manufactured specifically for that service.

--JMM