Oxygen compatibility, materials and explosions

[Celt]

You may want to review this:
https://www.dekra-process-safety.co...under-process-safety-conditions-datasheet.pdf

If you look at case number 5 using 100% oxygen the auto ignition dropped by only 35% in Small Bauer compressor the flash point of the lubricant would have to drop over 100% the running temperature would have to rise over 100%

 

[northernone]

Thing can go wrong but there’s risk with everything

Agreed. Rarer to drown while mountain climbing than diving... I suppose it comes down to which informed risks we are willing to tolerate and are prepared safeguard against.

For me, messing with oxygen around oil in a compressor isn't a risk I need in my life, it brings no joy to me and only increased chances kerboom based on the experiences of others.... An o2 clean booster on the other hand, I'm rather keen on because I like rebreathers. The reward is worth the risk in that case to me.

Are you fairly comfortable in your risk assessment? I'd be interested what hearing the various accounts of o2 related injuries and deaths in this thread has done for the way you consider your fills. If you were wanting to reduce your risk, what changes might you make?

Cameron

 

[Celt]

Agreed. Rarer to drown while mountain climbing than diving... I suppose it comes down to which informed risks we are willing to tolerate and are prepared safeguard against.

For me, messing with oxygen around oil in a compressor isn't a risk I need in my life, it brings no joy to me and only increased chances kerboom based on the experiences of others.... An o2 clean booster on the other hand, I'm rather keen on because I like rebreathers. The reward is worth the risk in that case to me.

Are you fairly comfortable in your risk assessment? I'd be interested what hearing the various accounts of o2 related injuries and deaths in this thread has done for the way you consider your fills. If you were wanting to reduce your risk, what changes might you make?

Cameron

Personally I won’t exceed a rate of 7ltr in 30 minuets to 200 bar and no one goes anywhere near my pump but me. I never take risks with other people. I fully understand dealing with the public changes everything.

 

[ajduplessis]

Mac: When you are dead, you dont know that you are dead. it is difficult only for others around you.

It is the same when you are stupid.

 

[Celt]

Mac: When you are dead, you dont know that you are dead. it is difficult only for others around you.

It is the same when you are stupid.

Maybe your stupid in believing everything you read and we’re all going to die

 

[rddvet]

Well you don’t know me and your attempt at labeling me as “ stupid and cheap “ is pathetic. But then the label suits the imbecile they only have to read it.

I don't know you, but I know what you've said. Your budget doesn't allow you to leave the little bit you can't scavenge out of an oxygen bottle. At most, what is that last 600psi- $45. But obviously you're doing technical diving because you're making a deco mix. So you can spend the money it takes to do tec diving, but the remaining oxygen is too costly on your budget? That means you're cheap.

Your comments on oxygen safety may not mean you're stupid, but you're stupid in your understanding of the subject.

So I stand by my statement.

 

[swimlikethefish]

 

[grf88]

If you look at case number 5 using 100% oxygen the auto ignition dropped by only 35% in Small Bauer compressor the flash point of the lubricant would have to drop over 100% the running temperature would have to rise over 100%

Case 5 was not carried out at elevated pressure. Still you appear to know more than anyone else and as such do not need to follow conventional wisdom. I am sure everything will be just fine until it is not.

 

[grf88]

When your compressor does finally explode it would be helpful if you, or your next of kin, could post pictures of it together with the subsequent fire damage and any associated injuries so others of a like mind could understand the dangers associated with such activities and could thus be discouraged more easily than you appear to be.

 

[Wookie]

Actually there’s a very simple reason for sending it through the compressor, when the pressure in the j bottle drops to low to decant you can use all of the remaining gas and I don’t have the budget of the military or industry, Alao oil can’t ignite til it reaches a flash point and compressors are designed to run at less than a third of that.

Dunno what kind of compressor you’re running, but most diester and triester oils have a flashpoint of 800f or so. I haven’t come across many that run much below 500f or so, on the 4th stage head.