Oxygen compatibility, materials and explosions

[Celt]

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.

Bauer 3.5 cfm

 

[Marie13]

second hand - My instructor's buddy, needing to feather a valve for deco due to a failure, had the reg light up killing him....

Underwater? :O

 

[aquacat8]

Freediving is sounding really safe right now

 

[Marie13]

Freediving is sounding really safe right now

Doesn’t 40% or less nitrox reduce the worry about the O2 issues?

 

[aquacat8]

Does it?

 

[swimlikethefish]

Doesn’t 40% or less nitrox reduce the worry about the O2 issues?

1. Someone still has to make the 40%.
2. You still have to get a tank fill.

It would depend on a partial pressure blend or a bank fill. Either way someone still has to make the initial blend. Unless they were using a membrane they would be blending 100% with air to get your 40%.

 

[Marie13]

1. Someone still has to make the 40%.
2. You still have to get a tank fill.

It would depend on a partial pressure blend or a bank fill. Either way someone still has to make the initial blend. Unless they were using a membrane they would be blending 100% with air to get your 40%.

I was actually referring to the concern about having filled tanks at home or in the car. Or the issues caused by higher O2 content gas, such as the reg killing the diver who had to feather a deco bottle.

 

[tarponchik]

The funny thing is, last year when analyzers were discussed, everyone was telling me how safe it is to keep and use an oxygen tank. Makes me wonder why did the Collective Mind change its mind? Maybe, saw something scary in the news?

 

[Wookie]

Keeping and using an oxygen cylinder designed for oxygen service is fine and safe.

 

[tarponchik]

Keeping and using an oxygen cylinder designed for oxygen service is fine and safe.

Sure. If the keeper-user is properly trained, why not? But here is some useful reading for you on safety of medical home oxygene:

...US data that are available online from the Consumer Product Safety Commission's National Electronic Injury Surveillance System (2003–2006) shows that home medical oxygen was involved in an average of 1190 thermal burns seen annually in US emergency rooms....Amongst the most helpful information, because it is recorded centrally and published annually, are data from version 5.0 of the US Fire Administration's National Fire Incident Reporting System, which indicate that, in 2002–2005, US fire departments responded to an estimated average of 182 home fires per year in which home oxygen equipment was directly involved in the fire itself. 46 people died in these fires per year and smoking was by far the leading factor in these incidents... annually, there are usually about 30  000 house fires in the UK (population 55 million), giving an incidence of 0.06% fires per citizen. This puts the incidence of home fires with oxygen (level 3–5) as twice that of the general population...[In conclusion] Supplemental oxygen is potentially a serious risk to fire safety in the home.