Method exit bag: will 150 bar pressure work?

[Predestinated]

I found a 8 liter argon cylinder online, description: "150 - 200 bar" (=pressure)

1. is it safe? why the hell do they write "150-200"? first time Ive seen that. Too imprecise?
2. will 150bar work too? or do u need 200 bar at least?

 

[goingoutinstyle]

1. It is quite imprecise, but maybe it's to prevent lawsuits? I'm not sure.
2. Since atmospheric air pressure is around 1 bar, 8 liters of compressed gas with pressure=150 bar is the same as 1200 liters of uncompressed gas (8*150=1200). The PPH recommends having a gas flow rate of 15/liters min, which means this gas tank will have 80 minutes worth of gas inside. That is wayy more than enough time!