silly question on gas detector
- Thread starter sunlover
- Start date
propane is around 100 psi. it's all about engineering the bottle as dive tanks are 3000psi and frequently overfilled.
it's academic. CNG is a failure because of low energy density. Companies like Energy Transfer are now shipping ethylene around the world as it's easier to manage than methane without cryo tanks.
CNG is a compressed gas, ethylene ina a liquified gas. It has a expansion ratio of 470 ( almost twice of propane) and a flammable range of 2 to 36%! As my instructing partner says “you can throw a cat through that it’s so wide!” That’s more than twice of propane. A ignition temp of 490 which is half of propane. It’s only redeeming value ( safety wise) over propane is it’s vapor density which is only .02 lighter than air. So it won’t readily rise and will be effected by temp which is highly probably given it vaporizing when it’s leaking ( either in the bottle or out in atmos at 470:1. This isn’t even talking about the BLEVE potential of having a flammable liquified gas in a container at 500 psi compared to lpg at 120. Sorry, not buying it.
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