From: "Geo." 

LP becomes a liquid at 140psi (at room temperature) so it's useless to go
much higher than that.

Geo.

"Frank Haber"  wrote in message
news:45a12df4$1{at}w3.nls.net...
> What's the pressure in those big, lay-down white tanks?  Cast steel?  How
> thick?  I saw high-speed film once of a 5-foot "H" tank of
Oxygen being
> hit with a full-patch military round.  That was impressive even without
> ignition (2000 psi).

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