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Old 08-09-2019, 12:33 PM   #41
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 6,398
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
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Originally Posted by Sleddgracer View Post
propane flows to the ground when it leaks, CNG rises when it leaks so CNG must weigh less per gal than Propane - perhaps tanks filled with helium would lower GVW?
Your propane tank is filled with LIQUEFIED petroleum gas. The liquid boils off and provides the gas that you burn. LPG tanks will see 100-300psi depending on temperature.

CNG tanks are filled with COMPRESSED natural gas. It is compressed to over 3000 psi but still in a gaseous state.

Helium tanks make me talk funny....

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Old 08-09-2019, 12:43 PM   #42
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Join Date: Nov 2018
Location: south east BC, close to the Canadian/US border
Posts: 2,265
Year: 1975
Coachwork: Chevy
Chassis: 8 window
Engine: 454 LS7
Rated Cap: 24,500
Quote:
Originally Posted by PNW_Steve View Post
Your propane tank is filled with LIQUEFIED petroleum gas. The liquid boils off and provides the gas that you burn. LPG tanks will see 100-300psi depending on temperature.

CNG tanks are filled with COMPRESSED natural gas. It is compressed to over 3000 psi but still in a gaseous state.

Helium tanks make me talk funny....


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