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bigvon@be*.ne* wrote: > Does anyone know a method or formula for determining the cubic foot ( sorry I am > not into metric) volume of a cylinder by filling it with water? Usualy you don't even have to fill it with anything. The internal volume (ie. water capacity), rated pressure, test pressure, the empty weight allong with other "usefull" informations is stamped onto the tanks -- at least over here in europe. To calculate the "air capacity" you have to multiply the volume by rated pressure and devide by ambient pressure to get the units right. Reminds me off my first scuba classes :-) Example: Druckluft-TG 200 828-V-7-300-7.2 Explanation: Druckluft-TG (country specific notation for scuba "air" tank) 200 [bar] is the rated fill pressure 828 is a coding for the material (in this case steal) V-7 denotes 7 [liter] water capacity 300 [bar] is the test pressure 7.2 [kg] is the weight of the tank The air capacity of that tank would be: Metric Imperial 7l x 200bar 0.247 cuft x 2900 psi ----------- = 1400 l --------------------- = 50 cuft 1 bar 14.5 psi To convert l to cuft (or vice versa) 1400 l ----------- = ~50 cuft 50 cuft * 28.3 l/cuft = 1415 l 28.3 l/cuft Over here nearly all tanks are rated 200 bar (~2900psi). There are 232bar (~3365psi) and 300bar (4350psi) HP tanks, but these are rather uncommon (maybe except in scandinavia). Regards, Frank -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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