I will work with the assumption that you mean an 18 inch diameter pipe.
The radius (r) is 9 inches and the length (l) is 12 inches per foot.
The volume contained will be calculated by ∏r2l = ∏ x 92 x 12.
If we use 3.1416 as the value of ∏, that gives us 3.1416 x 81 x 12, which works out at 3,053.6352 cubic inches of water.
Now, an Imperial gallon and a US gallon are different - an Imperial gallon holds 277.42 cubic inches and a US gallon holds 231 cubic inches
So in Imperial gallons the 12 inches of pipe holds 3,053.6352 / 277.42 = 11.0072 gallons
and in US gallons it holds 3,053.6352 / 231 = 13.2192 gallons.
One foot of 3 inch pipe will hold approximately 0.625 gallons of water.
0.1631168The value 0.1631168 is the number of US gallons per foot of 2" pipe. The number of gallons per foot of 4" pipe is 0.652798
The cross-section area of the 2-inch bore inside the hose is (pi R2) = 'pi' square inches.The volume in 1-ft of the hose is [ 12 pi ] cubic inches.1 gallon = 231 cubic inchesGallons in 1-ft of hose = (12 pi)/231 = 0.1632 gallon (rounded)Length of hose per gallon = (231)/(pi) = 73.53 inches (rounded)
One gallon of water equates to 231 cubic inches.There are 231 cubic inches in one gallon of water.
There is 1.5 gallons per foot in 6" pipe and 2.59 gallons in 8" pipe, so I would think there should be about 2 gallons per foot in 7" pipe.bob... 1.998 gallon Pi x R Sq x L (12") divided by 231 as there are 231 " in a gallon(pie)2.14R^2 * L / 27 all must be in the same units (ft. is best)you get a (cu ft) answer h20 is 7.5 gal per cu ft 7.48 gal per cubic foot which equils 1 fixture unit If your figuring inches you take Pi x R 2 x L divided by 231 as there are 231" in a gallon IF your figuring feet you take Pi x R sq x L x 7.48 as there are 7.48 gallon in a CUBIC foot
One foot of 3 inch pipe will hold approximately 0.625 gallons of water.
A 12 inch diameter round pipe will hold 4.89 UK gallons or 5.88 US gallons per foot.
17,000 gallons
0.212 331 gallons per foot.
18.264 gallons of water im not tottlaly shur but its my guess
It will hold 477.4 gallons of water per 1,300-foot section.
2.75 Imperial gallons.
A 24-inch diameter cylinder holds 23.5 gallons of water per foot of length/height.
1 and 1/2 gallons
Over 9,000.
A 5-inch pipe will hold approximately 0.36 gallons of water per linear foot. This calculation is based on the formula for calculating the volume of a cylinder (V = πr^2h), where the radius (r) is half the diameter of the pipe (2.5 inches) and the height (h) is 1 foot.
A two inch pipe can hold 0.1632 gallons per foot. It takes slightly over 6 feet of two inch pipe to hold one gallon of water.