Volume of Pipe

By jwright650 (*****)

Date 04-18-2005 12:43

Radius squared times 3.141593 times length = volume

Is this what you were asking for?
John Wright

By swnorris (****)

Date 04-18-2005 13:03

Check out this link:

http://www.riceromp.com/teachers/lessonContent.cfm?pId=110

By G.S.Crisi (****)

Date 04-18-2005 18:35

A word of warning: the radius is the actual inside radius, not the nominal one. If you measure the radius in inches, you should also measure the length in inches to get the volume in cubic inches.
Many piping tables show the volume of pipe per foot of length.
Giovanni S. Crisi
Sao Paulo - Brazil

By welder5354 (**)

Date 04-23-2005 03:15

Volume of Pipe= 0.785 x (dia.)² x length of pipe=cu.ft.
Volume of Pipe = 0.785(.5)²x 1’ = 0.19625 cu.ft
Formula: (0.785 constant)
Use the formula below to change inches to fraction of a foot.
6” pipe.
6” ÷ 12”=.5 ft > Therefore, 6 inch pipe is equal to .5 ft. So in the formula above instead of using 6 inches in the (dia.), use .5. The length of pipe could now be multiplied in feet.

By amir Date 06-27-2005 04:59

I Have another idea which is more reasonable:
Pipes up to 12" have nominal size of smaller than Outside diameter (e.g. NPS 12" has 12.75" outside diameter) and Pipes equal or greater than 14" have equal NPS and out side diameter.

Well each pipe has a wall thichness which should have been subtracted from outside diameter in order to achive inside diameter.

A pipe in a established NPS has various schedule consequently various wall thickness. You have to see the table of pipe schedules and find wall thichness of your pipe then subtract it from out side diameter to find inside diameter.

Vol. of pipe=
[3.1415*(outside diameter of pipe-wall thickness)^2 /4]*length

^: Power

Amir

By chall

Date 06-27-2005 14:12

To further complicate matters; if you need precision, you have to consider the tolerance of the pipe as well.

Most piping fabrication standards allow wall thickness to deviate up to 12.5% under the nominal size. So if you are calculating volume based on nominal size, your actual volume may be slightly higher due to less wall thickness.

Charles