You will need
Determine the radius of the tube R. If you want to calculate internal volume of pipe, it is necessary to find the inner radius. If you want to calculate the volume occupied by the pipe, we should calculate the radius. By measurements it's easy to get the diameter (both internal and external) and the length of the circumferential section of the pipe. If you know the diameter of the pipe, divide it into two. So, R=D/2 where D is the diameter. If you know the circumference of the cross section of the pipe, divide it by 2*PI, where PI=3.14159265. So, R=L/6,28318530, where L is the circumference.
Find the area of the cross section of the pipe. Raise the value of the radius squared and multiply it by PI. Thus, S=PI*R*R, where R is the radius of the tube. The cross-sectional area will be found in the same system of units, which had taken the radius value. For example, if the radius value is represented in centimeters, the cross-sectional area is calculated in square centimeters.
Calculate the volume of the pipe. Multiply the sectional area of the pipe to the length. The volume of the pipe V=S*L, where S is the cross-sectional area and L is the length of the pipe.
Make sure to use the values of radius and length of the pipe expressed in the same units of measurement.
When the calculator, store in his memory the number of 2*PI. So you can easily calculate several values of the volume of tubes with different radii.
Advice 2: How to find the volume of a pipe
Calculation of volume of any body is one of the classical problems of applied science. Such calculations are often required in engineering. To find the volume of the pipe, is sufficient to produce a series of mathematical actions.
You will need
Measure internal or external diameter of the pipe, and the length of the circumferential section.
Find the radius of the pipe . If you want to calculate the internal volume, you need to find the inner radius. To calculate the volume that is occupied by the body, you need to calculate the outside radius. Divide the diameter by two. R=D/2. You can also use the length of the cross section: R=L/6,28318530. Here L is the length of the circumference, and the number is twice PI.
Calculate the cross-sectional area of the pipe. The radius value to construct a square, multiply it by PI. The cross-sectional area will be expressed in the same units as the radius value. For example, the radius is represented in centimeters. In this case, the cross-sectional area is expressed in square centimeters. The formula that calculates the cross-sectional area: S = R2*PI, where S is the desired area and R2 is the radius.
Find the volume of the pipe. To do this, multiply the length of pipe to the area of its cross section. Formula: V=S*L, where V is the volume of the pipe, S is the cross – sectional area, L is the length.
Similarly, find the volume of all tubes (if they have different diameters).
You must make sure that the length of the pipe and the radius are expressed in the same units of measurement. Otherwise you will get wrong value. Usually all calculations are done in centimeters and square centimeters.
If during the calculation you use a calculator in his memory can be recorded twice the number PI. Then we will quickly calculate the values of several volumes if you need to find the volume of the pipes with different diameters. Also in the memory of the calculator or computer, you can make ready-made formula for quick to make the necessary calculations. If you often work with mathematical formulas, can be downloaded from the Internet a special program.