How to calculate pipe diameter

If your goal is to calculate the diameter of the pipe, then it can be done using simple geometric calculations. Any pipe is a cylinder and has two diametera – external and internal, they differ by twice the wall thickness of the pipe. Payments can be made in different ways, depending on available data.

You will need

• Measuring tape

Instruction

1. In the most General case, the diameters pipe of wall thickness T can be calculated by measuring the circumference of its cross section. Let this length equal to L. Then, the formula for the circumference of a circle, its diameter will be equal to
   d1 = L / N where L is the length of the circumferential section of the pipe, P = 3,14
   Thus, D1 is the outer diameter.
2. The length of the inner diameterand pipe will be equal to
   d2 = d1 – 2 * T, where T is the wall thickness of the pipe
3. If you have a piece of pipe and is known for its length and surface area, the diameters can be calculated using the formula of the area of the cylinder surface
   d1 = P * h / S where h is a length of pipe, S is the surface area, P = 3,14
   d2 = d1 – 2 * T, where T is the wall thickness of the pipe