you need
  • - Roulette;
  • - caliper;
  • - strong thread;
  • - Calculator.
Guide
1
To calculate the area round tubes find the length of the pipe in the meter.Also needed for calculating the outer diameter of the pipe.
2
Calculate the value of the outer diameter of the gas pipe.It does this in two ways.The first method - measure the outside diameter of the gas pipe with calipers.To do this, open your jaws of the measuring instrument and attach it to the pipe so that the pipe was between sponges caliper.Then slide the sponge measuring tool they need to tightly encircle the gas pipe.Looking at the measuring scale, define the outer diameter of the pipe.The second way - tight grasp pipe
thread.Then measure with a tape measure the circumference of the pipe.Substituting a value in the formula D = L / P, where L - length of the circumference of the pipe, P = 3.14 (number of "pi"), calculate the value of the outer diameter of the gas pipe.Put the resulting figure to meters.
3
Determine the area of ​​the gas pipe, using the following formula: S = 2 * pi * DMP * R, where P - number of "pi" (3.14), PMD - the length of the gas pipe in running meters,and R - the radius of the outer tube.Given that the diameter is twice the radius, divide the resulting as a result of early settlement figure on the outer diameter 2. Put all the required data into the formula and calculate the area of ​​the pipe.