1. • 1. Gather the necessary information. You will need to know the outside diameter of the pipe. This is the distance of a straight line that runs through the center of the pipe and connects two points on the pipe's surface. You will also need to know the wall thickness of the pipe. Both of these measurements should be taken in inches. The final thing that you will need to know is the length of the pipe. This last measurement should be taken in feet.

2.  Subtract the pipe's wall thickness from the pipe's outside diameter. For example, if you had a pipe with a diameter of six inches and a wall thickness of two inches, you would subtract two from six to get four.

3. Multiply the result of Step 2 by the wall thickness. Using our example, this would give us four x two or eight.

4. Multiply the result of Step 3 by 10.68. Using our example, this would give us eight x 10.68 or 85.44.

5. Multiply the result of Step 4 by the length of the pipe. Using our example and assuming that we have a pipe 10 feet long, this final step would result in the calculation 10 x 85.44 or 854.4 lbs. The product of this step is the weight of the pipe expressed in pounds.