TABLE OF CONTENTS 
| W p = | weight per unit length of pipe (shaded area), lb m/ft |
| D i = | inside diameter of pipe, in. |
| D o = | outside diameter of pipe, in. |
| D 1 = | outside diameter of insulation 1, in. |
| D 2 = | outside diameter of insulation 2, in. |
| D 3 = | outside diameter of insulation 3, in. |
| T p = | thickness of pipe, in. |
| T 1 = | thickness of insulation 1, in. |
| T 2 = | thickness of insulation 2, in. |
| T 3 = | thickness of insulation 3, in. |
| ? p = | specific weight of pipe material, lb m/ft 3 |
| ? 1 = | specific weight of insulation material 1, lb m/ft 3 |
| ? 2 = | specific weight of insulation material 2, lb m/ft 3 |
| ? 3 = | specific weight of insulation material 3, lb m/ft 3 |
| W 1 = | insulation 1 weight per unit length, lb m/ft |
| W 2 = | insulation 2 weight per unit length, lb m/ft |
| W 3 = | insulation 3 weight per unit length, lb m/ft |
| W T = | total weight of pipe, insulation, and internals per unit length, lb m/ft |
| ? = | specific gravity of process fluid |
Weight of the pipe per unit length is as follows:
Weight of the internal fluid is as follows:
The insulation weights are calculated as follows:
General formula for the insulation weights is
The total weight of the piping is
A 12"
