Surface Area of Pipe
| Size In. | Diameters-External In. | Diameters-Internal In. | Sq. Ft. per linear Ft. of Pipe – External | Sq. Ft. per linear Ft. of Pipe – Internal |
|---|---|---|---|---|
| 1/4 | 0.540 | 0.364 | 0.141 | 0.096 |
| 1/2 | 0.840 | 0.622 | 0.219 | 0.168 |
| 3/4 | 1.050 | 0.824 | 0.276 | 0.216 |
| 1 | 1.315 | 1.049 | 0.344 | 0.275 |
| 1 1/2 | 1.900 | 1.610 | 0.497 | 0.422 |
| 2 | 2.375 | 2.067 | 0.622 | 0.541 |
| 2 1/2 | 2.875 | 2.469 | 0.753 | 0.647 |
| 3 | 3.5 | 3.068 | 0.916 | 0.804 |
| 4 | 4.600 | 4.026 | 1.178 | 1.053 |
| 5 | 5.563 | 5.047 | 1.456 | 1.320 |
| 6 | 6.625 | 6.065 | 1.734 | 1.590 |
| 8 | 8.625 | 7.981 | 2.258 | 2.070 |
| 10 | 10.750 | 10.020 | 2.814 | 2.620 |
| 12 | 12.750 | 10.020 | 3.350 | 3.140 |
| 18 | 18.750 | 18.000 | 4.920 | 4.710 |
| 24 | 24.750 | 24.000 | 6.480 | 6.280 |
| 36 | 36.750 | 36.000 | 9.620 | 9.420 |
| 48 | 48.750 | 48.000 | 12.750 | 12.570 |
| 60 | 60.750 | 60.000 | 15.910 | 15.710 |