Pipe Nominal Size (NB) Outside Diameter Wall Thickness Description Black Kg/m Surface Finish Black Galvanized Kg/m Surface Finish (Gal) 15 21.3 2.6 M 1.2   1.22       3.2 H 1.43   N/A   20 26.9 2 XL 1.23   1.28       2.3 L 1.4   1.44       2.6 M … Continue reading PIPE