Nb chart: Learn the difference and relation between NPS

Learn the difference and relation between NPS, NB and OD of pipes, and how they are measured in inches and millimeters. Also, find out what is NPT and its applications in pipe threading. 1.25" NB 42.2mm 1.661"1.5" NB 48.3mm 1.902" This document contains a chart listing pipe sizes, outer diameters, wall thicknesses, and weights. It includes pipe sizes from 15mm to 2000mm nominal bore in 1 inch increments, with corresponding dimensions in mm. Nominal Bore Nominal Bore ( NB ) is the European designation equivalent to NPS is DN (diamètre nominal/nominal diameter/Durchmesser nach Norm), in which sizes are measured in millimeters. NB is also frequently used interchangeably with NPS. Outside Diameter Outside diameter (OD) is the outside diameter of the pipe and is fixed for a given size.