Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside diameter).

For instance, a 2-inch galvanized steel pipe has an inside diameter of about 2 1/8 inches and an outside diameter of about 2 5/8 inches. In plumbing pipe size is referred to as nominal pipe size - NPS, or "Nominal Pipe Size". The metric equivalent is called DN or "diametre nominel".

Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. Pipe size is specified with two non-dimensional numbers: a nominal pipe size (NPS) for diameter based on inches, and a schedule (Sched. or Sch.) for wall thickness.

Fluids Flow Design and Engineering Metric Pipe Sizes Dn "Diametre Nominel" per ISO vs NPS "Nominal Pipe Size" Equivalent for DN 6 to DN 2200, NPS Schedule 5 to 30 Welded and Seamless PIpe

Dec 6, 2014 · Wall thickness of pipes available in different standard schedules (SCH.) for NPS (Nominal Pipe Size in “inch”) as well as DN (Diameter Nominal in “mm”) are shown in below chart.

Mar 2, 2018 · Schedule 40 Pipe 2 Inch (DN50 mm) Standard : ANSI/ASME B36.10 (Steel Pipe) – Size : NPS 2 Inch – Size : DN50 mm – Inside Dimeter (Pipe ID) : 52.48 mm – Outside Dimeter (Pipe OD) : 60.3 mm – Pipe Wall Thickness : 3.91 mm – Pipe Weight : 5.44 Kilogram per meter (kg/m) – Pipe Weight Including Water : 7.6 Kilogram per meter (kg/m)

NPS Pipe Size is a short form of Nominal Pipe Size and measured in inches (in.). NPS or Nominal Pipe Size is a North American standard which is used to measure Industrial Steel Pipes.

Nominal pipe size (NPS) is a dimensionless designator of pipe size. It indicates standard pipe size when followed by the specific size designation number without an inch symbol. For example, NPS 6 indicates a pipe whose outside diameter is 168.3 mm.

Nominal Pipe Size (NPS) is a standardized system used to describe the size of pipes in various industries, particularly in plumbing and piping. NPS is a non-dimensional term that does not directly reflect the actual physical dimensions of a pipe, such as its inside or outside diameter.

This page details the RHFS NPS Tables for Selected Pipe Sizes. RHFS is a leading distributor for fluid control systems, fluid filtration systems & fluid handling products.