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Nominal bore which is designation for pipe size.
Pipe bore is the actual minimum inside diameter of a pipe, which is not necessarily the nominal pipe size.
NB (nominal bore) is the European designation equivalent to NPS is DN (diamètre nominal/nominal diameter/Durchmesser nach Norm), in which sizes are measured in millimeters. NB (nominal bore) is also frequently used interchangeably with NPS.You can refer more details herehttp://www.piping-engineering.com/nominal-pipe-size-nps-nominal-bore-nb-outside-diameter-od.html
The term "15NB" refers to a nominal bore size of a pipe, specifically indicating that the pipe has an approximate internal diameter of 15 millimeters. "NB" stands for "Nominal Bore," which is a standard measurement used to describe the size of pipes in plumbing and engineering applications. This designation helps in identifying the size of the pipe for fittings and connections, ensuring compatibility in installations.
In the context of flanges, "nb" typically refers to the nominal bore, which is the nominal diameter of a pipe or fitting. It indicates the internal diameter of the pipe and is used to standardize measurements for flanges, ensuring compatibility between different components in piping systems. The nominal bore is important for determining the appropriate size and type of flange needed for a specific application.
Nominal bore which is designation for pipe size.
Pipe bore is the actual minimum inside diameter of a pipe, which is not necessarily the nominal pipe size.
The nominal bore of a pipe is its internal diameter. The nominal bore determines how much volume you have in the pipe to transport your particular substance.
NB stands for "Nominal Bore" and refers to the nominal size of the valve in a piping system, typically measured in inches. It represents the internal diameter of the valve or pipe. It is an important parameter used to select the right valve for a specific application.
The outside diameter (OD) of a 40-inch nominal bore black steel pipe is typically 40 inches, as the nominal size refers to the approximate internal diameter of the pipe. However, the actual OD for standard pipe sizes can vary; for a 40-inch nominal bore, the standard OD is approximately 42.16 inches according to the American National Standards Institute (ANSI) specifications. This discrepancy is due to the wall thickness of the pipe, which is accounted for in the nominal size.
NB (nominal bore) is the European designation equivalent to NPS is DN (diamètre nominal/nominal diameter/Durchmesser nach Norm), in which sizes are measured in millimeters. NB (nominal bore) is also frequently used interchangeably with NPS.You can refer more details herehttp://www.piping-engineering.com/nominal-pipe-size-nps-nominal-bore-nb-outside-diameter-od.html
NB = Nominal Bore
Nominal Bore Actuators.
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NB is nothing but Nominal Bore.
The nominal bore size of a 12-gauge shotgun refers to the diameter of the shotgun's barrel, which is approximately 0.729 inches (18.5 mm). The "gauge" system measures the number of lead balls of the bore diameter that can fit into a pound; thus, a 12-gauge shotgun is designed to accommodate 12 lead balls of that diameter. This measurement influences the shotgun's performance, including its shot pattern and recoil.
bore of the pipe is the internal diameter of pipe but the nominal diameter of pipe is the dia of a circle which is draw through a point which is situates at exactly half of the thickness of pipe or we can say that (outer dia of pipe- thickness of pipe )=nominal bore of pipe.