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Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " 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 ...
The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10 −2 metres ( 1 / 100 m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimeters; 1 cm – 0.39 inches; 1 cm – edge of a square of area 1 cm 2
Pipe sizes can be confusing because the terminology may relate to historical dimensions. For example, a half-inch iron pipe does not have any dimension that is a half inch. Initially, a half inch pipe did have an inner diameter of 1 ⁄ 2 inch (13 mm)—but it also had thick walls. As technology improved, thinner walls became possible, but the ...
As a unit of area, the circular mil can be converted to other units such as square inches or square millimetres. 1 circular mil is approximately equal to: 0.7854 square mils (1 square mil is about 1.273 circular mils) 7.854 × 10 −7 square inches (1 square inch is about 1.273 million circular mils) 5.067 × 10 −10 square metres
A Fixture Unit is not a flow rate unit but a design factor. A fixture unit is equal to 1 cubic foot (0.028 m 3) of water drained in a 1 + 1 ⁄ 4 inches (32 mm) diameter pipe over one minute. [2] One cubic foot of water is roughly 7.48 US gallons (28.3 L; 6.23 imp gal). A Fixture Unit is used in plumbing design for both water supply and waste ...
During the IPS period, pipes were cast in halves and welded together, and pipe sizes referred to the inside diameters. [1] The inside diameters under IPS were roughly the same as the more modern Ductile Iron Pipe Standard (DIPS) and Nominal Pipe Size (NPS) Standards, and some of the wall thicknesses were also retained with a different ...
The miner’s inch measures the amount of water that would flow through a slot of a given area at a given pressure (for example, at a head of 6 inches of water, or 1.5 kPa.) In miner's inch the word inch refers to the area of the slot in square inches, while the pressure in inches of water refers to the height of water above the slot. A ...
British Standard Pipe Parallel Thread Dimensions; British Standard Pipe Taper Thread Dimensions Archived 2017-09-27 at the Wayback Machine; BSP Thread Charts and Diagrams, showing dimensions of tubing and fittings; ISO 7-1:1994; ISO 7-2:2000; ISO 228-1:2000; ISO 228-2:1987; Parallel pipe threads G; Parallel pipe threads PF