what is the difference between nominal bore and internal diameter?
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Internal diameter varies according to the wall thickness. nominal : existing as something in name only : not actual or real. There is no relationship between the NB and outside diameter of the pipe. The pipe size is specified with two numbers: the nominal pipe diameter (or nominal bore) and the pipe schedule.
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Generally, chest tubes divide into two size varieties: large-bore and small-bore. A large-bore chest tube is 20 Fr or larger, while a small-bore chest tube is smaller than 20 Fr. Smaller tubes are also available and are known as pleural catheters.
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For example, if you take a 63mm pipe, the outside diameter of the pipe measures 63mm. The name and measurement are the same in the metric system.
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For example, a pipe could have a 250mm nominal diameter and a schedule of 80. Tubes are classified by their outside diameter measurement and thickness. A copper tube, for instance, could be 10 mm with a 2 mm thickness. Pipes accommodate larger applications with sizes that range from a half-inch to several feet.
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The key difference between types L and M is their pressure rating and wall thickness. The most common copper pipe sizes are ½ and ¾ inches. Type M ½ inch measures 0.028” in wall thickness whereas type L ½ inch measures 0.04” in wall thickness.
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Pipes accommodate larger applications with sizes that range from a ½ inch to several feet. Tubing is generally used in applications where smaller diameters are required. Tubing is typically ordered to outside diameter and wall thickness; however, it may also be ordered as OD & ID or ID and Wall Thickness.
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As a general “rule of thumb” an NPT thread is approximately 1/4″ (0.25”) larger than its “name.” For a 1/4″ NPT fitting the “nominal” OD is 0.533”. NPT fittings are slightly tapered so the “nominal” diameter is the diameter in the middle of the threaded portion, as measured by the top (crest) of the threads.
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OD and Nominal Pipe Size Tubing is measured by the OUTSIDE DIAMETER (O.D.), specified in inches (e.g., 1.250) or fraction of an inch (eg. 1-1/4″). Pipe is usually measured by NOMINAL PIPE SIZE (NPS). Although it is related to the outside diameter, it is significantly different.
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Inch sizes are specified using the nominal major diameter and the number of threads per inch. ... Metric thread callouts are fundamentally different because the thread pitch (distance between each thread, in mm) is specified instead of threads per inch or per mm. For example, an M10x1.
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The jet orifice of redwood viscometer 1 has an internal diameter of 1.62mm and length of 10 mm. The jet orifice of redwood viscometer 2 has an internal diameter of 3.8 mm and length of 15mm. It is used to determine the viscosity of less viscous oils having flow (efflux) time less than 2000 second.
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20 mm cartridges have an outside bullet diameter and inside barrel diameter of 0.787 inches (20.0 mm). Projectiles are typically 75 to 127 mm (3–5 in) long. Cartridge cases are typically 75 to 152 mm (3–6 in) long and most are shells, with an explosive filling and detonating fuze.
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The internal diameter of the threaded opening on a two liter launch bottle is 21.0 mm. The internal diameter of the lower 1/2 of the fin assembly is 21.3 mm. The internal diameter of the pop bottle where the external threads are located is 21.1 mm.
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Though big-block engines are significantly larger than their small-block brethren, the true difference between these two is more about displacement, bore, and stroke than strictly size. Typically, big-block engines have displacements of greater than 400 cubic inches and small block engines have a smaller displacement.
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For example, a 26 gauge needle has an O.D. (outer diameter) of 0.46 mm and an I.D. of 0.26 mm while the 26s gauge needle has an O.D. of 0.47 mm and an I.D. of 0.13 mm. ... Also, the difference in the wall thickness nearly doubles with 26s gauge having a thickness of 0.18 mm while the 26 gauge is only 0.10 mm.
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The outside diameter of the bearing is what fits into the engine block, and the crankshaft rests on the inside diameter. An oversized bearing has the same inside diameter but a bit more material on the outside diameter. An undersized bearing measures the same outside but is thicker on the inside.
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What is the difference between pipe and tubing? Pipe is always named by its approximate inside diameter and schedule, or wall thickness. Tubing is usually measured by its outside diameter because the outside diameter of tubing is accurate.
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Sizes 26" and bigger are covered by B16. 47 series A or series B for weldneck and blind flanges. Series A flange is heavier, thicker and cost more whereas series B flange has more bolt holes and is lighter cheaper than series A. API605 flange and series B flanges are same thing.