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In the USCS units, steel pipe is designated by the term nominal pipe size (NPS). Thus, a 10-inch nominal pipe size is referred to as NPS 10 pipe, and it has an actual outside diameter of 10.75 in. If the wall thickness is 0.250 in., the inside diameter is 10.25 in. Similarly, NPS 12 pipe has an outside diameter of 12.75 in.
The inside diameter of the casing determines the wall thickness or vice versa. Rather than a specific tolerance for the amount at which the internal diameter might exceed a nominal value, the tolerance specified by API and ISO is given in terms of minimum wall thickness. The minimum wall thickness is 87.5% of the nominal wall thickness.
Pitch, denoted by p, is the distance, parallel to the screw axis, between corresponding points on adjacent thread forms having uniform spacing. Major diameter, denoted by d, is the largest (outside) diameter of a screw thread. Minor diameter, denoted by dr or d1, is the smallest diameter of a screw thread. Pitch diameter, denoted by dm or d 2 ...
Nominal pipe size (NPS) is used to describe a pipe by name only. It is essentially a “reference” size and does not translate to an exact diameter measurement of pipe 12″ and smaller. In process piping the term nominal simply refers to the name of the pipe, much like a 2″ × 4″ piece of lumber. A 2″ × 4″ board does not actually ...
3.1.2 Pipe diameter. ASME Piping Code: The pipe diameter is identified by a dimensionless number called “nominal pipe size” or nominal diameter expressed in “nominal inches,” for example, NPS ½, ¾, 1, 11 / 4, 1 1 / 2, 2, 3, and 4 nominal inches. There is no direct correlation between the NPS and the actual pipe OD up to and including ...
A macroscopic global strain (or nominal strain) is defined with respect to the gauge length over the representative volume element (RVE) (or a whole sample in a material test), while a macroscopic local strain is equivalent to the mesoscopic global strain defined as a measure of the average deformation experienced by each cell (or a row of cells if one-dimensional simplification is adopted).
Pitch is the axial distance from the crest of one thread to its neighbor. Common units are length (i.e., the thread pitch is .) or number of threads per a specified length (i.e., threads per inch (TPI)). •. Lead is the axial distance the thread travels in one complete rotation of the pin relative to the coupling/box.
The nominal diameter is used as the channel diameter in the Computational Fluid Mechanics model and the aforementioned msth is used as the ks inside the channel, which is a necessary input to determine the associated pressure drop (∆P) and the exit fluid flow velocity over a certain channel length [11].
Pitch, denoted by p, is the distance, parallel to the screw axis, between corresponding points on adjacent thread forms having uniform spacing. Major diameter, denoted by d, is the largest (outside) diameter of a screw thread. Minor diameter, denoted by dr or d1, is the smallest diameter of a screw thread. Pitch diameter, denoted by dm or d 2 ...
In subject area: Chemistry. Pore size refers to the size of the openings or gaps in a filter membrane, which can vary depending on the method used to determine the porosity. It is important to note that pore size is an estimate and can vary within a range for a given rating. From: Encyclopedia of Separation Science, 2000.