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2. Nominal Pipe Size - Wikipedia

   en.wikipedia.org/wiki/Nominal_Pipe_Size

   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 ...

3. Iron pipe size - Wikipedia

   en.wikipedia.org/wiki/Iron_pipe_size

   In 1948, the DIPS came into effect, when greater control of a pipe's wall thickness was possible. CTS diameter always specifies the outside diameter (OD) of a tube, where pipe diameter specifications only approximate the pipe inside diameter (ID) for sizes of 12 inch or less, and STD wall thickness.

4. Pipe (fluid conveyance) - Wikipedia

   en.wikipedia.org/wiki/Pipe_(fluid_conveyance)

   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 ...

5. National pipe thread - Wikipedia

   en.wikipedia.org/wiki/National_pipe_thread

   These threads are now used in materials other than steel and brass ... 3 + 1 ⁄ 2, 4, 5, and 6 inch, as pipe and fittings by ... Length L 2 Turns Diameter E 2; inch ...

6. Tube (fluid conveyance) - Wikipedia

   en.wikipedia.org/wiki/Tube_(fluid_conveyance)

   Both pipe and tube imply a level of rigidity and permanence, whereas a hose is usually portable and flexible. A tube and pipe may be specified by standard pipe size designations, e.g., nominal pipe size, or by nominal outside or inside diameter and/or wall thickness. The actual dimensions of pipe are usually not the nominal dimensions: A 1-inch ...

7. Big Inch - Wikipedia

   en.wikipedia.org/wiki/Big_Inch

   The Big Inch pipeline was made from sections of seamless 24-inch (61 cm) diameter steel pipe up to 44 feet (13 m) long, 3 ⁄ 8 inch (9.5 mm) thick and 4,200 pounds (1,900 kg) in weight. [34] The Little Big Inch used both 5 ⁄ 16 inch (7.9 mm) thick seamless steel and electric weld pipe, and a small amount of 1 ⁄ 2 inch (13 mm) thick ...