2 inch ductile cast pipe corresponds to DN is?

In the pipe specification system, 2 inches corresponds to a nominal diameter (DN) of DN50.

Inch is the imperial unit of length, and the nominal diameter DN is the standardised diameter of the pipe, neither external nor internal diameter, but with the actual size of the pipe is similar to a nominal diameter. In the field of pipeline engineering, in order to unify the standard for the convenience of design, manufacture, installation and maintenance, people developed the concept of nominal diameter. 1 inch is equivalent to about 25.4 mm, 2 inches that is about 50.8 mm, in the nominal diameter of the correspondent relationship, it is approximately corresponds to DN50.

Like the netizen mentioned 2 inches of ductile casting pipe, in practical applications, if it involves connection with other fittings, installation and other operations, DN50 as the specification marking, can be more convenient and in accordance with the nominal diameter of the standard manufacturing fittings, valves and so on to match. For example, in water supply and drainage, gas transmission and other pipe network system construction, understanding this correspondence, help to ensure the compatibility and stability of the entire piping system.

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