What does the size DN of the PU steel wire hose mean?

by:Haikuo     2021-06-22
The size DN of PU steel wire hose and other pipes refers to the inner diameter or the outer diameter. According to different industries, in the industry of industrial hoses, people are used to speaking of DN as the inner diameter. For example, DN25 refers to the PU steel wire hose with an inner diameter of 25mm.
  DN means the nominal diameter of the pipeline. It is the size of all pipeline accessories in the pipeline system. It is a convenient round integer for reference and does not have a strict relationship with the processing size. The nominal diameter is marked with a number immediately after the letter 'DN'. The nominal diameter is also called the average outer diameter. This is due to the fact that the pipe wall of the metal pipe is very thin, and the outer diameter of the pipe is almost the same as the inner diameter of the pipe, so the average value of the outer diameter of the pipe and the inner diameter of the pipe is taken as the pipe diameter.

  DN is the nominal diameter (nominal diameter), which is the common diameter of various pipes and pipeline accessories.
   The pipes and pipeline accessories of the same nominal diameter can be connected to each other, which is interchangeable. It is not the actual pipe outer diameter or inner diameter, although its value is close to or equal to the pipe inner diameter; in order to make the pipes and pipe fittings The connection size is uniform, and the nominal diameter (also known as the nominal diameter and the nominal diameter) is adopted.
  For example, welded steel pipes can be divided into thin-walled steel pipes, ordinary steel pipes and thickened steel pipes according to their thickness. Its nominal diameter is neither the outer diameter nor the inner diameter, but a nominal size similar to the inner diameter of ordinary steel pipes. Each nominal diameter corresponds to an outer diameter, and the value of the inner diameter varies with the thickness. Nominal diameter can be expressed in metric system mm or in imperial system.
  The specifications of the PU steel wire hose produced by Hangzhou Haikuo range from DN25mm to 500mm, and the pipe wall thickness ranges from 0.4mm to 1.5mm. Any PU steel wire hose specification and size can be customized to meet the needs of various industries.
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