What does a 100mm pipe refer to?
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When we talk about a 100mm pipe, do we refer to its inner diameter or outer diameter?
It refers to the nominal diameter of the pipeline, which is closer to the inner diameter.
DN100 refers to the nominal diameter of the pipe; it is what we commonly call a four-inch pipe. The inner diameter of this pipe is 114 mm, while the larger outer diameter is 108 mm
Pipes smaller than 14\" refer to the bore, which is slightly smaller than the inner diameter. Pipes larger than 14\" usually refer to the outer diameter.
It refers to the nominal diameter.....
It’s a DN100 pipe, with an inner diameter of 100
The concept of nominal diameter DN merely indicates the size class of the pipe. It indicates neither the inner diameter nor the outer diameter.
3# liheng9882197: DN100 should refer to a 4-inch pipe, not a 4/8-inch one
It is the nominal diameter; the outer diameter is generally 108. The inner diameter varies depending on the wall thickness, but the difference is minimal. 1# sxf10281028
The correct marking is DN100. It refers to the nominal size of the pipe; it does not represent the actual size of the steel pipe, and is used for matching with pipe fittings. Currently, DN100 seamless pipes in China can be divided into the European series, the American series, and those for special purposes. Speaking of DN100: the outer diameter for the European series is 108, while it is 114 for the American series; for special applications, it is 102, among other values.