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Question:

Is the writing method of plastic pipes DN or De? What does that mean?

Is the writing method of plastic pipes DN or De? What does that mean?

Answer:

DN refers to the nominal diameter nominal diameter, also known as the average diameter (mean, outside, diameter), that is, the general caliber of the pipe.
The numbers followed by DN indicate the size of the pipe. The nominal diameter can be expressed in metric mm or in English in. Usually close to the inside diameter; a standard term for engineering installations.
De (nominal outside diameter) *e (nominal wall thickness) is the seamless pipe representation. The plastic pipe shall be expressed as de (nominal outer diameter) *e (nominal wall thickness).

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