What does "DN" and "Dn" mean in plastic pipes? And de?
DN, Dn said the method is wrong, the correct representation should be DN, on behalf of the nominal diameter; de represents the outer diameter of the pipe (PVC pipe, PE pipe is generally PPR or other non - metal pipe).
Plastic pipe, DN said nominal outer diameter, since 2002, the national standard provides DN plastic pipe nominal outer diameter, the abolition of the past Dn, De, de and other several forms of expression. Before that, use Dn, De, De to indicate nominal outside diameter, outer diameter, etc..
DN means nominal diameter or nominal diameter. Is the general caliber of various tube and pipe accessories, with a nominal diameter of the tube and pipe accessories can connect with each other, with interchangeability. It is not a real sense of the pipe diameter or diameter, although its value is closer with the pipe diameter or equivalent;De refers to the outer diameter,DN and Dn mean the same thing. Like De and de
