塑料管公稱直徑和外徑對照表

公稱直徑                           塑料管外徑

 DN 15                                De 20

DN 20                                 De 25

DN 25                                 De 32

DN 32                                 De 40

DN 40                                 De 50

DN 50                                 De 63

DN 65                                 De 75

DN 80                                 De 90

DN 100                                De 110

鋼管公稱直徑和外徑對照表

壓力管道标準    規格    DN-公稱直徑      Ф－外徑   
大外徑系列   

   DN15-ф22mm，     DN20-ф27mm
    DN25-ф34mm，     DN32-ф42mm
    DN40-ф48mm，     DN50-ф60mm
    DN65-ф76(73)mm， DN80-ф89mm
    DN100-ф114mm，   DN125-ф140mm
    DN150-ф168mm，   DN200-ф219mm
    DN250-ф273mm，   DN300-ф324mm
    DN350-ф360mm，   DN400-ф406mm
    DN450-ф457mm，   DN500-ф508mm
    DN600-ф610mm，