DN-公称直径

Ф-外径 大外径系列 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,

小外径系列

DN15-ф18mm,DN20-ф25mm

DN25-ф32mm,DN32-ф38mm

DN40-ф45mm,DN50-ф57mm

DN65-ф73mm,DN80-ф89mm

DN100-ф108mm,DN125-ф133mm

DN150-ф159mm,DN200-ф219mm

DN250-ф273mm,DN300-ф325mm

DN350-ф377mm,DN400-ф426mm

DN450-ф480mm,DN500-ф530mm

DN600-ф630mm,

De63=DN50

DE58=DN50

DE52=DN45

DE46=38

DE38=DN32

DE25=DN20

还有一些新形管材,可能与上述不配套,可以参照选用公称直径。

2009-03-10 10:24:32