600以上的都是焊接管道,公称直径和外径没有对应关系!
压力管道标准 规格
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,
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