压力管道标准(DN对照)规格(大外径系列):DN公称直径 ;外径DN1522mm,DN20-27mm;DN25-34mm,DN32-42mmDN4048mm,DN50-60mm;DN65-76(73)mm,DN80-89mmDN100-114mm,DN125-140mm;DN150168mm,DN200-219mmDN250-273mm,DN300-324mm;DN350-360mm,DN400-406mmDN450-457mm,DN500-508mm;DN600-610mm规格(小外径系列):DN-公称直径 ;外径DN15-18mm,DN2025mm;DN25-32mm,DN32-38mmDN4045mm,DN5057mm;DN65-73mm,DN80-89mmDN100108mm,DN125-133mm;DN150159mm,DN200-219mmDN250-273mm,DN300-325mm;DN350-377mm,DN400-426mmDN450-480mm,DN500-530mm;DN600630mm