无缝钢管公称直径与外径对照表

大外径系列小外径系列DN15-ф22mmDN15-ф18mmDN20-ф27mmDN20-ф25mmDN25-ф34mmDN25-ф32mmDN32-ф42mmDN32-ф38mmDN40-ф48mmDN40-ф45mmDN50-ф60mmDN50-ф57mmDN65-ф76(73)mmDN65-ф73mmDN80-ф89mmDN80-ф89mmDN100-ф114mmDN100-ф108mmDN125-ф140mmDN125-ф133mmDN150-ф168mmDN150-ф159mmDN200-ф219mmDN200-ф219mmDN250-ф273mmDN250-ф273mmDN300-ф324mmDN300-ф325mmDN350-ф360mmDN350-ф377mmDN400-ф406mmDN400-ф426mmDN450-ф457mmDN450-ф480mmDN500-ф508mmDN500-ф530mmDN600-ф610mmDN600-ф630mm压力管道标准规格DN-公称直径Ф－外径