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大外径系列公称直径管道外径公称直径管道外径DN15ф22mmDN150ф168mmDN20ф27mmDN200ф219mmDN25ф34mmDN250ф273mmDN32ф42mmDN300ф324mmDN40ф48mmDN350ф360mmDN50ф60mmDN400ф406mmDN65ф76mmDN450ф457mmDN80ф89mmDN500ф508mmDN100ф114mmDN600ф610mmDN125ф140mm小外径系列公称直径管道外径公称直径管道外径DN15ф18mmDN150ф159mmDN20ф25mmDN200ф219mmDN25ф32mmDN250ф273mmDN32ф38mmDN300ф325mmDN40ф45mmDN350ф377mmDN50ф57mmDN400ф426mmDN65ф73mmDN450ф480mmDN80ф89mmDN500ф530mmDN100ф108mmDN600ф630mmDN125ф133mm