无缝钢管dn40的管外径是多少
无缝钢管规格型号直径表如下DN公称直径,Ф外径DN15ф22mm,DN20ф27mmDN25ф34mm,DN32ф42mmDN40ф48mm,DN50ф60mmDN65ф7673mm,DN80ф89mmDN100ф114mm,DN125ф140mmDN150ф168mm。外径是48mmdn就是指公称直径直径,又叫均...
无缝钢管规格型号直径表如下DN公称直径,Ф外径DN15ф22mm,DN20ф27mmDN25ф34mm,DN32ф42mmDN40ф48mm,DN50ф60mmDN65ф7673mm,DN80ф89mmDN100ф114mm,DN125ф140mmDN150ф168mm。外径是48mmdn就是指公称直径直径,又叫均...