... Cr25Ni35,HK40,steel 3.ISO9001:2008 Flange is a mechanical part which used for connecting pipe. ... Standard BS, French standard NF, Italian standard UNI, a, Nominal pressure: 0.1, 0.25, 0. ... Diameter Steel Flanges> ,B16.36 etc.. a,Nominal pressure: 150psi (2.0Mpa), 300psi (5.0Mpa ... American Flange of Americas flange system. on GB standards, largest nominal pressure is 4Mpa of Europe flange ...