... energy, water conservation, metallurgy, aviation, astronautics, ship, nuclear industry and pressure vessel and so on, and has been exported to the ... to 1400 NameNominal diameterDN(mm)PliesForming methodConvolutionsPressure(Mpa)shapeTemp.()Bellowsfor pressure vesselΦ150-Φ45001-6Hydraulic forming1-4-10 to +10UΩ-100 ... joint used for the heavy oil catalytic cracking equipment elbow pressure balance type