... , metallurgy, aviation, astronautics, ship, nuclear industry and pressure vessel and so on, and has been exported to ... to strive for the development, positively promote the new material, new technologic application, struggle for finem large-scale, ... 1400 NameNominal diameterDN(mm)PliesForming methodConvolutionsPressure(Mpa)shapeTemp.()Bellowsfor pressure vesselΦ150-Φ45001-6Hydraulic forming1-4-10 to ...