Life Assessment Methods for Pressure Bearing Components inPower Station Boiler

Domestic and overseas life assessment methods for the pressure bearing components in powerstation boiler under operation conditions were reviewed.Two types of assessment methods were focused,i.e.,extrapolating the data of conventional creep rupture test,and measuring creep deformation and crack propagation.The first type methods included extrapolation method by creep rupture strength curve,time-temperature parametersmethod,Robinson life consumption rule and so on.The second type methods includedθ method,C projectionmethod,gradual extrapolation method by creep curve,assessment method by creep rupture and crack propagationans so on.