Numerical simulation and creep-life prediction of X20 steam piping

Determination of the dominant failure mechanism of P92 steam piping subjected to daily operational cycle using finite element (FE) technique

“…(outer) of the jacket buttresses the fact that pyrogel is indeed a good insulation jacket for high-temperature components. 35 The plot for the creep stress and strain of the piping after one hour of steady-state analysis is shown in Figure 4(a) and (b) while the creep stress and strain after an hour of steady-state operation at the straight section of the piping is depicted in Figure 5. From the plots, it was discovered that the optimum creep stress (206.3 MPa) and strain (2.833×10 -4 ) was developed at the intrados of the elbows in the piping.…”

“…A plot showing the temperature distribution across thickness of the piping when it was subjected to steadystate analysis is shown in Figure 3. From the figure, it was discovered that the optimal applied operating temperature was maintained inside the piping, while the considerably low temperature value (42.9 ℃) developed on the insulation jacket signifies that the piping is well-insulated, and the characteristic low temperature value obtained on the surface (outer) of the jacket buttresses the fact that pyrogel is indeed a good insulation jacket for high-temperature components [35].…”

“…The steam med to have machined-finish surface with surface roughness 16 < Ra ≤ 40 μm, and tion technique with morrow was used in the analysis the temperature distribution across thickness of the piping when it was subjected to steadyshown in Figure 3. From the figure, it was discovered that the optimal applied operating s maintained inside the piping, while the considerably low temperature value (42.9 ℃) he insulation jacket signifies that the piping is well-insulated, and the characteristic low ue obtained on the surface (outer) of the jacket buttresses the fact that pyrogel is indeed a jacket for high-temperature components [35]. The plot for the creep stress and strain of the piping after one hour of steady-state analysis is shown in Figure 4(a) and (b) while the creep stress and strain after an hour of steady-state operation at the straight section of the piping is depicted in Figure 5.…”

Constitutive analysis of hot metal flow behavior of virgin and rejuvenated heat treatment creep exhausted power plant X20 steel

“…X20 has been extensively used since the 1960s for tubes and pipework of thermal power plants operating at temperatures of up to 565°C [2]. This steel exhibits high creep strength, excellent corrosion, and fatigue resistance [4][5][6][7].…”

“…After tempering, the desired microstructure is achieved thus enhancing solid solution strengthening [15]. Previous studies on 12 wt.% Cr steels have focused on the effects of rejuvenation heat treatment on mechanical properties and microstructure evolution of aged power plant steels [7,22,23]. However, the literature on metal ow behaviour and constitutive modelling of rejuvenated heat-treated creep-exhausted steels X20 steel is conspicuously missing in the literature.…”