The welding residual stress of X80 pipeline steel butt joint is simulated by means of finite element analysis

and the distribution of residual stress is obtained. The results show that the overall variation trend of circumferential residual stress increases at first

and after arc stabilization

the residual stress reaches the peak and maintains

and then decreases near the arc ending position. The overall trend of axial residual stress increases at first and then steadily decreases after reaching the peak. The simulation results of residual stress are in good agreement with the two measurement methods

and the results of X-ray diffraction method are higher than those of blind hole method. Through the finite element simulation technology

the location of the larger stress can be predicted

which has great guiding significance in engineering application to prevent stress corrosion cracking effectively.