The paper introduces the measure for controlling the weld distortion of huge crane beam and the procedure for assembling and welding of the beam.

Electron Beam welding (EBW) is a mature welding process which offers many advantages in terms of weld productivity, avoidance of distortion and minimal metallurgical disturbance.

This paper deals with the general calculation of fracture mechanics on the weld defects of a spherical tank. The additional bending stresses caused by both the angular distortion and the stagger toe.