Patent ID: 8536479

Claim:
A method for joint welding a shaft, particularly for a turbine and/or a generator, comprising: providing shaft parts, symmetrical about and coaxial along a vertical rotational axis, including at least two hollow cylinders; positioning two of the shaft parts coaxially to each other along the vertical rotational axis, with annular surfaces of two hollow cylinders abutting each other; forming a tubular inner radial annular seam to weld together the two hollow cylinders in a radial inner region of the annular surfaces by narrow-gap tungsten inert gas arc welding; and forming a tubular outer radial annular seam after said forming of the tubular inner radial annular seam to further weld together the two hollow cylinders in an outer radial region of the annular surfaces by narrow-gap metal gas-shielded arc welding, while the vertical rotational axis remains vertically aligned.