The Welding Process of Tank Bottom Plate for 150000 m³ Double-Pontoon Floating Roof Oil Tank

In the light of the problems during the tank bottom plate welding of 150 000 m³ double-pontoon floating roof oil tank, the paper analyzes the deformation cause of tank wall shell in welding. It is considered that the rational welding method and anti-deformation measures can effectively avoid the stress concentration of tank wall shell and ensure welding quality.