Pressure vessel girth welding device

The utility model relates to the technical field of girth welding, and discloses a girth welding device for a pressure vessel, which is characterized in that a welding head is connected with a lifting assembly, a bearing assembly is mounted on the upper side of a conveying assembly, moves along with the conveying assembly in the direction close to or far away from the welding head, and is arranged on the lower side of the welding head; the top of the bearing assembly is provided with a containing part used for containing the pressure container, and the bearing assembly is further provided with a driving part used for driving the pressure container to rotate. The pressure vessel centering device can stably drive pressure vessels to rotate, so that stable girth welding is guaranteed, relatively speaking, the function is more complete in use, meanwhile, a worker only needs to control rotation of the carrier plate to adjust the vertical height of the pressure vessels, centering of the two pressure vessels can be