High-pressure-bearing gas storage steel cylinder and manufacturing process thereof

The invention provides a high-pressure-bearing gas storage steel cylinder and a manufacturing process thereof. The high-pressure-bearing gas storage steel cylinder comprises a steel cylinder overall structure, the steel cylinder overall structure comprises a steel cylinder bottom half body, a steel cylinder top half body and a cylinder body connecting ring, annular grooves are formed in the inner side of the top end of the steel cylinder bottom half body and the inner side of the bottom end of the steel cylinder top half body correspondingly, connecting inner threads are arranged on the surfaces of the annular grooves, connecting ring flanges are arranged on the left side and the right side of the cylinder body connecting ring, flange threads are arranged on the outer surfaces of the connecting ring flanges, the connecting ring flanges match the annular grooves, and the connecting ring flanges are connected with the annular grooves in a screwed mode through the threads. The cylinder body connecting ring is ad