Bury formula feedwater socket joint formula welding steel pipe

The utility model belongs to the technical field of pipe connection structure, especially, relate to a bury formula feedwater socket joint formula welding steel pipe, including tube end and interface, tube end's internal diameter is greater than the external diameter of interface, the interface inserts tube end, be equipped with two mounting grooves on tube end's the internal surface, the embedding has O type rubber ring in every mounting groove, form the sealed form of double -seal ring, O type rubber ring and mounting groove interference fit, be equipped with pressure testing copper nozzle between the two O type rubber rings, be equipped with nylon locking stick between tube end and the interface, and through the fastening of nylon locking stick, be equipped with the metal protection cap on the pipe wall of steel pipe, the metal protection cap passes through wire ground connection, and the metal protection cap is equipotential connection with the steel pipe outer wall, the steel pipe inner wall is equipped