Combined feedwater socket joint formula welding steel pipe

The utility model belongs to the technical field of pipe connection structure, especially, relate to a combined feedwater socket joint formula welding steel pipe, including tube end and interface, the boxing of interface outer wall has the ring of keeping off, it keeps apart the rubber packing ring to be equipped with between fender ring and tube end's the edge, keep off the ring, it is marginal through bolt fixed connection with tube end to keep apart the rubber packing ring, the lockhole has been seted up on the interface outer wall, the lockhole is located and keeps off between ring and the interface end, flaring department of tube end inner wall is equipped with the locking piece that corresponds with the lockhole, be equipped with the mounting groove on tube end's the internal surface, the embedding has the elastic sealant circle in the mounting groove, elastic sealant circle and mounting groove interference fit, the interface outer wall is equipped with the embedded groove, be equipped with a lock ring