Inner-coated stainless steel water-purifying pipe

A lining stainless steel water purification pipe includes a pipe body and a sealing connecting pipe part. The utility model is characterized in that (1) the pipe body of the water purification pipe is a composite pipe with external layer welded with steel pipe and internal layer lined with stainless steel pipe; the external surface is coated with the anti-corrosive coat and the end is provided with an external screw thread; (2) the sealing connecting pipe part consists of a connecting pipe part, a stainless stele retaining ring and a silicon rubber sealing ring; both ends of the connecting pipe part are provided with internal screw threads matched with the external screw threads of the end of the composite pipe; the tail of the internal screw thread of the connecting pipe part forms a ring-shaped sidestep; (3) the ring-shaped sidestep supports the stainless retaining ring; the silicon rubber sealing ring is arranged between the stainless steel retaining ring and the internal wall of the connecting pipe part; (4) when the internal screw thread of the connecting pipe part is screwed into the external screw thread of the composite pipe and is tightly screwed, the end surface of the composite pipe is right tightly pressed on the silicon rubber sealing ring, forming the dual layer sealing structure of external layer pipe screw thread sealing and the internal layer silicon rubber sealing ring sealing. The utility model has the advantages of no dirties, no pollution, anti-corrosion, reliable connection, high mechanism degree, no leakages, high-temperature resistance, etc.