UHMW-PE composite pipe is composed of UHMWPE pipe(UHMWPE Mining pipe、UHMWPE Dredge Pipe、UHMWPE Roller Pipe) and carbon steel pipe by scientific technology. It is characterized in that a steel pipe with a flange as an outer layer of a reinforcing protective layer, and UHMW-PE is used as an inner layer of a base pipe material, and the two characteristics are combined into one. For the weakest link (the easiest leak slurry) of the UHMW-PE high pressure pipe, which is located between the steel pipe and the welding flanges, our company in the whole process according to the national standard welding technology implementation, using domestic advanced flat welding flange fast alignment machine, to achieve the fast formation and spot welding of the steel pipe and protruding belt diameter flat welding flange, which improves the efficiency and quality of steel pipe and flange formation, and ensures that the horizontal plane of the steel pipe is 90 degrees from the flange…