Outer 3PE anticorrosion pipeline of interior epoxy of benefit is excused from a college course to anticorrosive coating in welding back

The utility model relates to an outer 3PE anticorrosion pipeline of interior epoxy of benefit is excused from a college course to anticorrosive coating in welding back at this end of body of pipeline inner wall compound two metallic structure in advance, and then carries out preserved handle, and anticorrosive coating, metallic structure, pipe wall are combined closely, forms one complete in succession, interior anticorrosive coating that the performance is unanimous, the outer 3PE anticorrosion pipeline of interior epoxy accomplishes welding construction back, internally the anticorrosive coating does not lead to the fact the influence, and does not need interior anticorrosive coating repair operation.