Polyurethane Continuous Separate Spray Winding Production Line

The spray winding insulation pipe is composed of steel pipe (working pipe) for transmission medium, polyurethane rigid foam (insulation pipe), and high-density polyethylene outer casing (outer sheath). Polyurethane spraying uses urethane spraying equipment to continuously spray the evenly mixed polyurethane raw materials on the outer surface of the steel pipe to form a polyurethane thermal insulation layer. Polyethylene winding uses extrusion equipment to continuously wind the molten polyethylene sheet outside the polyurethane thermal insulation layer. Surface, the process of forming a continuous and dense polyethylene outer sheath. Because of its low heat loss, good anti-corrosion and insulation performance, fast and safe construction, etc., it is widely used in liquid and gas transportation pipe networks, central heating networks, and is recognized as an environmentally friendly and energy-saving product. Polyurethane direct buried thermal insulation pipe is suitable for thermal insulation and cold insulation projects of various media in the range of -50 C to 150 C. Prefabricated directly buried thermal insulation pipes not only have advanced technology and practical performance that are difficult to compare with traditional trenches and overhead laying pipes, but also have significant social and economic benefits, and are also a powerful measure for heating and energy saving.