Hebei Yanshan Song Xing Steel Pipe Co., Sales Manager: Shen Xiafei Tel; 18713766099 polyurethane pipe insulation, high-density polyethylene pipe insulation polyurethane foam, polyurethane foam pipe insulation from the transmission medium, the work of steel, foam insulation layer polyethylene plastic outer sheath tube, followed by combination of equipment out. The first layer of polyurethane insulation: Working pipe layer depending on the design and requirements of customers generally use seamless (GB8163-87) spiral welded pipe (GB9711-88; SY / T5038-92) and welded pipe (GB3092-93). Advanced steel surface after shot blasting process, steel rust rating up to GB8923-1988 standard Sa2 grade, surface roughness up GB6060.5-88 standard R = 12.5 microns. Second layer: polyurethane insulation in the cavity with a high pressure foaming machine steel tube between the outer protective layer is formed in a one-time injection of a rigid polyurethane foam stock solution is made. Commonly known as "pipe-in-pipe foaming process." First, its role waterproof, two insulation, three heating network is to support the weight. When the transmission medium temperature: -50 ℃ -120 ℃, the selection of rigid poly semicarbazide acetate foam insulation do. Third layer: high-density polyethylene protective layer of a certain thickness of precast black (yellow) plastic pipe, its role from one protective polyurethane insulation mechanical hard object damage, and second, anticorrosion and waterproof. Our products are widely used in electric power, chemical, pharmaceutical, oil refining, natural gas, shipbuilding, metallurgy, mining, heating, water treatment, environmental protection, piling, steel and many other industries. The company aims to: honesty and innovation as the first quality win and common development!