Corrosion pipe insulation is a function of the steel pipe with corrosion, and has excellent thermal insulation function, been widely used in the construction and implementation of construction, and constantly improve and spread. Corrosion pipe insulation have different types of processing and approaches, different ways to determine the steel processing have different functions and function, and use range also changes. The production of anti-corrosion pipe insulation need be produced in accordance with national norms, not the same way to comply with the norms of the processing is not the same, but have produced national norms fit, but also to comply with and strictly fulfilled. A steel sleeve steel steam pipe insulation First layer: steel layer based on job planning and customer demand usually chosen seamless (GB8163-87) spiral pipe (GB9711-88; SY / T5038-92) and Longitudinal (GB3092- 93). After the appearance of the leading steel pipe shot blasting technical processing, steel rust rating up to GB8923-1988 specification Sa2 level, look roughness up GB6060.5-88 specification R = 12.5 m. Second layer: polyurethane foam insulation with high-pressure steel pipe machine in the cavity between the outer protective layer of write-once made of rigid polyurethane foam liquid. Commonly known as "pipe-in-pipe foam technology." First, the effect of water, the second is the insulation, the third is to support the weight of the heat network. When the delivery medium temperature: -50 ℃ - 120 ℃, the selection of a rigid isocyanurate foam polyaminocarboxylic do insulation. The third layer: high-density polyethylene protective layer thickness must be preformed black (yellow) plastic pipe, the effect of one layer of polyurethane insulation protection against mechanical hard object damage, and second, anticorrosion and waterproof. Parameter Standard: OD mm 238 mm 3.5 weight Kg 2.475 wall thickness deviation mm ± 0.28 corresponds promise pipe diameter corresponding to the insulation thickness mm 159 mm 37 mm 245 correspond sleeves Features: 1, decrease the project cost. 2, low heat loss and save energy. 3, corrosion resistance, good insulation function, use long life. 4, small footprint, and fast construction, favorable environmental protection. By the transport medium, working pipe, foam insulation, polyethylene plastic outer sheath tube, followed by combination of equipment out of the first layer: Working pipe layer according to the design and requirements of customers generally use seamless (GB8163-87) spiral welded pipe (GB9711-88; SY / T5038-92) and Longitudinal (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 m. Second layer: polyurethane foam insulation with high-pressure steel pipe machine in the cavity between the outer protective layer is formed of a one-time injection of rigid polyurethane foam liquid from. Commonly known as "pipe-in-pipe foaming process." First, its role waterproof, and second, the insulation, the third is to support the weight of the heat network. When the transmission medium temperature: -50 ℃ - 120 ℃, the selection of rigid foam made polyaminocarboxylic isocyanurate insulation. The third layer: high-density polyethylene protective layer of a certain thickness prefabricated black (yellow) plastic pipe, its effect one protection against mechanical hard polyurethane insulation material damage, and second, anticorrosion and waterproof. Specifications: OD mm 238 mm 3.5 Weight Kg 2.475 wall thickness tolerance mm ± 0.28 corresponds to a corresponding pipe diameter mm 159 mm 37 corresponds to the thickness of the insulation sleeve mm 245 Features: 1, lower project cost. 2, low heat loss and save energy. 3, anti-corrosion, insulation performance, long service life. 4, small footprint, and fast construction, favorable environmental protection.