Buried prefabricated polyurethane insulation international standards

Prefabricated buried pipe insulation Description: prefabricated buried pipe insulation, also known as pre-heat pipe, is a good insulation properties, plus safe, reliable, low construction cost of prefabricated buried pipe insulation. Effective solution to the urban central heating in 130 ℃ -600 ℃ high temperature heat transport prefabricated insulating pipe insulation, sliding lubrication and waterproofing exposed pipe ends. Prefabricated buried pipe insulation / prefabricated pipe insulation not only has the traditional trench and overhead laying pipeline incomparable advanced technology, practical performance, but also has significant social and economic benefits, but also a powerful heating energy-saving measures. Prefabricated insulation parts are buried heating pipe technology, marking China heating pipes technological development has entered a new starting point. Prefabricated buried pipe insulation / prefabricated pipe insulation purposes: prefabricated insulating pipe fittings are widely used in liquid, gas pipeline network, chemical pipe insulation works in petroleum, chemical, central heating network, central air conditioning and ventilation pipes, municipal engineering. Prefabricated buried pipe insulation characteristics: heat pipe is made of prefabricated steel, glass steel jacket, fiberglass shell structure, characterized by: further comprising a heat insulation layer, a lubricating layer, elastomeric seals. The utility model prefabricated pipe insulation effectively solve urban central heating in 130 ℃ -600 ℃ high temperature heat transport with prefabricated buried pipe insulation / prefabricated insulating pipe insulation, sliding lubrication and waterproofing exposed pipe ends. Buried polyurethane insulation from the inside to the outside three layers structure - Langfang Venus Chemical Co., First layer: Working pipe layer according to the design and requirements of customers generally use seamless (GB8163-87) spiral 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 polyurethane foam has good mechanical properties and insulation properties, usually can be temperature 120 ℃, by modification or in combination with other insulation materials can be temperature 180 ℃. Buried prefabricated insulation than conventional types of pipe insulation has a very prominent advantages: 1, good insulation properties, heat loss is only 25% of the traditional pipe, long run can save a lot of energy, significantly reduce energy costs. 2, highly waterproof and corrosion resistance, without attached trench can be directly buried in the ground or water, construction easily and quickly, and lower total cost. 3, at low temperatures also have good corrosion resistance and impact resistance, and can be directly buried underground permafrost. 4, the service life of up to 30 - 50 years, proper installation and use can make the pipe network maintenance costs low. Buried polyurethane wound FRP winding FRP pipe outer protective layer is made of glass fiber reinforced resin wound, with high mechanical strength and excellent corrosion resistance, it can protect the tubes from the outside world in the transportation, installation and use of the process Factors causing damage.