Also known as prefabricated insulation pipes are divided into two types: plastic jacketed steel insulation pipe (high density polyethylene directly buried insulation pipe) and steel sleeve steel insulation pipe (high temperature steam insulation pipe). Directly buried steel sleeve steel steam insulation pipe market present situation steel sleeve steel steam insulation pipe is a new laying technology in underground directly buried pipe, insulation adopts advanced high temperature centrifugal glass wool and outer protection pipe adopts FRP winding technology, a new generation of prefabricated directly buried steel sleeve steel steam insulation pipe series products are produced, which are suitable for conveying steam or other heat media below pressure. Internal sliding type: the thermal insulation structure is composed of working steel pipe and aluminum silicate.
2. External sliding type: the thermal insulation structure is composed of working steel pipe, glass wool thermal insulation layer, aluminum foil reflective layer, stainless steel fastening steel belt, sliding guide bracket, air insulation layer, external steel pipe and external anti-corrosion layer. The overall project cost of steel sleeve steel insulation pipe is very low, because the construction and installation process is very simple, and the overall cost is not very high. If the construction process can control the cost, it can be greatly increased by using *. The overall use cost can also be controlled, too much cost can be avoided, no construction pressure will be caused at all, and the heat loss can be greatly reduced. This will also play a good role in promoting energy conservation.
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Corrosion steel pipe, prolong the service life of steel pipe. two。 External steel pipe protection: protect the insulation layer from groundwater erosion, support the working pipe and withstand a certain external load to ensure the normal operation of the working pipe. 3. Polyurethane foam layer: ensure the medium temperature and keep the surface of the outer protection tube at room temperature. 4. Barrier and reflection layer: ensure that the organic foam material does not enter the inorganic hard high temperature resistant layer; reflect part of the heat of the high temperature resistant layer. 5. Inorganic hard insulation layer: high temperature resistance, ensure the interface temperature between the inorganic hard insulation layer and the organic insulation layer, and ensure that the foam is not carbonized. 6. Drag reduction layer: ensure that the working steel pipe expands and shrinks in heat. 7. Working steel pipe: ensure the normal flow of the conveying medium. Steel sheathed steel steam insulation pipe is composed of external steel pipe plus steel pipe anti-corrosion, polyurethane foam insulation layer and internal working steel pipe. Steel sleeve steel steam composite insulation pipe is suitable for transportation.
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Directly buried “steel sleeve steel” pipe, especially when the temperature of the conveying medium is higher than 130℃, its protruding feature is that the pipeline must almost achieve “zero maintenance”, so it puts forward higher requirements for engineering design, pipe fittings manufacturing and pipeline construction. The core pipe (working pipe) needs to be bottomed by argon arc welding and covered by manual arc welding. A new design of directly buried steel sleeve steel insulation steel pipe construction technology and 100% radiographic maintenance, the weld quality must reach the corresponding level of scale. It is also possible to produce displacement.
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Tianzhu steel sleeve steel steam insulation pipe per meter price supports the working pipe and can withstand a certain external load to ensure the normal operation of the working pipe. Anti-corrosion coating: protect the outer steel pipe from corrosion and prolong the service life of the steel pipe. Drag reduction layer: ensure that the working steel pipe expands and shrinks in heat. External protection of steel pipe: to protect the insulation layer from groundwater erosion, the pipe ends are sealed with polyethylene film or three-layer PE cold winding tape to prevent moisture or water during construction before installation.