When the insulation tube is expanded by heat, there must be a change in movement. It is also possible to produce displacement, and the thermal insulation structure layer and the outer casing are the whole structure, and the external fixation is that the working pipe and the external protection pipe are fixed together. At both ends of each section of the pipe and the compensator, two large reinforced concrete piers should be set up. This is good for the fixed pipeline, because the external fixation must be set up reinforced concrete piers, so the construction occupies a large area, large investment, and sometimes a long construction period. Therefore, it is better to pay attention to it before, according to the different external protection pipe you want to use, it can be divided into plastic sleeve steel structure, FRP sleeve steel structure and steel sleeve steel structure. It has been proved by practice that the plastic sheathed steel structure can no longer adapt to the development trend of steam insulation pipeline. ? Internal sliding external fixation
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Analysis of finished products of Taibai prefabricated directly buried steel sleeve steel insulation pipe anticorrosive coating: protect outer steel pipe from corrosion, prolong steel pipe service life, external protection steel pipe: protect insulation layer from groundwater erosion, support working pipe and be able to withstand certain external load, ensure normal operation of working pipe, polyurethane foam layer: ensure medium temperature, keep the surface of external pipe at room temperature, barrier 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, inorganic hard thermal insulation layer: high temperature resistance, ensure the interface temperature between the organic insulation layer and the organic insulation layer, ensure that the foam is not carbonized, drag reduction layer: ensure the thermal expansion and cold shrinkage of the working steel pipe.
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Jinzhou steam insulation pipe manufacturer steel sleeve steel composite insulation pipe can be prefabricated directly buried insulation pipe in order to have insulation effect on various pipelines, in order to better ensure the use effect, at the same time, it can prolong the service life of the pipeline, and can be more assured in the process of installation, so in the steps of selecting the manufacturer, there is no need to pay attention to the following problems In order to better help themselves to choose a suitable insulation tube. When the pipeline is working in heat transfer, the stress of the pipeline is zero with the increase of temperature. When the temperature continues to rise, the compressive stress of the pipeline generally increases. When the temperature rises to the working temperature, the compressive stress of the pipeline is still not enough. Uncompensated directly buried laying simply means that the prefabricated polyurethane insulation pipe does not have any compensation measures when it is heated, but depends on the strength of the pipe itself to absorb thermal stress.
Heating pipeline prefabricated plastic sleeve steel insulation steel pipe theoretical weight Yongjing (1) Polyurethane thermal insulation steel pipe working steel pipe: according to the technical requirements of the transport medium, sewn steel pipe, seamless steel pipe and double-sided submerged arc spiral welded steel pipe are used respectively.