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Youcheng introduces that the higher the ripening temperature of the specification of Hebei polyurethane thermal insulation pipe, the shorter the time required. In the “steel sleeve steel” directly buried steam pipe, the guide bracket is usually used in the straight pipe section where the elbow, bend angle and other parts are changed, and the guide bracket is used to limit the movement space of the working steel pipe in the outer cover steel pipe. it prevents the radial displacement of the working steel pipe, so that the working steel pipe can only expand freely along the axis of the pipe. This anti-corrosion and thermal insulation method of thermal insulation steel pipe can be overhead or buried in the ground, and the whole construction process can be carried out on site, which is convenient for construction and operation, and is easy to be controlled by construction personnel, and the process is relatively simple.
The length of the sleeve wire varies according to the use of the pipe fittings, but one thing is the same, that is, the silicone rubber touch between the end face and the root of the pipe must be ensured, and the secondary seal must be formed. The piping device of working pressure ≥ is applicable, and the advantage of wire buckle connection lies in its low cost, simple and convenient operation, but it is easy to be limited by caliber. Flange connection is a kind of connection method with relatively good sealing, but because of its good cost, it has been gradually replaced by other connection methods and is often used in chemical industry. Polyurethane foam distribution insulation and waterproof performance is a necessary performance of directly buried heating pipeline, so waterproof treatment is very important for the installation of heating pipeline. For directly buried heating pipelines, there are many parts to do a good job of flooding water treatment, such as valves, drainage devices, etc., otherwise groundwater will enter into the well chamber, valves and other devices will be seriously eroded, thus affecting the heating effect of directly buried heating pipelines. Usually.
“Technical specification for directly buried steam pipes for heating in cities and towns: steel sleeve steel steam directly buried prefabricated insulation pipe, steel sleeve steel insulation pipe insulation structure is divided into: inner sliding type and external sliding type according to sliding mode: thermal insulation structure is composed of working steel pipe, aluminum silicate, drag reduction layer, microporous calcium silicate, thermal insulation layer, stainless steel fastening steel strip, aluminum foil reflection layer, polyurethane insulation layer, jacket steel pipe, external anti-corrosion layer. External sliding type: the thermal insulation structure is composed of working steel pipe, glass cotton thermal insulation layer, aluminum foil reflective layer, stainless steel belt, sliding guide bracket, air insulation layer, external steel pipe protection layer and external anti-corrosion layer. Changed the traditional trench laying heating pipe “wet cotton-padded jacket” situation, greatly reduced the overall heat loss of the heating pipe, the heat loss of the heating network is 2%, less than 10% of the standard requirements.
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Mancheng prefabricated directly buried steel sleeve steel insulation pipeline regular-running water pipeline in urban central heating in China, the hot water produced by the heat source and steam are transported to various heat users through the pipeline to form a heat network. In the process of transferring heat from the heat source to the heating system of each user, because the temperature of the heat medium in the pipe is higher than the surrounding ambient temperature, there is a certain heat loss along the way of the heating pipeline. Therefore, the heat preservation work is of great significance to ensure the quality of heating, energy saving and emission reduction.
Steam directly buried pipe steel sleeve steel steam insulation pipe in use, because it is under the ground, the waterproof function and anti-corrosion function are relatively good, but also can be opposed to the external mechanical strength is relatively large. 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 strip, sliding guide bracket, air insulation layer, external steel pipe and external anti-corrosion layer. Of course, no matter whether the price of thermal insulation pipe is high or low, the role it plays in our daily life can not be ignored, so this kind of thermal insulation pipe in our life. The “economic thermal insulation thickness” is to comprehensively consider the two factors of the pipeline thermal insulation structure and the annual operation cost of the pipeline heat dissipation loss, and calculate the insulation thickness of the “annual calculation cost” within a certain number of years.
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