that the temperature of grouting into the sleeve is not less
According to the different sliding mode, the thermal insulation structure of steel sleeve steel steam insulation pipe is divided into the following two categories: 1. Internal sliding type: the thermal insulation structure is composed of working steel pipe, aluminum silicate, drag reduction layer, microporous calcium silicate, heat insulation layer, stainless steel fastening steel strip, aluminum foil reflection layer, polyurethane insulation layer, outer steel pipe and external anti-corrosion layer. 2. The external sliding 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. Polyurethane insulation pipe is widely used in liquid and gas transportation pipe network, chemical pipeline insulation engineering, petroleum, chemical industry, central heating, air conditioning and ventilation ducts, municipal engineering and so on.
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What truly sets bags designed for women in business apart is their meticulous attention to detail and organizational features. Modern bags offer numerous compartments, padded sleeves, and dedicated sections for laptops, tablets, smartphones, and documents. These features enable women in business to keep their essentials neatly organized, providing easy access when required.
Zhidan polyurethane directly buried thermal insulation pipe factory construction polyurethane directly buried thermal insulation pipe chemical stability, can withstand the erosion of most acids and bases, insoluble in general solvents at room temperature, low water absorption, but because it is a linear molecule can slowly dissolve in some organic solvents, and does not occur swelling, excellent electrical insulation performance. A brief analysis of the structural characteristics of the plastic sleeve steel directly buried insulation pipe 9. The pipe valve adopts flanged non-disk root globe valve, the valve must be insulated, its surface temperature is not more than 60 degrees, and sealing measures should be taken at the thermal insulation end of the pipe connected with the valve. Analysis of the structure and characteristics of polyurethane thermal insulation steel pipe structure of polyurethane thermal insulation steel pipe: (1) core pipe: working steel pipe for conveying steam. (2) Insulation layer: rigid polyurethane foam is used. If the temperature is high, the chemical reaction will be carried out quickly and the foam will be cured quickly.
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Mixer thermal insulation: wrap the fuselage and seal with fiber thermal insulation felt; grouting tank thermal insulation: wrap the fuselage and top cover with fiber thermal insulation felt; grouting pipeline thermal insulation: wrap the pipe with fiber thermal insulation felt to reduce the heat loss of grouting material in the grouting pipe, ensure that the temperature of grouting into the sleeve is not less than 5 ℃, and prolong the working time of grouting material. Water temperature of mixing slurry: the water temperature of mixing slurry is controlled between 0 ℃ ~ 10 ℃ to ensure the temperature of grouting material; material heating and heat preservation measures: due to the proportion of 100kg mortar: 12kg water mixing slurry during construction, it is difficult to ensure that the initial temperature of grouting material can reach the expected temperature only by raising the water temperature. The material needs to be preheated in advance. Preheating method: put it on a closed warehouse or working face with positive temperature. All materials must be placed in an environment above 5 degrees for more than 48 hours before they can be used as grouting.
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