Temperature requirements for the construction of hot water insulation pipes

The material used for the hot water insulation pipe is the current international thermal insulation material with excellent performance, which is twice that of the extruded board and more than 3 times that of the polystyrene board. The following hot water insulation pipe manufacturers - let's introduce the temperature requirements for the construction of hot water insulation pipe ppr pipe:

       The hot water insulation pipe process adopts on-site foaming technology. The construction site has relatively high requirements on external conditions such as temperature, humidity, and wind power. The following aspects need to be paid attention to:

       Hot water insulation pipe: 1. Temperature factor: When spraying, the temperature of the site and the surface temperature of the substrate to be sprayed should be within 15 ℃ ~ 35 ℃. If the temperature is too low, the adhesion between the polyurethane foam and the substrate will be low, and the density of the sprayed rigid foam product will increase significantly; if the temperature is too high, the consumption of the foaming agent will be too large, which is uneconomical.

        Hot water insulation pipe: 2. Substrate surface factors: Polyurethane rigid foam is a polymer product formed by a two-component mixing reaction of isocyanate and combined polyether, in which the isocyanate component can easily react with water to form urea, if the urea bond in the polyurethane When the content increases, the foam will become brittle, and the adhesion between the foam and the substrate will be reduced. Therefore, the surface of the substrate to be sprayed is required to be clean and dry, and it is required to be free of rust, dust, stain and moisture. Any dew or frost should be removed and dried.

        Hot water insulation pipe: 3. Wind factor: When spraying homework, the wind speed is required to be below 5m/s. Because the wind speed exceeds 5m/s, the heat generated by the reaction will be blown away, and even the rapid foaming reaction of the polyurethane foam will be affected, making the surface of the product brittle. At the same time, because the spray foaming machine mixes the raw materials and sprays them in an atomized state, if the wind speed is too large, the atomized particles will be blown away, increasing the consumption of raw materials and pollution.