What is the composition and structure of the black jacket insulation pipe?
Black jacket insulation pipe includes spiral steel pipe, straight seam steel pipe and seamless steel pipe. The outer layer of black polyethylene material is called black jacket insulation pipe. A high-pressure foaming machine is used to inject rigid polyurethane foam plastics into the cavity formed between the steel pipe and the outer cover at one time, and then polyethylene is used to stop the disposal of the outer surface of the steel pipe to form the outermost maintenance layer.
Polyethylene shell, directly buried thermal insulation pipe, high density polyethylene insulation pipe, directly buried precast insulation pipe, is tightly combined with the steel pipe, polyurethane rigid foam insulation layer and high density polyethylenes coat pipe. The directly buried insulation pipe is mainly used for the urban central heating network, the oil delivery pipeline, the high cold area water delivery pipeline and the industrial pipeline project in the production area. Because the polyurethane rigid foam insulation layer is tightly bonded to the outer skin of the steel pipe, the infiltration of air and water can be isolated, and good anticorrosion effect can be achieved. At the same time, its foaming holes are closed and its water absorption is very small. High density polyethylene shell and FRP shell have good anti-corrosion, insulation and mechanical functions.
The outer layer of black polyethylene material is called black jacket insulation pipe. A high-pressure foaming machine is used to inject rigid polyurethane foam plastics into the cavity formed between the steel pipe and the outer cover at one time, and then polyethylene is used to stop the disposal of the outer surface of the steel pipe to form an outer maintenance layer. Polyethylene shell, directly buried thermal insulation pipe, high density polyethylene insulation pipe, directly buried precast insulation pipe, is tightly combined with the steel pipe, polyurethane rigid foam insulation layer and high density polyethylenes coat pipe. The directly buried insulation pipe is mainly used for the urban central heating network, the oil delivery pipeline, the high cold area water delivery pipeline and the industrial pipeline project in the production area. Because the polyurethane rigid foam insulation layer is tightly bonded to the outer skin of the steel pipe, the infiltration of air and water can be isolated, and good anticorrosion effect can be achieved. At the same time, its foaming holes are closed and its water absorption is very small. High density polyethylene shell and FRP shell have good anti-corrosion, insulation and mechanical functions.
The vacuum layer outside the polyurethane direct buried pipe plays an important role in the thermal insulation data. The vacuum layer is applied to the large thermal insulation data. It is a new design technology with excellent application effect. When the polyurethane buried pipe is in use, the rational application outside the vacuum layer will be shown as a better application form. The disposal of the external vacuum layer is to make the temperature lose insulation. Because the vacuum layer is inside the polyurethane, it is very difficult to penetrate the temperature from the outside of the polyurethane data.
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