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igh-density polyethylene seamless outer protective pipe prefabricated directly buried thermal insulation pipe fittings are a trinity structure in which steel pipe fittings, thermal insulation layer and seamless outer protective pipe are closely combined, and supports and signal lines can be set in the thermal insulation layer.
High-density polyethylene seamless outer protective pipe prefabricated directly buried thermal insulation pipe fittings are a trinity structure in which steel pipe fittings, thermal insulation layer and seamless outer protective pipe are closely combined, and supports and signal lines can be set in the thermal insulation layer.
High-density polyethylene seamless outer protective pipe prefabricated directly buried thermal insulation pipe fittings are a trinity structure in which steel pipe fittings, thermal insulation layer and seamless outer protective pipe are closely combined, and supports and signal lines can be set in the thermal insulation layer.
High-density polyethylene seamless outer protective pipe prefabricated directly buried thermal insulation pipe fittings are a trinity structure in which steel pipe fittings, thermal insulation layer and seamless outer protective pipe are closely combined, and supports and signal lines can be set in the thermal insulation layer.
Galvanized iron sheet overhead polyurethane prefabricated direct buried insulation pipe is mainly suitable for hot water, steam, cold water and other non-corrosive medium transmission, medium temperature range of minus 10 ℃ to zero 130 ℃.
"Polyurethane sprayed polyethylene winding prefabricated direct buried insulation pipe" is composed of working steel pipe, sprayed polyurethane insulation layer and extruded polyethylene outer protection layer. The thickness of the insulation layer and the thickness of the outer protective layer can be adjusted within a certain range according to the needs during production. Quantitative production can be carried out according to the parameters of the central heating and cooling medium and the thickness of the insulation layer required by the actual heat dissipation loss to meet the needs of different projects.
External sliding steam insulation pipe and internal sliding steam insulation pipe are used in China. The outer sliding structure of steel sleeve is more reliable than the inner sliding structure in design theory, the force analysis is simple, the internal air layer is easy to set up, and the moisture drainage is better. The outer sliding structure is basically adopted in foreign countries, which has been gradually recognized by everyone in China.
"High density polyethylene outer protective pipe polyurethane foam prefabricated directly buried insulation pipe" is widely used in urban central heating and cooling fields. Can be used to transport long-term operating temperature is not higher than 130 ℃ hot water, hot oil, cold water and other media. It has the characteristics of good heat preservation effect, small occupied area, low engineering cost, long service life and convenient installation. The directly buried insulation pipe is closely combined with the working steel pipe (core pipe) for conveying medium, polyurethane insulation layer and polyethylene outer protection pipe. The working steel pipe adopts seamless steel pipe, spiral seam steel pipe and straight seam steel pipe conforming to the national standard or the standard of the Ministry of Petroleum. The polyethylene outer protective pipe is made of high density polyethylene resin, which has high mechanical strength and excellent corrosion resistance. The polyurethane insulation layer material is polyurethane foam with a core density of not less than 60kg/m3, and the foam completely fills the gap between the working steel pipe and the polyethylene outer protective pipe, it is firmly bonded with the working steel pipe and the outer protective pipe to ensure that the working steel pipe, the polyethylene outer protective pipe and the polyurethane insulation layer form a solid whole.