What is the burying technology of steel sleeve steel?
Steel casing steel burying technology is a brand-new burying technology and a major breakthrough in the field of steel casing direct burying technology. This technology is suitable for use in areas with high groundwater levels.
1 It has the technical advantages of waterproof, leak-proof, impermeable, pressure-resistant and fully enclosed. The steel sleeve steel direct-buried insulation pipe is composed of three layers: the steel pipe for conveying the medium, the outer steel pipe for anti-corrosion and support, and the ultrafine glass wool filled between the conveying steel pipe and the outer steel pipe. The filler can also be graphite, Silicate tile shell or polyurethane foam.
2Steel-steel steam direct-buried prefabricated thermal insulation pipe is suitable for conveying steam or other high-temperature media below 2.6mpa, 360 degrees Celsius Jiashan bearing degree, because its outer sheath is composed of steel pipes, not only has high strength, easy construction and maintenance, and is not easy to damage , And the service life is longer.
3 Strictly prevent the reliability of groundwater infiltration is the primary problem faced by directly buried pipelines. In addition, the excellent mechanical strength is also a problem that cannot be ignored for directly buried pipelines. Because the outer supporting steel pipes are connected by welding, the steel sleeve steel direct-buried thermal insulation pipeline has excellent sealing performance, and the robustness of the outer sheath steel pipe ensures the normal operation of the steel sleeve steel direct-buried pipeline in areas with high groundwater levels.
4 Steam insulation pipes are widely used in liquid and gas transportation pipeline networks, chemical pipeline insulation projects, petroleum, chemical, central heating networks, central air-conditioning ventilation pipes, municipal engineering, etc. The insulation structure of steel sleeve steel insulation pipe is divided into different sliding methods: internal sliding type and external sliding type 1, internal sliding type: the insulation structure is composed of working steel pipe, aluminum silicate, drag reduction layer, microporous calcium silicate, and heat insulation layer. , Stainless steel fastening steel strip, aluminum foil reflective layer, polyurethane insulation layer, outer steel pipe, and outer anti-corrosion layer. 2. External sliding type: the heat preservation structure is composed of working steel pipe, glass wool heat preservation and heat insulation layer, aluminum foil reflection layer, stainless steel fastening tape, sliding guide bracket, air heat preservation layer, outer protection steel pipe, and outer anti-corrosion layer.
A. Anti-corrosion layer: protect the outer steel pipe from corrosion of the steel pipe and extend the service life of the steel pipe.
B. Outer-protected steel pipe: Protect the insulation layer from groundwater erosion, support the working pipe and can withstand a certain external load, and ensure the normal working of the working pipe.
C. Polyurethane foam layer: to ensure the temperature of the medium, to ensure that the surface of the outer protective tube maintains a normal temperature.
D. Barrier and reflective layer: to ensure that the organic foam material does not enter the inorganic hard high temperature resistant layer; it reflects part of the heat of the high temperature resistant layer.
E. Inorganic hard insulation layer: high temperature resistance, to ensure the interface temperature with the organic insulation layer, to ensure that the foam is not carbonized.
F. Drag reduction layer: to ensure the free movement of the working steel pipe during thermal expansion and contraction.
G. Working steel pipe: to ensure the normal flow of the conveying medium.