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High temperature direct buried steam insulation (steel jacket steel)

One is composed of steel pipe for conveying medium, anti-corrosion outer steel pipe, and ultrafine glass wool filled between the steel pipe and outer steel pipe. It can also be composited by graphite, silicon-calcium tile shell and filled polyurethane foam. Steel casing (steel casing steel) embedding technology is a new waterproof, leak-proof, impermeable, pressure-resistant and fully enclosed embedding technology. It is a major breakthrough in the use of direct burial technology in areas with high groundwater levels.
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Product description
Parameters

High temperature direct buried steam insulation (steel sleeve steel): production and processing range φDN20—ΦDN1800

Executive standard

CJ/T200—2004 "Technical Conditions of Prefabricated Directly Buried Steam Insulation Pipe for Urban Heating"

One is composed of steel pipe for conveying medium, anti-corrosion outer steel pipe, and ultrafine glass wool filled between the steel pipe and outer steel pipe. It can also be composited by graphite, silicon-calcium tile shell and filled polyurethane foam. Steel casing (steel casing steel) embedding technology is a new waterproof, leak-proof, impermeable, pressure-resistant and fully enclosed embedding technology. It is a major breakthrough in the use of direct burial technology in areas with high groundwater levels. The primary problem of the protection tube of the directly buried pipeline is the reliability of tight waterproofing. In addition, it must have good mechanical strength. Due to the high strength of the steel casing, the welding connection is used, and the waterproof and sealing performance is very reliable. In addition, its high temperature resistance is also Unmatched by other external protection management institutions. In areas with high groundwater levels, in order to ensure that the groundwater does not affect the normal operation of the steam buried pipelines, the outer protective layer is best to use a solid and airtight steel pipe shell.

Insulation structure

According to different sliding methods, the insulation structure of steel sleeve steel insulation pipe is divided into internal sliding type and external sliding type.

1. Internal sliding type: the heat preservation structure consists 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 heat preservation layer, outer steel pipe, and outer anticorrosion layer composition.

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 anticorrosion layer.

Structural mechanism

1. Anti-corrosion layer: protect the outer steel pipe from corrosion of the steel pipe and prolong the service life of the steel pipe.

2. 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.

3. Polyurethane foam layer: to ensure the temperature of the medium, to ensure that the surface of the outer protective tube maintains a normal temperature.

4. 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.

5. 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.

6. Drag reduction layer: to ensure that the working steel pipe expands and contracts freely.

7. Working steel pipe: to ensure the normal flow of the conveying medium.

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