It is composed of working steel pipes for conveying media, glass wool insulation layer, aluminum foil reflection layer, stainless steel fastening belt, sliding guide bracket, air insulation layer, external protective steel pipe, and external anti-corrosion layer, which are sequentially combined outward through the equipment.
The insulation structure of steel insulated pipes with steel sleeves can be divided into inner sliding type and outer sliding type based on different sliding modes
1. Internal sliding type: The insulation structure consists of working steel pipe, aluminum silicate, drag reduction layer, microporous calcium silicate, insulation layer, stainless steel fastening steel strip, aluminum foil reflection layer, polyurethane insulation layer, outer steel pipe, and external anti-corrosion layer (basically no longer used).
2. External sliding type: The insulation structure consists of a working steel pipe, a glass wool insulation layer, an aluminum foil reflection layer, a stainless steel fastening belt, a sliding guide bracket, an air insulation layer, an external protective steel pipe, and an external anti-corrosion layer.
1. Anti corrosion layer: protects the outer steel pipe from corrosive substances, prolongs the service life of the steel pipe.
2. External steel pipe: protects the insulation layer from groundwater erosion, supports the working pipe and can withstand certain external loads, ensuring the normal operation of the working pipe.
3. Glass wool insulation layer and air insulation layer: Ensure the medium temperature and keep the surface of the outer protective pipe at room temperature.
4. Aluminum foil reflective layer: ensure that the organic foam material does not enter the inorganic hard high temperature resistant layer; Reflect some heat from the high-temperature resistant layer.
5. Inorganic hard thermal insulation layer: resistant to high temperature, ensuring the interface temperature between organic thermal insulation layer and foam not to be carbonized.
6. Stainless steel fastening strap and sliding guide bracket: ensure the free movement of the working steel pipe during thermal expansion and contraction.
7. Working steel pipe: Ensure normal flow of conveying medium
