Insulation structure of steel insulating pipe can be divided into internal sliding type and external sliding type according to different sliding modes.
1. Inner sliding type: thermal insulation structure is composed of working steel pipe, aluminium silicate, drag reduction layer, micro-porous calcium silicate, thermal insulation layer, stainless steel fastening strip, aluminium foil reflective layer, polyurethane thermal insulation layer, coated steel pipe and external anti-corrosion layer.
External sliding type: thermal insulation structure consists of working steel pipe, glass wool thermal insulation layer, aluminum foil reflective layer, stainless steel fastening belt, sliding guide bracket, air thermal insulation layer, exterior steel pipe and exterior anti-corrosion layer.
The steel sleeve steel steam insulation pipe is from inside to outside: the work pipe: ensure the normal activity of the conveying medium; reduce the resistance layer: ensure the work pipe expands and shrink freely; the inorganic hard insulation layer: high temperature resistance, ensure the interface temperature between the organic insulation layer and ensure that the foam is not carbonized; barrier and reflective layer: ensure that the organic foam data do not enter the inorganic hard and high temperature resistant layer; reflection. High temperature resistant layer of local heat; polyurethane foam layer: ensure the medium temperature, ensure the external tube surface to adhere to the normal temperature; external protection steel pipe: maintain the insulation layer from open water corrosion, support the work pipe and accept certain external load, ensure the work of Guan Zhengchang work; anti-corrosion layer: protect the external steel pipe to prevent corrosivity corrosion steel pipe, prolong the service life of the steel pipe.
The components of steel-lined steel direct-buried insulation pipes are composed of steel pipes for medium delivery, anti-corrosion coated steel pipes, and ultra-fine glass wool for filling between steel pipes and steel pipes. Another way to synthesize steel sleeve steel directly buried insulation pipes is to use graphite and silicon calcium tiles, plus polyurethane foam for filling.
In fact, the first thing to do a good job of maintenance pipe is to do a good job of tight waterproofing of the pipe, and have good performance in mechanical strength. Because the steel casing is welded joints with high strength, the sealing performance of waterproofing is very high, and the other important thing is that its high temperature resistance is also not other external maintenance pipe can be used. By comparison.
Especially in areas with high open water level, it can operate normally. In the outer maintenance layer, a very consolidated and sealed steel tube shell is also used. The main function of the burying technology of steel-jacketed direct-buried insulating pipe is to do well in waterproof and leak-proof, and to be the best anti-seepage and anti-compression, or to be the fully blocked burying technology. This technology has a good effect in the areas with high open water level.
