Steel-jacketed steel direct-buried steam insulation pipe (steel-jacketed steel direct-buried steam insulation pipe) is composed of steel pipe, anti-corrosion coated steel pipe and superfine glass wool filled between steel pipe and coat.
According to different sliding modes, the thermal insulation structure of steel-jacketed direct-buried steam insulation pipe can be divided into internal sliding type and external sliding type.
Application:
Steel-jacketed steel direct-buried steam insulation pipe is widely used in liquid and gas pipeline network, chemical pipeline insulation engineering petroleum, chemical industry, central heating network, central air-conditioning ventilation pipeline, municipal engineering, etc.
Insulation, smooth sliding and waterproofing problems of directly buried steam insulation pipe with steel sleeve are exposed. Thermal insulation pipe not only has advanced technology and applicability which is difficult to compare with traditional trench and overhead pipeline laying, but also has remarkable social and economic benefits. It is also a powerful measure of heating energy saving.
Main Technical Performance Parameters of Direct Buried Insulation Pipe
Working steel pipe
Pipeline variety: seamless or spiral submerged arc welded steel pipe
Pipeline material: No. 10 or No. 20 steel
Implementation Specifications: GB/T8163-2008, GB/T9711
Thermal insulation layer
DATA VARIETY: Aluminum silicate medium and centrifugal glass wool composite
Normal temperature thermal conductivity: <0.045w/m.
Bulk density (dry): 100-150 kg/m3
Application Temperature: -40 ~800
Overcoat Steel Tube
Pipeline variety: spiral welded steel pipe
Pipeline Material: Q235-A(B)
Implementation Specification: T5037-2012
Technical characteristics of outer sliding structure:
1. Because there is an air layer between the insulation layer and the outer protective pipe, the water immersed in the pipeline during transportation and construction can be discharged during the gradual heating pipe process, so the fitting method is more suitable for areas with sufficient rainfall and high water level. However, for soils with relatively high contents of chloride and sulfur ions (especially in coastal areas), the corrosion prevention of external steel pipes needs to be enhanced.
2. The outer sliding structure is designed based on the idea of "steel trench". It can make full use of elbow to stop natural compensation, reduce the cost, and reduce the thrust of fixed pier.
3. If the pipeline is divided into several relatively independent parts at the fixed pier and two sets of tidal drainage pipes are installed between the two fixed piers (preferably two sets), the tidal drainage pipes can not only remove wet gas, but also serve as signal pipes for daily operation, and can monitor the operation of the pipeline network at any time.
4. External sliding structure can be changed into vacuum-pumping structure according to demand.
Characteristic:
1. Reduce the cost of construction.
2. Low heat loss and energy saving.
3. Anti-corrosion, good insulation performance and long service life.
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