After the disposal and disposal of the insulation process, the temperature in the working steel pipe is guaranteed under the action of different working environment and external medium. Steel pipes whose external temperature meets or meets the application requirements.
What are the advantages of insulating steel pipes? Cathodic maintenance of directly buried insulating pipes is an electrochemical maintenance method in the process of metal corrosion protection. Unlike other anticorrosive processes of directly buried insulating tubes, he applied current to the maintained metal body, thus causing the electrode potential of the maintained metal body to shift negatively, which is the tendency of metal losing spontaneity. The attitude of changing from atomic state to ionic state. Basically suppress the occurrence of decaying candles. However, this process must be stopped in the electrolyte, so the embedded steel tube is suitable for cathode maintenance.
In addition, what are the defects of the insulation pipe? The cathode maintenance and the corrosion protection layer of the directly buried insulation pipe complement each other. The existence of anticorrosive coating can greatly reduce the current consumed by cathodic maintenance, and the cathodic maintenance can compensate for the lack of integrity of the anticorrosive coating, thus completing the successful separation of safety and economy.
Selection technology of heat preservation pipe 1: High temperature prefabricated directly buried heat preservation pipe is a kind of directly buried prefabricated heat preservation pipe, which has good heat preservation performance, safety and reliability, and low cost. It effectively deals with the problems of heat preservation, smooth sliding and waterproof of the exposed end of the prefabricated direct-buried heat preservation pipe for 130 C-600 C high temperature heat transfer in urban central heating.
High temperature prefabricated directly buried insulation pipe not only has advanced technology and applicability, it is difficult to compare with traditional trench and overhead pipeline laying, but also has remarkable social and economic benefits. It is also a powerful heating measure. And energy saving.
The selection technology of heat preservation steel pipe 2: because the rigid polyurethane foam insulation layer is tightly adhered to the steel tube epidermis, the air and water are separated from the surface, and good anticorrosive effect is achieved. At the same time, the foaming hole is blocked and the water absorption rate is small. High density polyethylene shell and FRP shell have good corrosion resistance, thermal insulation and mechanical properties. Therefore, the outer skin of the working steel pipe is hardly corroded by external air and water.
Selection Skills of Insulating Steel Pipe 3: Drainage pipe on steel casing can discharge moisture in time, and can also be used as alarm signal pipe for daily operation. High quality bellows compensator is used for heat compensation of pipeline. The device is directly buried in the casing. There is no need to set up inspection wells. The construction operation is convenient and the construction period is short. Suitable for delivering steam or other media below 2.5 MPa and 350 degrees Celsius. This product uses steel pipe as outer maintenance layer, which has the advantages of high strength, not easy to damage, simple construction and maintenance, and long service life.
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