Describe the anticorrosive technologies used in the rapid installation of aluminum alloy pipelines

Quick installation of aluminum alloy pipeline is not clear enough to analyze the components and magazines of the conveying medium, and the lack of necessary magazine cleaning equipment leads to serious erosion of vulnerable parts of the pipeline, which shortens the life of the pipeline, and leads to valve, equipment and other faults, damage and leakage. The design pressure of the pipeline was increased without considering the actual conditions such as the quality of the pipe and the construction level.

Without considering the temperature compensation or air compressor piping insulation design is not in conformity with the requirements of making pipes and its accessories in the temperature difference between (design temperature and actual temperature difference) constantly scale changes frequently, causing pipes, joint fatigue failure to accelerate and shorten the pipeline to use fixed number of year, and lead to the flange joint bolt fracture, gasket damage and leakage.

Flanges, gaskets and bolt combinations connected to transmission machinery or vibrating equipment do not allow for leakage due to vibration failure. Lack of necessary protection devices, such as safety valve, automatic cut-off valve, so that the air compressor pipeline overpressure can not automatically relieve pressure, resulting in downstream pipeline damage and user equipment damage.

There are more and more kinds of anti-corrosion coating for aluminum alloy pipeline in dalian. Asphalt insulation layer, polyethylene tape, plastic film coating, phenolic foam resin plastic insulation layer has been widely used. In addition, there are rare earth aluminum anticorrosive materials, its performance is better, can adapt to a worse environment.

In terms of preventing electrochemical corrosion, impressed power cathode protection and sacrificial anode protection can be applied to better protect air compressor pipeline. In terms of preventing underground stray current corrosion, in addition to increasing circuit resistance (that is, adding anti-corrosion insulation layer), cathodic protection and sacrificial anode protection, the discharge protection method can also be used. In terms of anti-corrosion detection, the whole pipe network should be tested regularly, and the detection density of the pipe segment that has been leaked due to corrosion should be increased.