The PU insulated pipe we know is a high-performance pipeline transportation and insulation material. It has outstanding thermal insulation, waterproofing and anti-corrosion, and safe long-term service performance. All of this, besides the application of the PU insulation layer, also depends on surface rust-prevention treatment.

　　Anti-rust treatment makes the pipe more waterproof and corrosion-resistant. Today we discuss how to apply anti-rust treatment to PU insulated pipe.

　　Surface treatment of PU insulated pipe is mainly mechanical and includes both air-blast cleaning and centrifugal shot blasting. Air-blast cleaning uses air and high-pressure water through a dedicated nozzle to drive abrasive at high speed so that it impacts and abrades the steel surface, removing rust, mill scale, contaminants, and deposits. After cleaning, the steel does not change color and a suitable cleanliness and roughness are obtained. For boiler and petrochemical machinery plants with high steel consumption, centrifugal shot blasting is typically used: under the action of high-speed rotating impeller blades, abrasive is thrown onto the steel surface with high radial and tangential velocity to remove impurities.

　　In addition, we can also use high-pressure water cleaning, high-pressure water with sand cleaning, and other methods. These methods have good cleaning effects, high efficiency, and significant overall economic benefits. They can effectively extend the service life of direct-buried insulated pipes, and therefore have developed very rapidly in recent years.

　　Therefore, remember to apply anti-rust treatment to PU insulated pipe to extend its service life.