How to Remove Rust from High-Pressure Boiler Tubes

High-pressure boiler seamless tubes are mainly used to manufacture superheater tubes, reheater tubes, air guide tubes, main steam pipes, etc. for high-pressure and ultra-high-pressure boilers.

High-pressure boiler tubes are used under high temperature and high pressure conditions. Under the action of high-temperature flue gas and water vapor, the tubes will oxidize and corrode. Steel pipes are required to have high lasting strength, high resistance to oxidation and corrosion, and good structural stability. High-pressure boiler tubes are mainly used to manufacture superheaters, reheaters, water walls, economizers, etc. for supercritical or ultra-supercritical boilers.

Specifications: 8-1240×1-200mm
Manufacturing process: hot rolling, cold drawing, thermal expansion
GB3087-2008 - Chinese national standard
ASME SA106-------American Boiler and Pressure Vessel Code
ASME SA210 - American Boiler and Pressure Vessel Code
ASME SA213 - American Boiler and Pressure Vessel Code
DIN17175 - Federal German Industrial Standard

How to remove rust from high-pressure boiler tubes
Solvents and emulsions are used to remove oil, grease, dust, lubricants and other similar organic matter, but they cannot remove surface corrosion, oxide scale, solder, etc. of high-pressure boiler steel pipes. They can only be used as an auxiliary means for anti-corrosion production.

(2) Anti-rust treatment of special tools
Mainly use special tools such as steel brushes to remove surface damage, loose and shrinking dirt, rust, splashes, etc. of high-pressure boiler seamless steel pipes. The anti-rust treatment of hand tools can reach Sa2 level, and the anti-rust treatment of power tools can reach Sa level three. If there is strong dirt adhered to the surface of the high-pressure boiler seamless steel pipe, the anti-rust treatment effect of the tools will not be effective. Ideal, cannot reach the steel anchorage depth specified by FRP anti-corrosion

(3) Pickling
Generally, chemical and electrolytic methods are used for pickling. Pipe corrosion can only be treated by chemical pickling, which can remove scale, rust, and old coatings. Sometimes it can be used as sandblasting after rust treatment. Although chemical water treatment can make the surface clean and smooth to a certain extent, its anchor line is shallow and easy to be polluted.

(4) Anti-rust treatment of sprayer
The spray anti-rust treatment is a kind of high-power electrospray blade that rotates at high speed, so that wear-resistant materials such as emery sand, bearing steel balls, stainless steel wires, and minerals can spray (acupuncture points) on the surface of the seamless steel pipe under the action of centripetal force. It can not only Completely removes rust, metal oxides and stains, and can also damage and rub in high-pressure boiler seamless steel pipes to achieve the required uniform surface roughness.

After spraying (spraying) rust, it can not only expand the physical adsorption of the pipe surface, but also enhance the mechanical adhesion of the pipe surface. Therefore, sprayer anti-rust treatment is an ideal rust removal method for pipeline anti-corrosion. Generally speaking, spray anti-rust treatment is mainly used for surface treatment of high-pressure boiler steel pipes, and shot blasting treatment is mainly used for surface treatment of pipes.

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