Derusting Method of Seamless Steel Pipe

1. Hand Tools: For small scale rust removal, hand tools such as wire brushes, sandpaper, or steel wool can be used to manually scrape off the rust.

2. Power Tools: Angle grinders, sanders, or wire brushes attached to drills can be used for more efficient rust removal on larger surfaces or more stubborn rust.

3. Chemical Derusting: Chemical strippers or rust removers can be used to dissolve the rust. These chemicals are usually applied to the surface of the pipe and allowed to sit for a period of time before being rinsed off.

4. High-Pressure Water: High-pressure water hoses can be used to blast away rust, particularly if the rust is loose and not too deeply embedded in the surface.

5. Acid Etching: For thorough rust removal, a weak solution of phosphoric acid or muriatic acid (commonly known as hydrochloric acid) can be used to etch the surface of the pipe and dissolve the rust. After etching, the pipe must be rinsed and neutralized to remove any remaining acid.

6. Vibratory or Rotary Equipment: Pipes can be placed in vibratory or rotary tumblers with abrasive media to remove rust and scale mechanically.

7. Welding Rods: In some cases, a small amount of acetylene gas can be used to heat the pipe to a temperature where the rust oxidizes and falls off, followed by scraping with a wire brush.

8. Salt Bath Nitrocarburizing: This is a heat treatment process that can both remove rust and improve the pipe's surface hardness and wear resistance.