Fire protection seamless steel pipes are hollow, joint-free steel tubes with excellent corrosion resistance.
Oxide scale and scale deposits may form after long-term operation. The standard cleaning process is as follows:
1. Pre-rinsing
Flush the pipes to remove sludge and dirt to improve pickling efficiency.
2. Pickling
Soak in acid solution statically for 2 hours, then circulate dynamically for 3–4 hours with forward/reverse flushing every 30 minutes. Reuse the acid if pH>2; otherwise neutralize and drain.
3. Alkaline cleaning
Circulate alkaline solution (NaOH, Na₃PO₄ and softened water) to neutralize residual acid and prevent corrosion.
4. Water rinsing
Rinse thoroughly with softened water for 30 minutes to remove all residues.
5. Recording & inspection
Record all operation time and check the final cleaning effect.
Regular maintenance ensures stable pipe performance. The above steps can effectively remove oxide scale and scale for daily upkeep.