The polyurethane spray anti-corrosion equipment designed by Huashida performs surface treatment on ductile iron pipes before polyurethane spray anti-corrosion. This treatment aims to improve the adhesion of the coating: heating to remove moisture, grinding to eliminate burrs, and external shot blasting to remove rust and impurities. Anti-corrosion treatment must comply with relevant technical standards and requirements. Therefore, during spraying, the coating material and cast pipes are preheated, and parameters such as temperature and pressure are set properly to guarantee the quality and uniformity of the coating. After spraying, the coating undergoes curing and inspection.
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