JG/T 5011.12-1992 "General technical conditions for painting of construction machinery and equipment" is the construction industry standard, which stipulates the general technical requirements for painting of construction machinery and equipment. The content includes pre-painting substrate treatment (derusting, degreasing, surface roughness control), Coating performance indicators (adhesion, weathering resistance, corrosion resistance, gloss, etc.), coating process (primer, coating method of topcoat, drying conditions and coating thickness control), Appearance mass requirements (coating flatness, uniform color, no sag, bubble, etc.) and inspection rules. The standard is applicable to the surface painting of all kinds of construction machinery and equipment, aiming to improve the protective performance, aesthetics and environmental adaptability of equipment by standardizing the coating process and quality control, and provide technical basis for the painting design, construction and inspection of construction machinery and equipment.