Inspection standard for color coated steel coil

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Inspection standard for color coated steel coil

The inspection standard of color coated steel coil can be described in terms of specification, size, coating, surface inspection and label requirements.


Specifications and dimensions

The width error is +-2mm, the incision is straight, the section is neat, and the thickness tolerance is +-0.03mm.



The coating type shall meet the contract requirements, the coating color shall be uniform without obvious color difference, and the coating thickness shall meet the contract requirements.


Surface inspection

The coil surface shall be flat, free of obvious concave convex, warped surface, deformation, clean surface, no oil stain, no bubble, shrinkage cavity, missing coating and other defects harmful to the use. The defective part of the steel coil shall not exceed 5% of the total length of each coil, and there shall be no obvious scratch, bump or scar.


Labeling requirements

The paper strip or other materials and products on the package must contain the product name, specification, manufacturer, etc., the packaging mark must be eye-catching, firm, and legible, and the supplier's name or supplier's trademark, standard number, trademark, specification, weight, packaging mark must be marked with the identification number that can trace from steel to smelting, and the quality certificate must be marked with the supplier's name, contract number, product name, standard number, specification, trademark The identification number, weight, number of pieces, production date and delivery date that can track the steel from steel to smelting must indicate the substrate coating weight, finish paint type, color and other contents in the mark.