Light steel keel purchase standard

The quality of light steel keel is decisive:

1. High quality steel strip with high quality;

2. Light steel keel forming equipment;

3. The thickness deviation of the light steel keel steel strip;

4. Double-sided galvanizing of light steel keel;

5. Appearance quality;

6, fine management of keel manufacturers.

Appearance quality The shape of the light steel keel should be flat and the edges and corners should be clear. The incisions are not allowed to have burrs and deformations that affect the use. The galvanized layer is not allowed to have defects such as peeling, tumor, and shedding. When the appearance quality is checked, visual inspection shall be carried out under the condition that the light is bright at 0.5 m from the product. The surface of the light steel keel shall be galvanized and rust-proof. The double-sided galvanizing amount shall be not less than 120g/m*m, the first-class product shall not be less than 100g/m*m, and the qualified product shall not be less than 80g/m*m.

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