Check the qualification certificate, and note the ex-factory date, specifications, technical conditions, implementation standards, enterprise name and production license number.
Check the qualification certificate, and note the ex-factory date, specifications, technical conditions, implementation standards, enterprise name and production license number.
Check the surface of the product carefully, the product should be bright color, good luster, the surface can not have obvious scratches, bubbles and other defects.
Pay attention to the wall thickness of the product. The thickness of the door and window materials should not be less than 1.2mm
pay attention to the thickness of the product surface coating, film thickness of anodized product should be not less than 10μm, electrophoresis product film thickness should be not less than 17μm, powder coating thickness should be not more than 40-120μm, fluorocarbon paint spraying products should be more than two coating, not less than 30μm.
For coastal area users, it is better to choose electrophoresis, powder coating or fluorocarbon sprayed industrial aluminum profiles which with better corrosion resistance.
