1. Check the appearance
The high-quality steel fire doors are firmly welded, and the welding spots are evenly distributed; the surface is sprayed flat and smooth. The appearance of high-quality wooden fire doors should be clean or sanded; there should be no planing marks, burrs and hammer marks; the cut corners and joints should be tight and flat. Qualified steel doors and wooden doors should have product marks, quality inspection marks and quality certification (accreditation) marks at the specified positions.
2. Logarithmic value
The appearance size of qualified products should be less than or equal to the shape size in the sample description, the thickness of the door leaf should be greater than or equal to the door leaf thickness described in the sample, the width of the side wall of the door frame should be greater than or equal to the width of the door frame side wall in the sample description, and the size of the fireproof glass should be less than or equal to The outline scale of the fire-resistant glass in the sample description, and the thickness of the fire-resistant glass should be greater than or equal to the thickness of the fire-resistant glass in the sample description.
3. Estimated weight
Quality qualified fire doors are generally heavier, and those very light fire doors must be inferior products.
Fourth, check the certificate
Fire doors are products included in the certification system. Products need to undergo certification inspections before they are sold. Generally, inspection reports describe the standard size, composition, materials, and photos of the samples in detail. When purchasing, you need to contact the manufacturer. Ask for the fire door product report certificate acceptance information corresponding to the product.