1. Check the "Identity"
You can check the consistency through the official website of "China Fire Protection Products Information Network".
2. Check the Label
Is there a permanent label in a prominent position containing information such as the name, specifications, and manufacturer's name?
3. Check the Appearance
Is the appearance complete and undamaged? Are the seams tight? Are the door closers and door sequencers complete and in good working order?
4. Check the Sealing
Can the door leaf close reliably? Is the fireproof sealing strip straight, without arching or damage?
5. Listen to the Sound When Tapping
If the sound when tapping the door leaf is hollow, it is a substandard product.
