UL fireproof door can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. It is used in North America and other countries and regions that have recognized UL standards. Different from other fire doors, American standard fire doors are obviously characterized by that American standard fire doors need to pass the fire water strike test.

Iminyango yomlilo ye-ZHTdoors, iminyaka engu-31 yesipiliyoni sokukhiqiza eminyango yomlilo kanye neWindows. Iminyango yomlilo eyinhloko ye-UL, iminyango yomlilo ye-EN, iminyango yomlilo ye-BS EN, njll., Sine-certification.ZHTdoors isekela i-OEM kanye ne-design yamahhala.Izinzuzo zethu: ikhwalithi enhle, intengo yefekthri, isevisi enhle.Siyakwamukela ukuthi uxhumane nathi.