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.

ZHTdoors branndører, 31 års produksjonserfaring innen branndører og Vinduer. De viktigste UL branndørene, EN branndører, BS EN branndører, etc.,.Vi har sertifisering.ZHTdører støtter OEM og gratis design.Våre fordeler:god kvalitet, fabrikkpris, god service.Velkommen til å konsultere oss.