The fireproof materials filled in the steel fireproof door leaf are environment-friendly and pollution-free. The surface treatment process of the door leaf is powder spraying or PVC coating, which are mature environment-friendly processes. According to the different fire resistance of steel fire doors, their fire resistance can be divided into three grades: A, B, and c. Steel fire doors of different grades can be used in various places.

ZHTdoors fire doors, 31 years of production experience in fire doors and Windows. The main UL fire doors, EN fire doors,  BS EN fire doors, etc.,.We have certification.ZHTdoors support OEM and free design.Our advantages:good quality, factory price, good service.Welcome to consult us.