Most apartment fire doors are Class B, generally used for fire passages, and the fire resistance time is one hour. Grade B steel fire door has excellent sound insulation effect. Its surface is sprayed with electrostatic powder, so its surface is beautiful and firm, and has good fire resistance, integrity and heat insulation.

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.