Steel fire door series are made in accordance with GB12955 international standard, and are up to ISO3008, BS476, GB/T-7633 standard. As testing by National Testing Center, the products are qualified, with fire-resisting limit up to Class A, B and C requirements respectively. Special-class fireproof door (with fire-resisting limit of 2.0h) can be made for special applications. The steel fire doors have obtained Model Certificate issued by State Public Security Ministry Fire Product Appraisal Center.