The safety and reliability of steel fire doors have been recognized by many customers, because the materials used are solid and stable steel, non rusting, non corrosive, and good sealing. The steel fire door made of high-quality steel and refractory materials can not only meet the safety requirements, but also ensure the long-term stable use of users without damage.

Deriyên agir ZHTdoors, 31 sal ezmûna hilberînê di deriyê agir û pencereyan de. Deriyên agir ên sereke yên UL, deriyên agir EN, deriyên agir BS EN, hwd.. Em xwedî sertîfîkayê ne.