UL steel fireproof door is composed of steel frame and steel door leaf. The steel structure can ensure that it is not easily deformed by impact and damaged by external forces, and can be used normally for a long time. On the premise of ensuring the fire protection effect, the steel fire door has the characteristics of environmental protection and durability.

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.