The surface treatment process of steel fire door leaf is powder spraying or PVC coating, which is a mature environmental protection process. The steel fireproof door has the characteristics of environmental protection and durability. It is very suitable for public use.

ZHTdoors pòt dife, 31 ane eksperyans nan pwodiksyon nan pòt dife ak fenèt yo. Pwensipal UL dife pòt yo, EN dife pòt yo, BS EN dife pòt yo, elatriye,.Nou gen certification.ZHTdoors sipòte OEM ak konsepsyon gratis.Avantaj nou yo: bon kalite, pri faktori, bon sèvis.Byenveni pou konsilte nou.