UL fire door standard is to conduct fire resistance test and subsequent water impact test for fire doors within a specified time (60min/90min). Generally, UL labels on products need to be applied for certification, and UL fireproof door labels can be affixed on products only after they meet the certification requirements.

Portes coupe-feu ZHTdoors, 31 ans d’expérience dans la production de portes coupe-feu et de fenêtres. Les principales portes coupe-feu UL, portes coupe-feu EN, portes coupe-feu BS EN, etc.