Fire Door Expansion Fire Seal Strip Selection Guide

How to Choose Intumescent Fire Strips for Fire Doors

The core of choosing fire door expansion fire seal strips is to match the fire rating, installation scenarios and sealing requirements of the fire door. Key factors to focus on include expansion ratio, high-temperature resistance, sealing performance and environmental friendliness, to ensure effective blocking of smoke spread during a fire and guarantee the fire resistance performance of the fire door. First, select the appropriate seal strip based on the fire rating of the fire door. For Class A fire doors, choose a seal strip with a high expansion ratio and strong high-temperature resistance to ensure rapid expansion and filling of gaps during a fire to block smoke and flames; for Class B and Class C fire doors, choose a seal strip with a medium expansion ratio and moderate high-temperature resistance, balancing fire resistance performance and cost.

Secondly, pay attention to the material and performance of the seal strip, and prioritize the use of expansion fire seal strips with graphite as the core raw material. These have stable expansion performance, high-temperature resistance, corrosion resistance, and are environmentally friendly and odorless, meeting the safety requirements of fire doors. At the same time, check the sealing performance of the seal strip to ensure it can closely fit the gaps of the fire door at normal temperatures and play the roles of sound insulation, heat insulation and dust prevention; during a fire, it can rapidly expand to form a dense insulation layer to prevent smoke leakage. Additionally, select the appropriate size and specification of the seal strip based on the installation position of the fire door (such as door frame, door gap), to ensure a secure and tight installation without gaps that could cause fire failure.

Finally, install strictly in accordance with the specifications to ensure that the seal strip is undamaged and does not fall off. Regularly check the aging and wear of the seal strip and replace it in time to ensure the long-term stability of the fire resistance performance of the fire door. Also, take into account the environmental friendliness of the seal strip, avoiding the use of products containing harmful substances, which meets the safety requirements for indoor use.