How many items should the indoor intumescent fire retardant coating meet according to BS 476-21 fire resistance standard?

Intumescent fire retardant coating - Definition ：

Intumescent fire retardant coating is made of ethyl fiber 、 Chlorinated paraffin 、 Fireproof paint 、 auxiliary 、 One component self drying coating composed of solvent, etc . Its main features are good protection performance ; Fast drying ; Strong hardness ; Strong adhesion , Good mechanical properties ; Good matching performance with substrate .

Flame resistance - Definition ：

Fire resistance is the resistance of materials to fire . Under the same other conditions , Materials with high fire resistance provide better protection for themselves than materials with low fire resistance . Flammability can be measured by the time that the material can maintain its design integrity under specific fire .

When the material is exposed to a specific fire environment , Within this time , The decline and deterioration of its performance are still within a certain allowable range . Usually only for an entire system , For example, the ground 、 Wall or ceiling and other structures , To determine its flame resistance . The flammability of the material is expressed in terms of time .

Main test items ：

Fire endurance ：

Under standard fire test conditions , Building components , Fittings or structures act from the action of fire , To lose stability , Integrity or insulation .

Fire resistance stability ：

Under standard fire test conditions , The ability of load-bearing or non load-bearing building components to resist collapse within a certain period of time .

Fire integrity ：

Under standard fire test conditions , Building partition components when one side is exposed to fire , The ability to prevent the penetration of flame and hot gas or the emergence of flame on the back fire surface within a certain period of time .

Fire resistance and thermal insulation ：

Under standard fire test conditions , Building partition components when one side is exposed to fire , The ability to ensure that the temperature of its back fire surface does not exceed the specified value within a certain period of time .

analysis ： For intumescent fire retardant coatings for steel structures , The first determination is the structural integrity ,BS 476-21 The standard does not specify whether the bearing is required , Generally according to customer requirements , Recommended load .

BS 476-21 Other applicable products ：

LED Fireproof downlight ;

Container ;

Non combustible sheet , Such as calcium silicate board , plasterboard ;

flash hider ;

Photovoltaic panels ;

wait .

come from JJ2022