BS ISO 21925-1:2018 Fire resistance tests. Fire dampers for air distribution systems Mechanical dampers

Fire tests
Construction materials
Fire
Pipes
Ignitability
Fire-test classifications
Flame-spread classifications
Floors
Thermal insulating materials
Construction systems parts
Fire resistance
Floor coverings
Classification systems

Link: BS ISO 21925-1:2018 Fire resistance tests. Fire dampers for air distribution systems Mechanical dampers
Source: BSI Standards