The classification of fire doors is classified according to the classification of thermal insulation fire doors, which are divided into thermal insulation fire doors (Type A), partial thermal insulation fire doors (Type B) and non-insulated fire doors (Type C). Class A fire doors are also known as fully insulated fire doors, class B fire doors are also known as partial heat insulation fire doors, and class C fire doors are also known as non-insulated fire doors.

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