Color steel plate: fireproof or flammable

Color steel plate itself is not a single material, and its fire resistance depends on the type of intermediate sandwich material. According to authoritative public information, color steel plates can be divided into two categories: flammable and non flammable, with the key difference being the core material:
Flammable color steel plate (with significant fire hazards)
Core material: polystyrene (EPS), polyurethane (PU) and other organic foam materials.
Features:

Extremely low ignition point: polyurethane is about 130 ℃, polystyrene is about 346 ℃, much lower than common building materials.

Fast burning speed: It can ignite within 2 seconds when exposed to open flames or high temperatures (such as smoke or electrical welding sparks), and the flame temperature can reach 2000 ℃.
Release toxic smoke: Burning produces a large amount of toxic gases such as carbon monoxide and hydrogen cyanide, which can cause coma within 1-2 minutes.
Low fire resistance rating: usually only up to B3 level (flammable), does not comply with fire safety regulations for use in densely populated or residential areas.
Fireproof/non combustible color steel plate (compliant with safety standards)
Core material: Inorganic non combustible materials such as rock wool and glass wool.
Features:
A-level fire resistance rating: does not ignite when exposed to open flames, only carbonizes on the surface, effectively blocking the spread of fire.
Good high-temperature stability: melting point exceeding 1000 ℃, suitable for factories, warehouses, temporary buildings, etc.
Compliant with national standards: GB 50205-2001 and other standards explicitly prohibit the use of combustible sandwich materials such as polystyrene for building decoration.
The Material and Combustion Characteristics of Color Steel Plate
Color steel plates are composed of two layers of metal plates (usually galvanized steel plates) sandwiching a layer of core materials such as polystyrene (EPS) or rock wool. This structure determines its combustion characteristics: the color steel plate of EPS core material is flammable and will quickly burn and release a large amount of black smoke when exposed to an open flame; The color steel plate with rock wool core material has better fire resistance and belongs to non combustible materials. Simply put, choosing the right core material is crucial! Just like picking clothes, cotton is prone to wrinkling but breathable, polyester is durable but prone to static electricity, and the core material determines the "temperament" of color steel plates.

Safety suggestions for color steel plates

When making a purchase: be sure to confirm that the core material is A-grade non combustible materials such as rock wool, and request a product testing report.
In use:
It is prohibited to work with open flames or privately pull wires in color steel panel houses;
Maintain a distance of at least 3 meters from the heat source;
Equipped with fire extinguishers and smoke detectors.
Discovering hidden dangers: If used in residential, office, or densely populated areas, immediate replacement with non combustible core material color steel plate should be required.
Conclusion: Ordinary foam sandwich color steel plate belongs to flammable material with poor fireproof performance; And the rock wool core color steel plate has good fire resistance. When selecting, it is important to distinguish the type of core material and avoid using non compliant flammable products to save costs.