Is the color steel plate sandwich panel fireproof?
Color steel plate is a composite plate that uses color-coated steel plate as the surface material and polystyrene foam as the core material. It is lightweight and has good seismic resistance (the weight is only 1/4~1/5 of other organic plates), waterproof and waterproof. It has advantages such as being moth-proof and easy and quick to install.
Users favor it due to its many advantages. However, most of the various color-coated coil products currently sold on the market do not indicate their combustion performance level or are incompletely marked, which brings certain hidden dangers and troubles to the users. Therefore, it is necessary to understand some relevant knowledge in order to make the correct choice. and use.
1. According to the GB8624-97 “Combustibility Classification of Building Materials and Products” standard, there are three types: Class A non-combustible materials, Class B1 flame-retardant materials and Class B2 combustible materials. According to this requirement, decorative panels for buildings can be divided into the following three categories:
(1) Flame retardant decorative panel:
For example, the surface treatment layer of rock wool thermal insulation materials uses ultra-thin silicone-acrylic resin film produced by inorganic fiber spraying technology as the protective layer of flame-retardant decorative panels. Products made of this material will not produce open flames under normal construction conditions and have good fire resistance. They are suitable for interior decoration of buildings with fire protection requirements and ceiling projects in public places.
(2) Non-flame retardant decorative panels:
(Including ordinary PVC plastic-coated ones and aluminum foil-coated ones) Such products have low-temperature resistance. Generally used for the base part of wall projects and ceiling projects in public places without special requirements. For example, the ceiling linings in shopping mall business halls and the ceiling linings in office conference rooms all fall within this category.
(3) Flammable decorative panels:
This product is not resistant to high temperatures, is prone to aging, becomes brittle, cracks and deforms, and has a short service life. It is mostly used as a temporary exterior wall covering or the inner wall panel of a simple awning.
2. According to the standard GB50203-2002, there are different quality index requirements for color steel plates with different thickness specifications. The allowable deviation range of thickness is listed in the following table
3. According to the provisions of the national standard, when the nominal size of the color steel plate is greater than or equal to mm, it can be called a galvanized iron embossed wall corner protector if it meets at least one of the following conditions.
a.1 Galvanizing amount ≥120g/m2; b.2 Edge protection width ≤80 mm; c.3 Tolerance ±3%; d.4 Bending strength >400N/m2.