At the end of 1980s, China began to build color steel plate units. Most of these units were built in iron and steel plants and joint ventures. The color steel plate process equipment was basically imported from abroad. By 2000, the domestic color steel
plate reached 1.73 million tons, resulting in overcapacity. The production capacity and equipment level of state-owned super large iron and steel enterprises are relatively high, and they have successively built color steel plate mills with foreign
technology and annual production capacity of 120000-170000 tons.
At the same time, the production of color steel plate invested by many private enterprises mostly uses domestic equipment, with small production capacity, but it is fast and low investment. The products are mainly for building materials and decoration
industries. In addition, foreign capital and Taiwan capital have also landed to build color coating units, but most of them are concentrated in coastal areas. Since 1999, with the prosperity of color coated board market, the production and consumption
of color coated plate has entered a period of rapid growth. From 2000 to 2004, the production increased at an average rate of 39.0%. By 2005, the production capacity of color coated sheet in China is more than 8 million tons / year. There are still
a number of color coating units under construction, with the total production capacity of more than 9 million tons / year.
Before forming is coil material, after forming there are many models, the most commonly used are: 820, 840, 900 and so on! Its composition structure is: protective film (now obsolete), polyester paint, zinc coating, steel plate (cold-rolled plate and
hot-rolled plate), back in the same order! The above analysis does not represent authority!
There are many brands of color steel plate with different advantages and disadvantages.
In general engineering, it can be divided into single board and composite board, and composite board can be divided into rock wool composite board and polyphenylene composite board. Generally, veneers are used in workshops or sheds; some veneers are installed
with rock wool, which is called "field composite". Type 950 is the most common type of composite plate wall panel, and 970 or 960 type of roof plate is the majority. However, 760, 820, 840, 900, 127 or 960 veneers were commonly used. 760 and 820 were
fixed with brackets, and other models were fixed with self tapping screws. 760, 820, 840 are mostly used as roof, 900 are mostly used for wall panel, 127 or 960 are used for wall panel or ceiling reverse hanging plate decoration.
Color steel accessories are also indispensable in the project. Ridge tiles, internal corners, external corners, door and window openings, small gutters, expansion joints, etc., are fixed with rivets and sealed with glue.