How to identify the quality of color steel sheet

1: Observe the thickness of the substrate and the thickness of the lamination

The high quality PPGI corrugated roofing sheet is composed of a substrate and a colored peritoneal or plated layer. We must first consider the thickness of the substrate and peritoneal coating. The better color steel plate substrate is 0.02~0.05mm, and the thickness of the lamination or coating is often only 0.15mm. The thickness of the substrate is important because it affects the use of the time of the color steel plate. Some manufacturers of color steel plates often make hands and feet on the substrate and color steel plate coating or lamination. They reduce the thickness of the substrate but increase the thickness of the peritoneum to reduce the production cost of the color-coated corrugated roofing sheet, which greatly reduces the use of color steel plates. Life is up.

2: Observe the outer leakage edge of the color steel plate

When I get a piece of color steel plate, I first observe whether the exposed steel plate such as the cross section of the color steel plate is finely crystallized, whether it is gray, dark and impurities. If the cut surface is crystalline and fine, the quality is superior.

3: Look at the price

Anything is a penny. When we compare the quality of color steel plates, the price is one side, but don't pay too much attention to high quality color-coated corrugated roofing sheet price. If the price of a color steel plate is much lower than the others, then we have to pay attention to.

4: Listen to the sound

If you use a finger or a hard object to strike the color steel plate, if the material of the color steel plate is poor, the sound emitted is boring, the metal sound is not obvious, and the metal color sound of the better color steel plate is louder and crisper.

5: Check the quality certificate of color steel plate

Is there a test standard for the relevant department? If possible, try to go to the manufacturer of the PPGI corrugated roofing sheet for field visits. Look at the environment of the company, whether it is formal. Inquire about the reputation of this company in the market.

The Classification Of Galvanized Steel Sheets

Let’s analyze the classification of galvanized sheet.
1. The hot dip galvanized steel coil for sale. The steel sheet is immersed in a molten zinc bath to adhere to a zinc-plated steel sheet to the surface. At present, it is mainly produced by a continuous galvanizing process, that is, a coiled steel plate is continuously immersed in a plating tank in which zinc is melted to form a galvanized steel sheet.
2. Alloyed galvanized steel sheet. This steel sheet is also produced by hot dip, but immediately after it is discharged, it is heated to about 500 ° C to form an alloy film of zinc and iron. This galvanized sheet has good adhesion and weldability of the coating.
3. Electro-galvanized steel sheet. The production of such a galvanized steel sheet by electroplating has good processability. However, the coating is thinner and the corrosion resistance is not as good as that of hot-dip galvanized sheet.

4. Single-sided plating and double-sided differential galvanized steel. Single-sided galvanized steel, that is, a product that is only galvanized on one side. It has better adaptability than a double-sided galvanized sheet in welding, painting, anti-rust treatment, and processing.

In order to overcome the shortcomings of uncoated zinc on one side, there is a galvanized sheet coated with a thin layer of zinc on the other side, that is, a double-sided differential galvanized sheet.

5. Alloy, composite galvanized steel sheet. It is made of zinc and other metals such as aluminum, lead, zinc, etc., or even composite plated steel. This steel plate has excellent rust resistance and good coating properties.

In addition to the above five types, there are also colored galvanized steel sheets, printed galvanized steel sheets, and polyvinyl chloride laminated galvanized steel sheets. However, the most commonly used ones are still hot dip galvanized sheets.

The Classification Of Galvanized Steel Sheets

Let’s analyze the classification of galvanized sheet.
1. The hot dip galvanized steel coil for sale. The steel sheet is immersed in a molten zinc bath to adhere to a zinc-plated steel sheet to the surface. At present, it is mainly produced by a continuous galvanizing process, that is, a coiled steel plate is continuously immersed in a plating tank in which zinc is melted to form a galvanized steel sheet.
2. Alloyed galvanized steel sheet. This steel sheet is also produced by hot dip, but immediately after it is discharged, it is heated to about 500 ° C to form an alloy film of zinc and iron. This galvanized sheet has good adhesion and weldability of the coating.
3. Electro-galvanized steel sheet. The production of such a galvanized steel sheet by electroplating has good processability. However, the coating is thinner and the corrosion resistance is not as good as that of hot-dip galvanized sheet.

hot dip galvanized steel coil
4. Single-sided plating and double-sided differential galvanized steel. Single-sided galvanized steel, that is, a product that is only galvanized on one side. It has better adaptability than a double-sided galvanized sheet in welding, painting, anti-rust treatment, and processing.

In order to overcome the shortcomings of uncoated zinc on one side, there is a galvanized sheet coated with a thin layer of zinc on the other side, that is, a double-sided differential galvanized sheet.

5. Alloy, composite galvanized steel sheet. It is made of zinc and other metals such as aluminum, lead, zinc, etc., or even composite plated steel. This steel plate has excellent rust resistance and good coating properties.

In addition to the above five types, there are also colored galvanized steel sheets, printed galvanized steel sheets, and polyvinyl chloride laminated galvanized steel sheets. However, the most commonly used ones are still hot dip galvanized sheets.

Color steel plate is mainly used in three aspects

The application of low price color corrugated steel sheet is mainly reflected in three aspects: public building, purification engineering, and combined housing. Let's look at three convenient functions of color steel sheets:

Purification Engineering: With the continuous advancement of society, the electronics and pharmaceutical industries are developing rapidly. In the manufacturing process of these industries, it is necessary to provide a clean production environment. Color steel plates are widely used in production and working environments where cleanliness is required because they are not easy to adhere to dust on the surface of the painted plate, easy to clean and have few seams. Therefore, color steel sheets are widely used as interior walls and ceiling materials. Applications include electronics and computer product manufacturing, medical supplies and pharmaceutical manufacturing, aerospace, precision instrumentation manufacturing, food production, medical operating rooms and more. Although some factories have low requirements for cleanliness, in view of the flexible disassembly and assembly characteristics of color steel plates, color steel sheets are also widely used as partition walls inside the factory.

Public buildings: high quality PPGI corrugated roofing sheet can be mainly used in roofs and exterior walls of public buildings with large space needs, such as station waiting or waiting halls, stadiums, theaters and auditoriums, exhibition halls and convention centers. Due to the need to provide more space, indoor air conditioning, fire protection, etc., the public buildings are more demanding than industrial plants. At present, such buildings are mostly in the form of trusses with trusses or pipe trusses, so the materials for the roof slabs Higher requirements have been put forward in terms of light weight, fire safety, waterproofness and durability.

Combination house: The combination house built with hot sale color-coated corrugated roofing sheet has been widely used, with a series of advantages such as light overall quality, flexible combination, convenient and quick construction, no need for secondary decoration, easy disassembly and relocation. The use of color steel plates to build additional houses is more extensive. Due to the tight urban land use, many units and individuals hope to build a one-story house in the top house without posing a heavy load on the original building. The situation has not only expanded the use area, but also solved the problem of heat insulation and waterproofing of the original roof. The advantages of the color steel sheet combination room fully meet the needs of users. The multi-removal feature of the color steel plate combination room also makes it widely used in temporary buildings. In addition, a large number of color steel sheets are used in industrial plants for multi-purpose combination houses.

Preparation before lifting the Steel Sheet

The components such as customized Wave Type galvanized corrugated steel sheet produced in the prefabrication plant shall be transported to the site by means of transportation means. The choice of transportation mode shall be based on the size and weight of the components, the number of components and the distance of transportation, and the specific conditions of the existing transportation vehicles. Determine after comparison. It is generally transported by car and flatbed trailers, and the components are transported directly to the construction site.

During the transportation of the galvanized corrugated steel sheet, the components must be protected from deformation, non-dumping and damage; the transport road should be flat and solid, and the speed should be determined according to the road conditions to maintain a smooth running; the concrete strength of the reinforced concrete members should not be lower than the design strength level. 70%; the loading and unloading of the components should be stable, and the transportation should be fixed firmly to avoid dumping; the position of the component pads should be correct during transportation, and the loading and unloading points should meet the design requirements. Transportation work should be reasonably organized, and should be hoisted first and supplied according to the hoisting order.

After the components enter the site, they should be stacked according to the plan layout plan of the structure hoisting plan prepared in advance to avoid secondary transportation. Generally, large-scale components such as columns and roof trusses should be placed in accordance with the layout plan of the components in the construction organization. The small and medium-sized components are stacked at the specified positions. Generally, the beams can be stacked 2-3 layers and the Galvanized Corrugated Steel Sheet can be 6-8 layers.