₦airaland Forum

China color corrugated steel sheet manufacturers fire experts pointed out that should focus on five aspects:

First, the use of rock wool with good fire performance as the core material, to prevent the use of polystyrene, polyurethane and other core materials, after the completion of the board room, the externally visible parts cannot be exposed.

Second, it is best to build a new hot sale color-coated corrugated roofing sheet to set up a number of layers should not exceed two layers, try to control one layer.

Third, in the process of use, some heat sources and fire sources must maintain a certain distance from the steel plate.

Fourth, the wires and cables should not be traversed from the core material. If it is necessary to pass through the protective casing, the socket and switch box should be made of a metal galvanized box and the surface mounting method should be adopted.

Fifth, the fire equipment should be in good condition and conditional, and a fire alarm should be installed to facilitate the rapid evacuation of personnel. Sixth, the office area, living area, and work area should be set separately, and a certain safe distance should be maintained between the color steel plate houses.

How do we choose to face a wide variety of coating types? Let the color-coated corrugated roofing sheet manufacturer introduce you to several environmental factors that affect the use of color coated sheets.
 
1. Temperature. The high-temperature coating is easy to soften, and the corrosive medium is easy to adhere. It is easy to penetrate into the substrate, and the oxygen content in the water will increase under high temperature, and the corrosion speed will increase at a certain temperature.
2. Humidity. The corrosion of the substrate in the incision of the color-coated plate and the damage at the processing is electrochemical corrosion, and the low humidity does not easily form an etching battery (ie, an electrochemical circuit).
3. Day and night temperature difference. The temperature difference is large and it is easy to condense, forming a condition of galvanic corrosion on the bare metal. In addition, the large temperature difference also leads to frequent cold and hot deformation of the coating, which accelerates the aging of the coating and the external corrosive medium easily penetrates into the substrate of the PPGI corrugated roofing sheet for sale.
4. The acidity of rainfall and rainfall. The large acidity of the rain is undoubtedly unfavorable for corrosion resistance. However, rainfall has a dual effect. For wall panels and roofs with large slopes, rainfall has the effect of cleaning the surface of the steel plate and washing away surface corrosion products. However, for low-slope roof slabs and poorly drained areas, rainfall is large. It is easy to cause corrosion to increase.
5. Wind direction and wind speed. The effect of wind direction and wind speed is similar to that of water, and it is often accompanied by it. It is a test for the joint of materials because the wind will cause the joint to loosen and the rain will penetrate into the interior of the building.
6. Corrosive sediments. For example, chloride ions, sulfur dioxide, etc. have accelerated the corrosion of PPGI corrugated roofing sheets. These deposits occur mostly in areas with serious coastal pollution and industrial pollution (such as power plants, smelters, etc.).

Composition of Color Steel Sheets

1. The substrate of the high quality color corrugated steel sheet can be divided into a cold rolled substrate, a hot-dip galvanized substrate and an electrogalvanized substrate.

2. The coating type of color steel plate can be divided into polyester, silicon modified polyester, polyvinylidene fluoride, plastisol.

3. The surface state of the color steel sheet can be divided into a coated sheet, an embossed sheet, and a printed plate.

4. The color of the color steel plate can be divided into many types such as orange, milk yellow, deep sky blue, sea blue, blush, brick red, ivory, porcelain blue, etc. according to the user's requirements.


Application of Color Steel Sheets

The market for color coated steel sheets is mainly divided into three parts: construction, home appliances, and transportation. The construction sector accounts for the largest proportion, followed by the home appliance industry, and the transportation industry only accounts for a small portion.

The color steel sheets for construction are generally made of hot-dip galvanized steel sheets and hot-dip aluminum-zinc steel sheets. They are mainly processed into high quality PPGI corrugated roofing sheet or composite sheets with polyurethane and are used for the construction of industrial buildings and airports, airports, warehouses, freezers, etc. The roof, walls, and doors of the building.

Home appliance color sheets are generally based on electro-galvanized and cold plates for the production of refrigerators and large air-conditioning systems, freezers, bread machines, and furniture.

The transportation industry generally uses electro-galvanized and cold sheets as substrates and is mainly used for oil sump and automotive interior parts.

1. After the installation of the aluminum-zinc-coated coil retaining structure is completed, it is an important part to ensure that the surface of the galvanized coil is not damaged during the whole installation process. Therefore, it should be noted that the on-site handling of aluminum zinc steel coil in stock should be lightly handled. Do not drag and pull, do not walk freely on the above; during the on-site cutting process, the bottom surface of the cutting machine should not be in direct contact with the galvanized coil surface. It is best to use a thin triple-rolled coil; do not use aluminum-zinc-rolled rolls and scaffolding during lifting. Collisions and frictions on pillars, brick walls, etc.; workers on the roof should wear shoes with no nails at the bottom; tools carried by operators should be placed in the tool bag, such as on a special cloth or on a roof. On other sheets; do not scatter other materials on the roof or contaminate the coil.

2. The encased structure of high quality galvalume steel coating steel coil is made of steel coil of less than 1mm. The construction load of the roofing should not be too large. Therefore, it is very important to ensure structural safety and construction safety: workers in construction cannot be piled up to avoid concentrated load. If it is too large, the wound surface will be damaged; the construction workers shall not run, fight, smoke or litter on the roof; the coils that are hoisted to the roof on the same day should be installed. If there are unmounted coils, they should be temporarily fixed. In order to avoid being blown off by the wind, causing accidents; in the morning, the roof is prone to dew, and the aluminum-zinc-coated surface of the sloped roof is slippery, and special protective measures should be taken.

3. Other problems that should be paid attention to during the construction of the aluminum-zinc-rolled enveloping structure: the surface iron filings are cleaned, the other removed aluminum-zinc-rolled heads, the aluminum alloy rivets are pulled off the irons; the sealant is sealed with sealant When the surface is cleaned, the sealant should be cleaned so that the sealant has a good bonding surface on the galvanized coil; the used sealant and other debris should be present in the respective carry-on garbage bags; The connection socket should be protected from rain to avoid accidents; the plastic protective film on the surface of the galvanized coil should be completely removed after completion.

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 low cost Galvanized Corrugated Steel Sheet is used to prevent corrosion of the surface of the steel sheet and prolong its service life. The surface of the steel sheet is coated with a layer of metal zinc. This zinc-coated steel sheet is called a galvanized sheet. Zinc plating is an economical and effective method of preserving corrosion that is often used. About half of the world's zinc production is used in this process.

According to production and processing methods can be divided into the following categories:

1. The hot dip galvanized steel coil for sale. The steel sheet is immersed in a molten zinc bath to adhere 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 plate. 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 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 hot sale color-coated corrugated roofing sheet, printed galvanized steel sheets, and polyvinyl chloride laminated galvanized steel sheets. However, the most commonly used ones are still hot dip galvanized sheets.

Galvanized steel products are mainly used in construction, light industry, automotive, agriculture, animal husbandry and fishery and commercial industries. The construction industry is mainly used to manufacture anti-corrosion industrial and civil building roof panels, roof grills, etc.; the light industry uses it to manufacture home appliance casings, civil chimneys, kitchen utensils, etc., and the automotive industry is mainly used to manufacture corrosion-resistant parts for cars, etc. Agriculture, animal husbandry and fishery are mainly used for grain storage and transportation, frozen processing tools for meat and aquatic products, etc.; commercial is mainly used as storage, transportation and packaging equipment for materials.

No matter what product we use, we must first understand its characteristics and performance in order to use it scientifically and reasonably. The following is mainly about the characteristics and scope of the high quality color corrugated steel sheet:
The roof slabs are mainly used for modern industrial buildings, chemical fertilizer plants, sewage treatment plants, electroplating plants, power plants, aquaculture plants, markets, warehouses and other large industrial building roofs and wall new construction and plant renovation projects.
1. Excellent weather resistance and corrosion resistance. It has been verified by practice that our corrugated steel sheets are used in a variety of climatic conditions, showing good weather resistance and good corrosion resistance in acid, alkali and salt chemical corrosive environments.
2. The waterproof performance of the color corrugated steel sheet is outstanding. Use no waterproof layer in 15-90 degree slope roof construction
3. The steel sheet is resistant to wind and earthquake. 90 degree building façade is safe and reliable, able to withstand 12 strong winds
4. The fireproof performance of the steel sheet is good. The material has a combustion resistance rating of B1 and is a flame retardant material.
5. The sound insulation and heat insulation performance of the color corrugated steel sheet is good. Porous foam core has good sound and thermal insulation properties
6. Large area and light weight. Lightweight material to reduce building loads
7. Rich in color, lasting stability. Fluorocarbon paint coating, rich in color, smooth surface, acid and alkali resistant, mildew, rainy new
8. High toughness and high strength. Better toughness and strength than similar products.
9. Convenient construction. Our company's color corrugated steel sheets can be directly nailed, drilled, sawed, and planed to easily handle special roof shapes such as façades and arc windows.

The GL Galvalumed Steel Coil made in China have a high heat reflectivity, which is twice that of galvanized steel coils, which are often used as insulation materials.

Heat resistance of galvalumed steel coil
The galvalumed steel coil has good heat resistance and can withstand a high temperature of more than 300 degrees Celsius. It is similar to the high temperature oxidation resistance of aluminum-plated steel sheets, and is often used in chimney tubes, ovens, illuminators and fluorescent lamps.

In the development of non-chromium passivators, stacking tests, humidity tests and neutral salt spray tests were carried out on trivalent chromium and chromium-free products. Two passivation products were selected for industrial testing and then industrial. The material after the test is provided to the customer for operational testing. According to industrial tests, customer operation tests and corrosion resistance of the product, a chromium-free passivating agent, a pure inorganic passivating agent based on diluted phosphoric acid and zinc phosphate, is selected. The passivation reaction is similar to the chromic acid treatment process.

a. When the high quality color corrugated steel sheet is cut, the exposed surface should be facing downward to prevent the swarf generated during cutting from sticking to the coating film surface, causing the flaking gasification.

b. When the construction workers walk on the roof, they should step on the plate in the direction of drainage. They should step on the stringer along the direction of the stringer and wear soft flat shoes.

c. When PPGI corrugated roofing sheet for sale roof is to be longitudinally (rowed and erected), the length of the splicing should be more than 15 cm. The water-stopping glue should be applied according to the design drawing, and the overlapping position should be at the rib position (wall splicing) Should be more than 10 cm long, placed on the stipulations).

d. The self-tapping screws are fixed on the ribs. The recesses are based on the principle that the bottom surface of the self-tapping screws and the ribs are in line. ±1.5mm is qualified. The over-tightened part should be waterproof with water-proof glue, and the loose part should be re-locked.

e. When the daily work is completed, the color steel plate material of the truss and the ground should be tied firmly with nylon rope or hemp rope.

f. The self-tapping screws must be perpendicular to the support surface, and the compression washers must be complete.

Galvanized Steel Coil Suppliers Itroduces Zinc Flower Formation

Shandong HENGZE New Material Co., Ltd. is one of galvanized steel coil suppliers and manufacturers, introduces the zinc flower on the galvanized steel coil.

Zinc flower shape
The shape of the zinc flower depends on the type of alloy added in the zinc liquid. For example, lead and strontium are selected to obtain phoenix-shaped zinc flower; and lead and tin are selected to obtain fern-like zinc flower and the like.
The crystal orientation of the zinc flower on the surface of the coating is different due to its different appearance. For example, when it is simply stretched and deep-drawn, the feather-like zinc flower has the best processing property, followed by the fern-like zinc flower and the leaf-like zinc flower processing property. The worst, while in the bending and tension processing, the leaf-shaped zinc flower has the best workability, followed by the feather-like zinc flower and the fern-like zinc flower with the worst workability.

Zinc flower size
According to the European standard EN 10346:2015, the size of hot-dip galvanized flowers can be divided into ordinary spangles and minimized spangles.
Conventional zinc flower refers to the size and morphology of zinc crystals formed after the normal solidification of zinc solution, and there is no zinc flower (also known as small zinc flower). This is the zinc grain size and shape obtained by special control of the solidification process of zinc. appearance. If the user needs to specify the size of the zinc flower, it is necessary to negotiate when ordering.

Some minor problems with roof slabs are in our solutions and handling. Today, China PPGI corrugated roofing sheet manufacturer has listed two more detailed issues - the waterproofing of the roof through the roof and the sealing of the double-sided roof.

Waterproof treatment of the rod wearing the roof
1. According to the different positions of the rods wearing the roof, according to the drainage conditions, different cutting methods are adopted respectively. There are two types of slitting and crosscutting.
2. The treatment method is mainly to add water retaining ring and waterproof with multi-channel polyurethane waterproof coating.
3. A single water-passing rod member is provided with a water retaining ring separately; a rod member that passes through the plate is arranged, and a series of water retaining rings are arranged along the longitudinal slit.

Double-layer roof sealing method
The skeleton of the double-layer roof block, that is, the curve, is a combination of several more complicated curves. China PPGI corrugated roofing sheet manufacturer reminds you that it affects the tightness of the seal installation and whether the roof shape can reflect the architectural design requirements. The solution to this is:
1. Accurate calculation of the wing sample for the rubbing, supplementing several simple parts that can be adapted to various angles and position adjustments.
2. When installing, use the baseline reference line to adjust the deflection change caused by the deformation of the steel structure.
3. The sealing baffle itself is assembled with narrow strips to accommodate the shape of the non-expandable curved surface.
Paying more attention to the above two problems in detail can reduce many problems caused by improper handling. PPGI corrugated roofing sheet manufacturer can take care of these problems during installation, which can make consumers trust manufacturers and choose more products.