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Galvalume Corrugated Roofing sheet  (6)
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ארכיון
steel coil
Galvanized Corrugated Steel Sheet Installation
02/09/2019 12:04
qqjuniper

1. Laying the first board: first locate the first board, and fix the position of the low cost Galvanized Corrugated Steel Sheet according to the layout drawing and the corresponding hole position on the purlin. The first low cost Galvanized Corrugated Steel Sheet is installed from the east side gable near the gutter, and is laid from east to west. Installed.
2. When the profiled steel plate is connected with the purlin, it is fixed by 5.5*30 self-tapping screws with waterproof gasket. The fixing point should be set on the trough, and the self-tapping screw is fixed in the valley, and the length direction is 350mm. When fixing, the manual operation is moderate, and it is not appropriate to fix the self-tapping screws too tight or too loose to prevent the formation of gaps.
3. The lap joint of the Galvanized Steel Roofing Sheet: China supply Galvanized Steel Roofing Sheet is connected by self-tapping screws, and the sealant is sealed at the joint to prevent leakage, so that the joints are tightly and smoothly engaged.
When the lap joint is made, the two pressed steel plates are lapped one by one, and the lap joint is fastened with a self-tapping screw with a waterproof rubber pad. When longitudinal lap joint is required, the two profiled steel plates are overlapped and overlapped, and the lap length is about 250 mm. After the lap joint, the self-tapping screws are used for fixing.
4. When laying the Galvanized Steel Roofing Sheet, the lap joint of the adjacent two plates should be overlapped according to the maximum frequency wind direction (the dominant wind direction is the southeast wind), which can avoid the cold air being poured into the room during windy.
5. The ridge is laid from the side of the gable. It is fixed with a 5.5*30 self-tapping screw and a purlin. The fixing of the purlin and the profiled steel plate is strict and straight.

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Prevent GI Steel Coil with Spangles Crack
20/06/2019 10:46
qqjuniper
GI steel coil with spangles


GI steel coil with spangles is prone to crack before welding, why such a situation occurs, so we must first understand the cause of crack to find the cause, in order to prevent the occurrence of accidents.

Under the action of arc heat, the zinc layer near the groove of the galvanized coil produces oxidation (ZnO) and evaporation and volatilizes out white smoke and steam, so it is easy to cause pores in the welding seam. The greater the welding current is, the more serious the evaporation of zinc is, and the greater the stomatal sensitivity is. When welding with titanium type and titanium calcium type electrode, it is not easy to produce pores in the medium current range. When using cellulose type and low hydrogen type welding rod welding, small current, and large current are easy to produce pores. In addition, welding rod Angle should be controlled as far as possible in the range of 30° ~ 70°.

Secondly, when GI steel coil with spangles is welded by arc welding, the zinc layer near the molten pool oxidizes into ZnO and evaporates under the action of arc heat, forming a large amount of soot. So good ventilation measures must be taken. Under the same welding specification, the amount of smoke produced by titanium oxide welding rod is lower, while the amount of smoke produced by a low-hydrogen welding rod is larger.

At last, the welding current of the GI steel coil is relatively small, and the ZnO formed in the heating process is not easy to escape, easy to cause ZnO slag inclusion. ZnO is stable and it's melting point is 1800℃. Large block ZnO slag has a very unfavorable effect on weld plasticity. When using titanium oxide electrode, ZnO is small and evenly distributed, which has little effect on plasticity and tensile strength. When using cellulose or hydrogen electrode, the weld ZnO is larger and more, the weld performance is poor.

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How to choose high-quality decorative board
13/06/2019 11:37
qqjuniper
aluminum zinc steel coil

There are many kinds of metal decorative plates, such as pressure plate, zinc plate, China aluminum zinc steel coil, aluminum alloy plate, aluminum magnesium composite plate, copper plate, stainless steel plate, color stainless steel plate, etc. There is a variety of shapes of the board, some composite board insulation composite between two layers of metal plate, also some for the single board. After all, how should choose and buy metal adornment board? Follow the small series to see it together.

First, according to the process classification
1. Electroplating
Electroplating: the process of attaching a metal film to the surface of metal or other materials by electrolysis. It can prevent corrosion, improve wear resistance, electrical conductivity, reflectivity and improve aesthetics.
2. Water plating
In aqueous solution does not rely on the external power supply, rely on the reducing agent in the plating solution for chemical reduction reaction, so that metal ions continue to reduce on the autocatalytic surface, forming a metal coating process.
3. Fluorocarbon paint
Refers to the coating with fluorine resin as the main film-forming material; Also known as fluorocarbon paint, fluorine paint, fluorine resin paint.
4. Spray paint
Spray the paint with compressed air into a mist coating on the stainless steel plate to form different colors.

Second, the purchase of high-quality metal decorative board
1. First, distinguish the material of the metal plate
At present, the common materials of the color stainless steel plate in the market are 201, 304, 31 and other 6 types of stainless steel coloring and processing, among which the corrosion resistance of the material is 316, the poor material is 201, and their prices are also different, so many businesses with less than 201 material to replace 304, 316. Or the use of water plating coloring process instead of vacuum ion plating coloring process of color stainless steel plate sales to customers, so that many building decoration projects to install color stainless steel titanium plate, mirror plate and other surface color fade, rust or even fracture. So in the purchase inspection process to be strict whether the material of the plate is good material, and stainless steel is different material can be used to detect the solution.

2. The surface color coloring process
Also stainless steel coloring process is also one of the important factors that decide the price, soaking water coloring process due to the use of chemical plating liquid and has compared with the vacuum plating the color shading technology, which is the difference between the vacuum plating coating film layer and the adhesion strength of the workpiece surface is bigger, membrane layer's hardness is higher, better wear resistance and corrosion resistance, the performance of the film is more stable, such as colored stainless steel, titanium plate, titanium plate of gold plated surface water feeling giving a person is the spray go up; Vacuum plating film will not produce toxic or contaminated substances. Water plating will produce wastewater pollution, compared with vacuum ion plating, color is not so pure, will appear the phenomenon of the shell, but the price is much cheaper than vacuum plating.

Because of both metal decorative sheet or coloring process is generally difficult to distinguish from the naked eye, need to have rich experience to distinguish the quality of personnel, so when choosing to purchase metal decorative decoration materials must find, reputable factory to buy, do not delay for showed decoration engineering.

3. Look at the metal surface
Because the metal decorative plate is mainly used for building decoration and decoration engineering, the ornamental value of its surface is particularly important. So in the inspection, the need to carefully examine and observe the surface, whether there is between the plate color difference, uniform coloring, good color, scratches, sand holes, peeling watermarks, and other defects. Especially like titanium plate, the surface is mirror effect, if the quality is good, the surface should be no grinding head flowers and horseshoe marks, and the brightness is higher, of course, the price will be relatively high.

4. Film quality
Metal decorative plate products should be affixed with a layer of protective film on the surface after processing, this layer of film can ensure the surface smoothness will not be polluted, or to protect the hard object scratch. But if it is a poor quality of protective film placed for a long time, it will appear powder, it is difficult to tear or tear a lot of glue stuck on the surface of stainless steel, causing the metal surface is not only difficult to remove. Customers in the inspection are, can tear off a larger area to see the quality of the film; In addition, after the installation of decoration project, the film should be torn off as soon as possible, especially the outdoor decoration project. After installation, the film should be torn off immediately.

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Good quality of PPGI corrugated sheet
12/06/2019 11:31
qqjuniper
PPGI corrugated roofing sheet

The PPGI corrugated roofing sheet for sale has the following standards to achieve a good quality level.

1. Mechanical properties are important indicators for measuring formability and are important parameters for determining and adjusting the processing technology. Therefore, it should be considered first when processing.

2. Pencil hardness, T-bend, impact energy and other indicators are closely related to processing performance, so it should be fully considered.

3. When the shape of the part is complex and the degree of deformation is large, multi-pass forming should be adopted. If it is formed at one time, the adhesion between the coating and the substrate may be broken due to excessive deformation.

4. When processing, set the appropriate gap according to the shape of the mold, deformation characteristics, process conditions, and other factors. The thickness of the coating should be considered when setting the gap.

5. Most coatings can be used as solid lubricants and can meet the lubrication requirements of most forming processes. Some coatings can improve the lubricity of the coating by adjusting the formulation. If the lubricity of the coating is insufficient, the lubricity can be improved by oiling, waxing, and peeling off the protective film. However, it should be noted that wet lubricants tend to absorb dirt and should be removed prior to installation. The peelable protective film should also be removed as soon as possible after construction.

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How to improve the service life of prepainted
11/06/2019 11:23
qqjuniper
prepainted color galvanized coil

According to previous work experience and practice, the weldability and durability of hot sale prepainted color galvanized coil are summarized

1. Durability
Steel structure company steel durability is mainly its corrosion resistance function, about long-term exposure to the air or often in the dry and wet alternate environment of steel structure, easy to produce corrosion damage. The damage of corrosion to steel structure is not only limited to the uniform weakening of effective section of steel, but also the local rust pit will cause stress concentration, thus reducing the bearing capacity of the structure. Cause brittle failure.

2. Weldability
Weldability of steel products by steel construction company refers to the ability to obtain weld joint that meets quality requirements under given construction mode and welding technology conditions. Poor welding function steels are prone to brittle cracks in the heat affected zone of welding, and it is not easy to guarantee welding quality unless a specific messy welding technology is selected. Therefore, as for the important welding structures under dynamic load, the welding function of the steel used should be identified. The welding function of steel can be tested by test specimen of welding seam to determine the fatigue strength, plasticity and impact toughness of steel in welding seam and heat affected zone.

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Aluminum zinc steel coil and galvanized coil
10/06/2019 12:59
qqjuniper
GL galvanized steel coil

Aluminum-zinc steel coil in stock the surface of the coating is composed of 55% aluminum, 43.5% of the zinc and small amounts of other elements, aluminum zinc plating coating under microscopic surface for honeycomb structure, composed of aluminum in the "honeycomb" containing zinc, in this case, aluminum zinc plating coating has anodic protection role, but on the other hand due to the shrinking of zinc content on the one hand, because of the zinc material by aluminum bag not the role of electrolysis anode protection so greatly reduced, so once the aluminum-zinc steel coil is cut, the cut off the edge of the protection of basic loss was will soon be under the condition of corrosion, so the plating aluminum zinc steel coil should be cut less as far as possible, Once cut after the application of anti-rust paint or zinc-rich paint to protect the edge, only to be able to extend the life of the plate.

The surface of zinc plating plate than the galvanized plate to beautiful, at the same time, the price of zinc plating plate than galvanized plate expensive, the price of small zinc flowers than large zinc flowers expensive.

In the city with more humid air and rain, once a certain point of high-quality GL galvanized steel coil appears rust, if you do not take measures in time, the slow corrosion place will be bigger and bigger, and finally even the whole board surface; And galvanized sheet even if a point of corrosion will not spread.

In general, galvanized and galvanized color coating roll can be used together, but galvanized zinc color coating roll than galvanized color coating roll has a better reflection, heat insulation, and corrosion resistance. Alkaline environment to use more zinc substrate, acid environment to use aluminum zinc substrate is better.

The zinc-plated plate is a steel plate with a layer of zinc on the surface. Galvanizing is often used as an economical and effective anticorrosive method, which accounts for about half of the world's zinc production. The surface of the aluminized zinc steel plate is characteristic of smooth, flat and gorgeous star flowers, the primary color is silver white. Special coating structure makes it have excellent corrosion resistance.

The difference between the zinc plate and aluminum zinc steel coil mainly lies in the different coating, zinc plate surface evenly distributed with a layer of zinc material, the mother material plays the role of anode protection, that is to say, zinc material alternative corrosion to protect the use of the mother material, only when all the zinc corrosion can hurt the mother material inside.

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Wind - proof dust screen choice galvalumed or
06/06/2019 10:34
qqjuniper
Galvalume Corrugated Roofing Sheet

In recent years, with the attention of dust control in China, the application of wind protection and dust control net is increasing, basically wind protection and dust control net is based on galvanized plate, but also some people say that the rust resistance of aluminum zinc plate is better, requires the use of wind protection and dust control net aluminum zinc plate. So which of these two materials is better?

Wind - proof dust screen choice galvanized or galvanized zinc plate? The difference is superficial.

The difference between the zinc-plated plate and aluminized zinc plate mainly lies in the difference of coating. The surface of the zinc-plated plate is evenly distributed with a layer of zinc material, which has the effect of anode protection on the parent material. That is to say, zinc material replaces the parent material for corrosion and rust, and protects the parent material.

Plating coating on the surface of the aluminum-zinc plate is about 55% aluminum, 43.5% of the zinc and small amounts of other elements, under the onlookers, the surface of the aluminum and zinc plating layer is a cellular structure, made of aluminum honeycomb "wrapped in zinc, in this case, aluminum zinc plating layer has an anodic protection role, but on the other hand due to the shrinking of zinc content, on the one hand, the material in the zinc aluminum package, not easy to produce electrolytic, so the action of the anodic protection also sell at a discount greatly, so once the aluminum-zinc plate is cut, the cut off the edge of the basically lose the protection that this situation will soon be rusty, so low cost Galvalume Corrugated Roofing Sheet should be as less cutting.

Zinc-plated plate is a kind of metal material we are very commonly used, the wind and dust control network used by the galvanized sheet is hot galvanized sheet, hot galvanized treatment will make the surface of the steel plate covered with a thin layer of zinc, this layer of zinc can effectively prevent the air and moisture into, prevent the internal base metal rust.

In the humid air and more rain in the city, once a point of aluminum zinc plate rust, if not timely measures, corrosion will be more and larger until the entire surface; And galvanized sheet even if a point of rust will not produce diffusion phenomenon.

Through the comparison of the two can see, in the service life and corrosion resistance, the galvanized sheet is better, and the price of the galvanized sheet is cheaper than galvanized zinc plate, wind and dust screen choice galvanized sheet or galvanized zinc plate? So we suggest that you choose windproof dust net material as far as possible to choose a galvanized board.

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Galvalume Roofing Sheet and Galvanized Plate
04/06/2019 11:36
qqjuniper
Galvalume Corrugated Roofing Sheet

The main advantage of the low cost Galvalume Corrugated Roofing Sheet is that the coating plastic and adhesion is better, so before and after the deformation of corrosion resistance unchanged, its resistance to atmospheric corrosion characteristics than conventional hot-dip galvanized much higher, and has a good coating, can make the alloy layer and coating between the combination of long-term stability.

The galvanized coating is the most popular and effective process measure applied in corrosion prevention of steel. In the construction industry, for all kinds of industrial and civil construction of light steel keel, building layer board, corrugated board, rolling door, etc. In household appliances and light industry, used for all kinds of household appliances shell and floor; Galvanized steel is widely used in light industry, power, automobile, and construction industry. In the automobile industry, it is used for automobile body, shell, inner plate, bottom plate, etc.

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How to use ppgi corrugated roofing sheet
03/06/2019 13:09
qqjuniper
PPGI corrugated roofing sheet

The following is mainly about how to use the high quality PPGI corrugated roofing sheet sheep house:

1. Open-top sheep house: In the south, the open-top sheep house is well ventilated and very suitable for the southern climate. The roof can be made of monochrome or bichrome steel sheets (see Figure 1 for standardized sheep house construction).

If it's very cold in winter, you can wrap the sheep in the Central Plains area with automobile oilcloth. If you are a shepherd in Northeast China, please pay attention. In the north, red brick walls must be used around sheep houses to keep them warm in winter. This lid doesn't work.

Sheep pen ventilation, no buildings, using steel structure, barns to adapt to the region, southern Hebei, as long as the winter temperature is not less than minus 15 degrees Celsius, there is no problem, because in this circle, in winter, we can take measures to use car tarpaulins, clinkers or thick cloth wrapped to ensure winter temperature.

2. Building a sheep house by the wall: It can save a little cost, that is, one side by a wall, which can ensure the temperature of the house in winter and save cost.

The premise of building a sleep house is that it is best to sit north to south, and the ground height of sheep house must be higher than that of the playground. If you can raise sheep, try to keep warm on the top of the sheep house in winter by using thermal insulation panels and ppgi corrugated roofing sheets. Cool down with fans in summer and keep warm with waterproof cloth in winter.

0 תגובות
How to use ppgi corrugated roofing sheet
03/06/2019 13:07
qqjuniper
PPGI corrugated roofing sheet

The following is mainly about how to use the high quality PPGI corrugated roofing sheet sheep house:

1. Open-top sheep house: In the south, the open-top sheep house is well ventilated and very suitable for the southern climate. The roof can be made of monochrome or bichrome steel sheets (see Figure 1 for standardized sheep house construction).

If it's very cold in winter, you can wrap the sheep in the Central Plains area with automobile oilcloth. If you are a shepherd in Northeast China, please pay attention. In the north, red brick walls must be used around sheep houses to keep them warm in winter. This lid doesn't work.

Sheep pen ventilation, no buildings, using steel structure, barns to adapt to the region, southern Hebei, as long as the winter temperature is not less than minus 15 degrees Celsius, there is no problem, because in this circle, in winter, we can take measures to use car tarpaulins, clinkers or thick cloth wrapped to ensure winter temperature.

2. Building a sheep house by the wall: It can save a little cost, that is, one side by a wall, which can ensure the temperature of the house in winter and save cost.

The premise of building a sleep house is that it is best to sit north to south, and the ground height of sheep house must be higher than that of the playground. If you can raise sheep, try to keep warm on the top of the sheep house in winter by using thermal insulation panels and ppgi corrugated roofing sheets. Cool down with fans in summer and keep warm with waterproof cloth in winter.

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