Products and technology of high zinc layer of hot dip galvanized seamless pipe
Galvanized seamless steel pipe, as a pipe with high strength and excellent corrosion resistance, is widely used in many fields such as industry, construction, energy and transportation, and has become an indispensable part of modern engineering materials.
Its manufacturing process is fine, the raw materials are selected high-quality carbon structural steel or alloy steel, and it is formed by precision hot rolling or cold drawing to ensure smooth inside and outside the tube wall, accurate size and uniform wall thickness. Then, through advanced hot-dip galvanizing technology, the molten zinc liquid is uniformly covered on the surface of the steel pipe to form a dense galvanizing layer. This layer of galvanized layer not only effectively insulates the steel pipe from direct contact with the external environment, prevents oxidation and rust, but also greatly enhances the durability and service life of the pipe, even in harsh environments such as humidity, salt and alkali, it can still maintain excellent performance.
With its unique material characteristics and wide applicability, galvanized seamless steel pipe has shown extraordinary value in many aspects such as water supply and drainage system, fire sprinkler, oil and gas transmission, structural support, etc. In the water supply and drainage system, it can effectively prevent water pollution and ensure water safety; In the field of fire sprinkler, its characteristics of high temperature resistance and corrosion resistance ensure the stability and reliability of the fire protection system; In terms of oil and gas transmission, high strength pipe wall and excellent sealing performance ensure the safe and efficient transmission of oil and gas; In terms of structural support, it has won the favor of engineers and architects with its rugged and easy installation characteristics.
Hot-dip galvanized seamless pipe is a kind of pipe material with high zinc layer and good toughness, which is widely used in construction, transportation, machinery and other fields.
First, the characteristics of hot-dip galvanized seamless pipe
Hot-dip galvanized seamless pipe is a kind of steel pipe treated by hot-dip galvanized process, and its surface is covered with a thick zinc layer, which has a high zinc layer and good corrosion resistance. At the same time, the hot-dip galvanized seamless pipe also has good toughness and can adapt to a variety of complex environments. Compared with other pipe materials, hot-dip galvanized seamless pipe has the following characteristics:
1. High zinc layer: the zinc layer thickness of hot-dip galvanized seamless pipe is generally up to 30-50 microns, which has a long service life and good corrosion resistance.
2, good toughness: hot-dip galvanized seamless pipe has good toughness, can be used in complex environmental conditions, such as buildings, Bridges, tunnels and so on.
3. High strength: The strength of hot-dip galvanized seamless pipe is high, and it can withstand high pressure and gravity.
4. Easy maintenance: The surface of hot-dip galvanized seamless pipe is smooth, not easy to accumulate scale and breed bacteria, easy to clean and maintain.
Second, the production process of hot-dip galvanized seamless pipe
The production process of hot-dip galvanized seamless pipe mainly includes the following steps:
1. Preparation: Polish the surface of the steel pipe to remove surface dirt and rust.
2. Molten zinc liquid: the steel pipe is immersed in the molten zinc liquid, so that the zinc forms a thin layer of zinc on the surface of the steel pipe.
3. Cooling: Remove the steel pipe from the zinc liquid and cool it to room temperature naturally.
4. Polishing: Smooth the zinc layer on the surface of the steel pipe to make it more beautiful.
5. Inspection: Quality inspection of the steel pipe to ensure that it meets the relevant standards.
Third, the practical application of hot-dip galvanized seamless pipe
Hot-dip galvanized seamless pipe has been widely used in construction, transportation, machinery and other fields. In the field of construction, hot-dip galvanized seamless pipes can be used in Bridges, high-rise buildings, tunnels and other infrastructure construction; In the field of transportation, hot-dip galvanized seamless pipe can be used in the construction of railway, highway, waterway and other transportation facilities; In the mechanical field, hot-dip galvanized seamless pipes can be used to manufacture various mechanical parts and structural parts. In addition, hot-dip galvanized seamless pipe can also be used in petroleum, chemical, electric power and other fields, such as manufacturing oil and gas pipelines, chemical pipelines, power supports, etc.
Fourth, the difference between hot-dip galvanized seamless pipe and cold galvanized pipe
There are obvious differences between cold galvanized pipe and hot galvanized seamless pipe in terms of production process, appearance and service life. First of all, cold galvanized pipe is an electroplating process at room temperature, and hot galvanized seamless pipe is a hot dip plating process at high temperature, so the surface treatment effect and service life of the two are different. Secondly, the surface of cold galvanized pipe is smooth, while the surface of hot galvanized seamless pipe is relatively rough, so there are differences in aesthetics. In addition, the strength and corrosion resistance of cold galvanized pipes are relatively poor, while the strength and corrosion resistance of hot-dip galvanized seamless pipes are better, and they can adapt to more complex environmental conditions.
As a base material, its quality is as stable as a rock, and the zinc layer is like a warrior in bright armor, showing a high protective force. This zinc layer, not only the thickness is considerable, but also gritty, as if the steel pipe is covered with a layer of fearless shield, so that it can still stand up under the test of fire and time, guarding every line of fire safety. Such excellent quality and protection are undoubtedly the indispensable mainstay of fire protection engineering.
Galvanized seamless steel pipe has a wide range of applications in our lives, and its zinc layer meets the standard and does not remove zinc leakage plating is favored by people. So, how does the zinc layer of galvanized seamless steel pipe reach this standard?
First of all, we need to understand the production process of galvanized seamless steel pipe. Galvanized seamless steel pipe is the zinc ingots melted at high temperature, and then through the centrifuge to melt the molten zinc liquid onto the seamless steel pipe, thereby forming a dense layer of zinc. In this process, the temperature of the zinc liquid, the speed of the centrifuge and the time of galvanizing will affect the thickness and quality of the zinc layer.
In order to make the zinc layer of galvanized seamless steel pipe reach the standard of non-dezincing leakage plating, we need to take a series of measures. First of all, in the selection of raw materials, we need to choose high-quality seamless steel pipes, whose surface is smooth and flawless, which can ensure that there will be no leakage plating in the galvanizing process. Secondly, in the galvanizing process, we need to strictly control the temperature of the zinc liquid and the speed of the centrifuge to ensure that the zinc liquid is evenly distributed on the seamless steel pipe. In addition, we also need to strictly inspect the galvanized seamless steel pipe to check whether the surface is smooth and whether there is leakage plating. For unqualified products, we need to rework or scrap them.
In addition to the control in the production process, we also need to pay attention to the impact of the use of the environment on galvanized seamless steel pipes. For example, in a humid environment, the zinc layer is prone to corrosion due to the action of water, resulting in leakage plating. Therefore, when using galvanized seamless steel pipes, we need to choose the appropriate anti-corrosion measures according to the use of the environment, such as coating, chrome plating and so on.
In short, the zinc layer of galvanized seamless steel pipe meets the standard and does not remove zinc leakage plating, which requires us to strictly control the process parameters in the production process, select high-quality raw materials, and pay attention to the impact of the environment and the correct use method during use. Only in this way can we ensure the quality and performance of galvanized seamless steel pipes and provide better protection for our life and production.
