What is a tube mill machine? As its name suggests, it is a machine for welding steel pipe, by strip steel continuous by longitudinal seam after the bending molding, and then the metal pipe through high-frequency current heating and extrusion welding longitudinal seam way, the steel pipe is welded into a complete straight seam welded pipe. In this paper, we will introduce the history, production process, principle, advantages and application of ERW Tube&Pipe Mill Machine.
1. History of ERW Tube Mill Machine
ERW Tube&Pipe Mill Machine has experienced two stages of exploration and development. The earliest welded steel pipe was made of steel plate at the beginning of the 19th century for the need of war. Around 1825, furnace welding of steel pipes appeared. It was not until electromagnetic theory was applied that high-frequency straight seam welded pipes in the modern sense were produced. The welding energy of high-frequency straight seam welded pipes originates from industrial frequency current and went through several explorations.
The world’s first truly ERW Tube&Pipe Mill Machine was born in 1951. In the early 1960s, the safety interlock problem of high-frequency equipment was solved, and the ERW Tube&Pipe Mill Machine industry grew rapidly in terms of quality, cost, and variety, surpassing seamless steel pipes by the late 1970s.
2. The production process flow of ERW Tube&Pipe Mill Machine
There are many kinds of ERW Tube&Pipe Mill, including round, square, rectangular, oval and irregular pipes by shape. According to the material, there are carbon steel, galvanized pipe, high strength steel pipe, etc. These welded pipes will be used for different purposes, making the production process line of varying lengths and differences. According to different entry points, different production process classifications can be obtained.
If classified according to the product, the representative production processes are roughly the following four categories: production process of tubes for water and gas transmission, production process of tubes for oil and gas, production process of tubes for boilers, production process of structural tubes for instruments and furniture, etc.
If classified according to the quality of the weld seam, there are roughly two major types of production processes: the production process of the structural class of pipe production process and gas-tight pressure class of pipe production process. Structural class involves the construction of tubes, furniture tubes, mechanical tubes, etc., more focused on the welded tube weather resistance, strength, precision concerns; gas-tight pressure class including low-pressure fluid and medium-pressure fluid transmission tubes, oil and gas tubes, boiler tubes, such as the transport of water, gas, air, steam, oil and other fluids, such tubes generally have more stringent regulations on the precision of the weld seam, stability, etc..
If according to the diameter of the welded pipe size, can be divided into small diameter high frequency longitudinal welded pipe production line process and medium and large diameter high frequency longitudinal welded pipe production line process.
If classified according to the raw material of welded pipe, it can be divided into black pipe production line process, bright pipe production line process, and galvanized pipe production line process.
According to the above four classifications, three production processes can be summarized after comprehensive consideration, which are ordinary (no requirement for weld seam) structural pipe (see Figure 1), medium diameter pipe (requirement for weld seam) fluid pipe (see Figure 2), medium and large diameter pipe (requirement for weld seam) API oil industry grade pipe (see Figure 3). The specific flow chart can be seen in the diagram below.
The above text describes in detail several classifications of high-frequency LSAW pipe production process, in the actual factory production, generally according to the use of welded pipe to determine its production process.
3. The basic principle of ERW Tube&Pipe Mill Machine
The principle of high-frequency welding is based on the Joule-Lenz law of electromagnetic theory, and makes full use of the proximity effect and skin effect characteristics of the current. The basic principle is that when the alternating current i enters the induction loop, the alternating magnetic flux will be generated in the area surrounded by the induction loop over time, and this magnetic flux is subjected to electromagnetic induction through the billet to be welded therein to generate induced electromotive force and induced electric current; and the direction of the electric current is always made to generate a magnetic field to impede the change of the flux caused by the induced electric current, and this impediment and confrontation results in the conversion of the electric energy into the electric energy to be welded in the billet circuit of the induced electric current into Joule heat. Electrical energy in the induction loop into the induction current in the billet circuit to be welded electrical energy, followed by the billet circuit to be welded electrical energy in the form of Joule heat into Joule heat; especially when the induction loop into the high-frequency current, to be welded billet in the induced current and its Joule heat will be converged on the surface of the billet to be welded and adjacent to the billet to be welded billet two edges, and so that the metal continues to heat up the two edges of the billet, when the temperature of the molten metal reaches When the temperature of the molten metal reaches 1250-1450℃, welding is achieved by external extrusion.
The Advantages of ERW Tube&Pipe Mill Machine
- High productivity: With solid-state high-frequency welding machine, it consumes less useless power and saves more than 30% energy, and consumes less cooling water, thus achieving higher productivity.
- High welding quality: high frequency induction welding technology compared to contact welding, there is no jump welding and circuit breaking, so the welding quality is high. Contact welding caused by the welding leg jumping, will burn the weld surface, affecting its quality, induction welding is very good to avoid this defect.
- Strong adaptability: The machine can produce welded pipes of different shapes and materials according to actual needs, and we will provide roller quick change system to expand the applicable space of the machine to meet your more production needs.
- Energy saving and environmental protection: The use of high-frequency induction heating technology reduces energy consumption more effectively than conventional technology. And these machines are smoke-free and environmentally friendly.
4. The Application Scenarios of ERW Tube&Pipe Mill Machine
The ERW Tube&Pipe Mill Machine is widely used in pipe manufacturing in petroleum, natural gas, electric power, chemical and metallurgical industries. Compared with the traditional welding method, this machine has the advantages of fast speed, high efficiency, good welding quality and material saving, which greatly improves the efficiency and quality of steel pipe manufacturing.
In the oil and gas industry, it can be used to produce medium pressure fluid transport pipes to ensure the safety and stability of pipelines. In the power industry, it can be used to manufacture transmission lines, cable bushings, etc., to meet the special requirements of weather resistance and strength of pipelines. In the chemical and metallurgical industries, it can be used to manufacture chemical containers, boiler pipes, etc., to strictly grasp the mechanical properties of pipes and weld residual stress.
Today, ERW Tube&Pipe Mill Machine has become one of the indispensable equipment in the steel pipe manufacturing industry, which is widely used in various fields of pipe manufacturing. Jiangsu New Victor Industrial CO., Ltd. as a company with the spirit of innovation, is committed to providing customers with high quality products, and at the same time, we will provide 7×24 after-sales service and professional technical support. If you are interested in our ERW Tube&Pipe Mill Machine, welcome to contact us.