ERW tube or pipes are straight seams electric resistance welded pipe. in brief the ERW pipe, which is a round pipe welded by steel plates. It uses to transport vapor and liquid objects such as oil and natural gas. Electric resistance welding (ERW) refers to a group of welding processes such as spot welding and seam welding. faying surfaces where heat to form the weld is born by the electrical resistance of material combined with the time and the force used to hold the materials together during welding. In general, resistance welding methods are efficient and cause little pollution, however, their applications limited to relatively thin materials.
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Electrical resistance welding will be welders parts formed pressed between two electrodes, and subjected to current, the resistor thermal effects generated by the current flowing through contact with the workpiece surface and the neighboring regions to be heated to melt the plastic state, so that metal-binding method. Resistance welding methods are mainly four types, namely, spot welding, seam welding, projection welding, butt welding.
passed between the two edges of the steel to heat the steel to a point at which the edges are forced together to form a bond without the use of welding filler material.A plate rolled to become a pipe and welded using the Electric Resistance Welding process.
Coils slit to predetermine widths for each size of pipes.
The slitted coil uncoils at the entry of tube mill line and the ends shear and weld one after another. LOTOS is able to offer the largest range of decoilers from manual to fully automatic, according to a range of strip widths and thicknesses.
The main action of the accumulator is to accumulate a steel strip to keep continuously and automatically production in the welding pipe line.
The slitted coils are formed into a cylindrical shape with open edges utilizing a series of forming rolls.
In this stage, the open edges heate to the forging temperature through high-frequency, low-voltage, high current and press welded by forge rolls making perfect and strong.
After water quenching, a little decrease applies to pipes with sizing rolls. This results in producing the desirable precise outside diameter.
ERW seamless pipe, full name Electric Resistance Welding, is a steel pipe made by heating and melting the edge of the tube blank through the skin effect and proximity effect generated by the high-frequency current of the ERW Tube Mill Machine, and pressure welding under the action of the extrusion roller of the erw pipe machine.
ERW Tube Mill Machine adopts hot-rolled steel plate and then welded by high-frequency current. The weld is stress-eliminated by medium-frequency heat treatment, and the internal burrs are removed by an annular knife. Generally speaking, the cross section of erw steel tube is circular, the coating is mostly uncoated black tube, the connection method is welding, and it is suitable for high-pressure fluid transportation.
ERW seamless pipe is mainly divided into two forms: ERW AC welded steel pipe and ERW DC welded steel pipe. ERW straight seam welded pipe is divided into low frequency welding, medium frequency welding, ultra-medium frequency welding and high frequency welding according to the frequency. High frequency welding is mainly used for the production of thin-walled steel pipes or ordinary thick-walled steel pipes, and high frequency welding is divided into contact welding and induction welding.
1/High-precision pipe making process
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ERW tube mill machine realizes ultra-precision processing through five-dimensional closed-loop control system, the deviation of welded tube outer diameter is ≤0.02mm, the deviation of ellipticity is ≤0.02mm, and straightness is <0.8mm/m. ERW tube mill machine adopts high-frequency inductive welding combined with on-line normalizing process, which makes the organization of weld seam consistent with the base material, and the strength of weld seam reaches more than 95% of the base material; the detection rate of defects increases by 40% through ultrasonic flaw detection and real-time monitoring. Real-time monitoring, defect detection rate increased by 40%.
2/Roller quick change system
KINGREAL ROLL FORMER Tube Mill Making Machine adopts dovetail groove positioning + hydraulic locking structure, which reduces the time of changing rollers to 10 minutes, and the production recovery time is only 20 minutes. Equipped with RFID chips, the rolls can automatically recognize the specifications and retrieve the preset parameters, which reduces the error of manual calibration.
3/ERW Tube Making Machine is easy to operate.
ERW Tube Making Machine supports Siemens S7- series controllers, integrates 12 functional modules for welding, forming and cutting, and the operator interface supports Chinese/English/Spanish switching, which reduces the training period to 3 days.
4/ERW Tube Making Machine produces different shapes of products.
ERW Tube Making Machine can produce different shapes and sizes of tubes by replacing the rolls in the tube mill with high frequency ERW tube production line. A single ERW pipe mill production line can produce Φ8-630mm round pipe and 10×10-500×500mm square tube with wall thickness covering 0.5-20mm, and the material is compatible with carbon steel, low alloy steel and magnesium alloy.
☆Chemical Industry: ERW Pipe Mill Machine plays a key role in the chemical industry, used to produce stainless steel pipes and accessories for conveying chemicals, acid and alkali solutions, high-pressure gases, etc. Stainless steel pipes have excellent corrosion resistance and can meet the special requirements of chemical substances to ensure the safe delivery of media.
☆Oil and Gas Industry: The oil and gas industry requires a large number of stainless steel piping systems for conveying, storing and processing energy resources such as crude oil and natural gas. ERW Pipe Mill Machine can produce high-strength, pressure-resistant stainless steel pipes that meet relevant standards and specifications to meet the needs of the oil and gas industry.
☆Food and Beverage Industry: ERW Pipe Mill Machine plays an important role in the food and beverage industry. The food and beverage industry has very high requirements for hygiene. Stainless steel pipes have smooth inner surfaces and are non-toxic and odorless, which can ensure the quality and safety of food and beverages.
☆Pharmaceutical Industry: The pharmaceutical industry has strict requirements on the cleanliness of the piping system and the safety of the materials. ERW Pipe Mill Machine can produce high-precision, seamless stainless steel pipes for conveying drugs, manufacturing medical equipment, etc. Stainless steel pipes are corrosion-resistant, easy to clean and sterile, which are very suitable for applications in the pharmaceutical industry.
KINGREAL ROLL FORMER is a professional roll forming machine manufacturer in China, specializing in the design and quality manufacturing of roll forming machine equipment for more than 20 years. ERW pipe making machine is one of KINGREAL ROLL FORMER most popular products. We can provide customized design solutions according to the actual production needs of erw tube mill, and provide after-sales installation and operation guidance services for erw tube mill machine customers.
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