Numerical Analysis of a High-Frequency Induction Welded Pipe. There are a wide range of important applications for metal tube materials in various fields. The production process of high-frequency longitudinally welded pipe includes first using a roller to coil the long steel strips of a certain size into a cylinder shape, and then join them by
The features of this new pipe-making process are 1) high-temperature welding by use of a high-frequency induction welder, 2) removal of weld bead automatically by use of a specially designed bead 100 Most Important MCQ Of Heating and Welding with Dec 11, 2018 · Heating is accomplished by placing a steel part in the magnetic field generated by high-frequency alternating current passing through an inductor, usually a water-cooled copper coil. The depth of heating produced by induction is related to the frequency of the alternating current:the higher the frequency is, the thinner or more shallow the
Analysis of Induction Heating System for High Frequency Welding 189 Fig. 7 Distribution of magnetic flux density along the "V" zone, f = 300 KHz The results obtained for current density distribution in the region are shown in Fig.8. DEFECTS IDENTIFICATION OF HIGH FREQUENCY High frequency welding of steel tubes was described and researched in many pa-pers and books, while this paper is mainly based and oriented towards literature [1,7]. Welding of metal using of high frequency currency first occurred as an idea by the Russian specialist A. V. Ulitovski in 1946. During 1950, the idea of HF welding
The process of manufacturing ERW pipe uses high-frequency induction welding technology (up to 21 inches OD). This pipe size varies from 2 OD to 24 inch OD and can be just about any length all the way to 100 plus feet. These pipes can have surfaces finishes. Failure Analysis of Premature Corrosion of HF Seam-Welded Mar 02, 2021 · Premature corrosion in the form of longitudinal cracking in a high-frequency (HF) induction seam-welded steel pipe occurred after just 24 months in service. The failed pipe was investigated to reveal the main cause of its failure, and the results of microstructural examinations (light optical microscopy, scanning electron microscopy with energy-dispersive spectrometry)
As the only global induction heating and welding manufacturer specializing in tube and pipe welders, Thermatool provides the widest range of HF Welders available. All of our welders are based on the High Frequency or HF welding process that we developed almost 60 years ago and have led the way ever since. High Frequency Induction Heating - Richie BurnettInduction heating is a non-contact heating process. It uses high frequency electricity to heat materials that are electrically conductive. Since it is non-contact, the heating process does not contaminate the material being heated. It is also very efficient since the heat is actually generated inside the workpiece.
high frequency tube welding machine manufacturer/supplier, China high frequency tube welding machine manufacturer & factory list, find qualified Chinese high frequency tube welding machine manufacturers, suppliers, factories, exporters & wholesalers quickly on Made-in Numerical simulation of high-frequency induction A steel strip is cold-formed into a tubular shape in a continuous roll forming mill. The strip edges are electromagnetically heated and joined mechanically by pushing the strip edges against each other to form the longitudinally welded tube (Figure 1). Figure 1:High Frequency induction welding of steel tube. Figure 2:Macrograph of weld seam
The large-diameter steel pipes are produced by high frequency seam-welding followed by induction-assisted heat treatment. The pipes for oil and the gas transmission are made from low-alloy steels designated X60, X65, X70 etc. depending on the strength and toughness required and the intended application. One of the Selecting a welding frequency - thefabricator
- Metallurgical Interpretation of Temperature DataFactors Used to Determine Weld QualityConsiderations in Finite Element ModelingModeling ResultsMaking The Best ChoiceFEA can be used to determine the temperature distribution in the weld just before the tube encounters the weld box squeeze rolls. For this article, the material selected is low-carbon steel. Interpreting the temperature data in terms of weld quality requires definitions of the temperatures at which various physical effects occur. While these temperatures vary depending on which alloy is used,the temperature values are similar, and the specific temperatures chosen should not affHigh frequency welding - SlideShareFeb 14, 2019 · High Frequency Induction Welding 7 8. High Frequency Induction Welding The induction coil induces a circumferential current in the tube. The high-frequency current flows along the edge of the weld vee due to the proximity effect, and the edges are resistance heated to a shallow depth due to the skin effect.
1) Fast welding speed, high production capacity and good energy-saving effect compared with vacuum tube welder. 2) Output ripple less than 1%, fine shaping and stable quality. 3) Wide adaptation scope for steel pipe welding, induction or contact welding Tackling the Toughness of Steel Pipes Produced by High Steel linepipes produced by high frequency induction welding can result in a lowtoughness zone at the weld junction, even after a heat treatment which reaustenitises the aected region.
May 06, 2008 · High frequency induction welding is widely employed for longitudinal seam welding of small scale tubes and pipes due to its relatively high processing speed and efficiency. This research is aimed at understanding the variables that affect the quality of the high frequency induction welding. The welding variables include the welding frequency, weld speed, vee US7399264B2 - High frequency induction welding of In typical high frequency tube welding processes, a strip of mild steel is passed through several sets of steel rolls to form the strip into a tubular shape having a longitudinal open seam, which
Weldac - High-output, solid-state welders. Weldac is EFD Inductions family of high-output, solid-state tube and pipe welders. The Weldac family covers a wide range of power sizes; from 50 kW up to 2200 kW. and a frequency range of 60-500 kHz. Download brochures. What is Induction Heating? Inductoheat IncFor example bright annealing of stainless steel tube and pipe. High Frequency Induction Welding. When induction is delivered using High Frequency (HF) current, even welding is possible. In this application the very shallow electrical reference depths that can be achieved with HF current. In this case a strip of metal is formed continuously, and
High frequency induction welding is used to make pipe or tube from strip which is fed into rolls which form the strip into a cylindrical shape. The faying edges are brought together between squeeze rolls to produce a V at the point of welding, with an included angle of typically 2-5° for steel. A high frequency coil introduces current into the tube ahead of the squeeze rolls.