Process Flow and Precautions of High Frequency Welded Pipe(ERW) Production

High-frequency welding is a type of welding method that uses resistance heat generated by high-frequency currents flowing through the continuous contact surface of the workpiece to achieve mutual connection between the workpieces when the upsetting force is applied. Manufacturers of high-frequency welded pipe units introduced this welding method is similar to ordinary resistance welding, but there are many important differences.
 
The high-quality high-frequency pipe welding machine has a large power supply, and can reach a higher welding speed for steel pipes of different materials, diameters and wall thicknesses (more than 10 times higher than the maximum welding speed of argon arc welding). Therefore, the high-frequency welding production of general-purpose steel pipes has a high productivity. Because the high-frequency welding speed is high, it is difficult to remove the burrs in the welded pipe. This is the reason why the high-frequency welded steel pipes are not yet accepted by the chemical and nuclear industries. one. In terms of welding material, high frequency welding can weld various types of steel pipes.
 
Production process of erw welded pipe:
1. The influence of raw materials on the welding quality of steel pipes. The main factors affecting the quality of raw materials are the unstable mechanical properties of the steel strip, the surface defects of the steel strip and the large deviation of geometric dimensions. 

2. In the production process of high-frequency welded pipes, how to ensure that the product quality meets the requirements of technical standards and customer needs? It is necessary to analyze the factors that affect product quality during the production of steel pipes. Therefore, in the process of steel pipe production, the three links of raw materials, welding technology and roll adjustment should be focused on control.
 
3. The effect of high frequency welding on the quality of steel pipes. In the process of high-frequency welding of steel pipes, the control of the welding process and process parameters, the placement of the induction coil and the impedance device, etc. have a great influence on the welding quality of the steel pipe weld.
 

4. The influence of roll adjustment on steel pipe quality. It can be seen from the steel pipe waste analysis diagram that the roll adjustment is a steel pipe operation process. In the production process, when the rolls are damaged or worn severely, some rolls need to be replaced on the unit, or a certain variety has been continuously produced in sufficient quantities, and the entire set of rolls needs to be replaced. At this time, the rolls should be adjusted to obtain good steel pipe quality. If the rolls are not adjusted properly, it is easy to cause the torsion, lap welding, edge waves, bulging and indentation or scratches on the pipe surface, large ovality of the steel pipe and other defects. Therefore, the roll adjustment should be controlled when changing the roll skill.

Tips: A53 Grade B Seamless is our most popular product under this specification and A53 pipe is commonly dual certified to A106 B Seamless pipe.

ASTM A53 Grade B is the material under the American steel pipe standard, API 5L Gr.B is also the American standard materialFeature Articles, A53 GR.B ERW refers to the electric resistance welded steel pipe of A53 GR.B; API 5L GR.B Welded refers to the material Welded steel pipe of API 5L GR.B.

Article source: https://article-realm.com/article/Finance/8914-Process-Flow-and-Precautions-of-High-Frequency-Welded-Pipe-ERW-Production.html