Advantages of erw tubes

Posted by zora li on February 2nd, 2023

Advantages of erw pipes

High frequency welded pipe (ERW) needs to go through a series of processes from raw materials to finished products. The production process mainly depends on the product variety. The completion of these processes requires various mechanical equipment and welding, electric control, and detection devices. These equipment and devices are arranged reasonably according to the needs of different technological processes. High-frequency welded pipe mainly uses the skin effect and proximity effect of high-frequency current to make the current highly concentrated on the edge to be welded, so that it is heated to the welding temperature within one hundredth of a second, and then the pressure welding action of the extrusion roller Down.

The advantage of this processing technology of high-frequency welded pipe is that there is a heat treatment process after welding, which eliminates the residual stress of the weld and the heat-affected zone, refines the grains, the heat-affected zone of the weld is small, and the heating speed is fast, which can greatly improve the welding process. The speed and quality of the weld seam can be used as a blank without pickling, shot blasting, and edge-trimming strip steel. At the same time, alloy steel, high-alloy steel and non-ferrous metal pipes can be welded, which greatly reduces the unit power consumption. Only one set of welding equipment can be used. A high frequency welded pipe was produced.

But at the same time, for the high-frequency welded pipe unit, the larger the pipe diameter, the more restricted the coil weight and wall thickness of the strip material. Storage devices are limited by screw loops. In addition, the linear speed of the high-frequency welded pipe unit is relatively high, and the speed of the arc welded pipe is generally 3m/min, and the two do not match. Therefore, the high-frequency welded pipe unit needs to make full use of and expand its own advantages to improve product quality and develop new products.