Seamless steel pipes and thick steel plates are have a little magnetic, and even if they come into contact with strong magnet raw materials, the magnetic loss is not large. The magnetism of steel pipes is harm to electric welding. So demagnetize is nessary. The following methods can be used to demagnetize:

1. Physics to demagnetize, wind an electromagnetic coil around the weld and connect to electronics to demagnetize;

2. Turn over the seamless steel pipe during electric welding and try to change the positive and negative electrodes;

3. If the processing technology allows, it can be heated according to the regulations in the raw material and welding method manual. Heatting the welding seam of pipe to 700 ℃ to demagnetize. This method is good but it will reduce the physical properties.

Changsha Xiangjia Metal Materical Co., Ltd. the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.