The difference between submerged arc welding and high frequency welding1. Submerged arc weldingSubmerged arc welding is a method in which the arc burns under the flux layer for welding. The welding arc burns between the welding wire and the weldment. The heat of the arc melts the base metal and flux

Large diameter welded steel pipe production processLarge diameter welded steel pipe production process mainly adopts cold forming process (JCOE), which is a gradual forming method of steel plate, so that the steel plate is formed into the required bending degree under the standard die of the upper p

Before installing the steel pipe, the trench needs to be dug, and the soil dug after the trench has a reasonable stacking place, the excavated earth should be transported to the outside in time, and should not be too close to the trench, there must be two The distance above the meter, so as not to a