Erw structuram pipe

High-frequency resistance welding steel pipe, welding pipe, and ordinary welding process are not the same, the weld is made of the base metal melt from the body, and the mechanical strength is better than the general pipe. Smooth appearance, high precision, low-cost weld high and small, favorable 3PE anti-corrosion coating. There are significant differences in the welding methods between the high-frequency welded pipe and the Submerged Arcus lacerari pipe {{VII}} sicut in welding fit statim ad altum celeritate, difficultas de ensuring qualis welding est multo altior quam demissam arcus {{VIII}}

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