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Seamless steel pipe is perforated with round steel, the surface of the steel pipe without weld is called seamless steel pipe. According to the production method, seamless steel pipe can be divided into hot rolled seamless steel pipe, cold rolled seamless steel pipe, cold drawn seamless steel pipe,
Spiral steel pipe is a spiral welded steel pipe made of strip steel or coiled plate as raw material, often extruded and formed by automatic double-wire double-sided submerged arc welding. Spiral steel pipe and its standard classification: spiral seam submerged arc welded steel pipe for pressure flui
The production process of longitudinally welded pipe is relatively simple. The main production processes are high-frequency welded longitudinally welded pipe and submerged arc welded longitudinally welded pipe. The longitudinally welded pipe has high production efficiency, low cost, and rapid develo