LSAW Pipe Manufacturers

Product Details:

Straight seam submerged arc welded pipes (LSAW) are generally made of steel plates as raw materials. After different forming processes, double-sided submerged arc welding and post-weld diameter expansion are used to form welded pipes.

The main equipment includes edge milling machines, pre-bending machines, forming machines, pre-welding machines, diameter expansion machines, etc. At the same time, the forming methods of longitudinal submerged arc welded pipes include UO (UOE), RB (RBE), JCO (JCOE), etc. The steel plate is first pressed into a U shape and then into an O shape in the forming mold, and then internal and external submerged arc welding is performed. After welding, the diameter is usually expanded at the end of the entire length (Expanding), which is called UOE welded pipe. The steel plate is rolled and bent into shape (Roll Bending), and then internal and external submerged arc welding is performed. After welding, the diameter is expanded to RBE welded pipe or not to RB welded pipe. The steel plate is formed in the order of J type - C type - O type, and after welding, it is expanded into a JCOE welded pipe or not expanded into a JCO welded pipe.

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