Weld Grinding Machine For the submerged-arc welding pipe, the weld has the surplus. Before having the beveling and hydrotesting, the both sides of pipe need to be grinded. Internal & external grinder can take the role of manual grinding to save the labor, decrease the labor intensity, and improve the production efficiency. Production Process: Pipe Feeding - Welding Seam Alignment - Pipe Rotating - Grinding and Feeding - Finishing - Grinding Head Back Forward - Pipe Exiting