... Speed of welded process: 0.5 ~4m/min High Frequency Welded Pipe Making Machine 1. Specifications: 1. Driving motor power 15KW2. ... steel0.25mm6. Process for making industrial pipe strip unfolding, forming, welding, inside polishing, grinding, rough sizing, bright annealing, precise, ... is loosened and being transported into the forming machine.2.The steel strip is first flattened out, and is processed ...