Pipe production process of these situations

Three low pressure production process according to the low-pressure three different specifications of cutting. After the first blast cutting, to the surface before forming the oxide scale removal. Forming the hydraulic bulge forming method. There are molds, flat bottom, top with flange holes. After the tube into the tube with a hydraulic cylinder fixed on both sides of the liquid filled into the bulge inwards,  Hydraulic ferrules tube "convex" shape, and then removed from the correct place at the protrusion, the groove is labeled. It has to go through twice shot peening. As the processing process, there is hardening, so it needs treatment.