| Forged Flange （Forged or Forged + Grinding Ring ）UW<40kg | Q235/Q345etc | By Mold:14mm-50mm | Outer Diameter <550mm | Raw material preparation→Heating→Forging→Cleaning→Grinding ring |
| By Hand: <400mm | Inner Diameter >50mm | |||
| Cutting Flange（Flame cutting）UW<40kg | Q235/Q345etc | 15mm-70mm | Inner Diameter >480mm | Arrange →Fire cutting material→Welding →Cleaning |
| 45mm<O.D-I.D<145mm | ||||
| Welded Flange（Flame cutting + welding or Welding + rolling） | Q235/Q345etc | 70mm | Max Corss-section 145mm*70mm | Arrange →Flame cutting→rolling→welding and finishing→Cleaning |
| 680mm<O.D<5000mm |