description
The sheets of steel of certain width, after cutting and pickling are unfolded and leveled and sent to the forming machine. By using the bearing, the steel is processed into the tube shape. The edge of the steel sheet is fused by the film and proximity effect by a high frequency current. The sheet is then extruded and welded into tubes by the use of the extrusion roller. The high frequency electronic welding longitudinal tube manufacturing line is also called the ERW (Electric Resistance Welding) factory.
Application
1.The high frequency electronic welding longitudinal tube manufacturing line is suitable for all types of tubes, whether round, square or rectangular.
- Depending on the functions, the ERW pipe factories are divided between the API models and national standard. The API model mainly produces high-grade steel tubes used as oil delivery pipe, natural gas and oil well casing. The national standard model mainly produces water or gas steel pipes and pipe structures.
Benefits - In the preparation process, this high frequency electronic welding longitudinal tube manufacturing line mainly has the volume type loop funnel.
2.In the forming unit, the ERW pipe manufacturing line has the formation of double wire. - The structure of the forming unit has group of vertical rollers, small row of smooth rollers and rollers vertically.
4.In the operating line, the high frequency electronic welding longitudinal tube manufacturing line has installed continuous flow and ultrasonic inspection.
5.The heat treatment of the steel tube has, welding heat treatment in the line, heat treatment by off-line induction frequency and heat treatment of continuous brightness.
ranking - The types of shapes of the high frequency electronic welding longitudinal tube manufacturing line are divided into roller formation, box formation, flexible formation (or F • F • X formation) and fully automatic flexible formation (F F • X).
- The manufacturing line developed in our company has roll forming when having small diameter (Φ ≤ 114), box formation when the diameter is small and thin wall thickness (Φ ≤ 165, δ ≤ 6), flexible formation when the diameter is medium (Φ ≤ 340). Fully automatic flexible forming is used for large diameters.
- Depending on the functions, the high frequency electronic welding longitudinal tube factories are divided between the API and national standard models.
Production process
Roller Loading → Unwinder → Leveling → Cutting and Welding of Steel → Material Storage and Storage → Conformation → High Frequency Welding → Water Cooling → Ultrasonic Inspection → Heat Treatment IF → Air Cooling → Water Cooling → Calibration → Cutting Mobile → Bevelling & Facing → Hydraulic Testing → Final Ultrasonic Inspection → Inspection
