Manufacturing Process Flow Chart for Cold Drawing Tubes & Pipes


Seamless or Welded Mother Hollow or Pilgered Hollow is Lubricated/Coated with Chemical by which a thin layer of lubication is formed on the outside and inside surface of the tube. The mother hollow is then cold drawn with the help of Tungsten Carbide Die and Plug set to get the desired diameter and thickness. It is then Solution or Bright annealed, straightened, cut, deburred, pickled and passivated. The tubes then undergo a 100% hydro-testing, visual and dimensional examination, 100% PMI testing and then marked and packed as per Standard or Customer requirement. Now, Cold Drawn Tubes/Pipes are Ready for Shipment.