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Manufacturing Process

  • Slitting
  • Tube Forming and Welding
  • Annealing
  • Cutting
  • Pickling
  • Straightening
  • Tube Draw
  • End Finish
  • Polishing
  • Destructive Testing
  • Eddy Current Testing
  • Dispatch
  • Packing
  • Final Inspection
  • Hydro Testing

Manufacturing of Tubes or Pipes

The various processes involved in the manufacturing of welded tubes are:

Slitting

Depending on the specification of the product aspired by the customer, mother coil of required grade and thickness is trimmed to a width corresponding to the dimensions of the section required by the customer.

Slitting


Tube Forming and Welding

Slitted width is given as input to the tube mill where the tube forming, welding and sizing in the desired section and dimension take place.

Tube Forming and Welding
Tube Forming and Welding


Annealing

The heat treatment is an optional process depending on customer application of the tube. It is done in order to reduce the internal stresses incurred in the tube during the forming process.

Tube Forming and Welding
Annealing

Cold drawing or Sizing

If the customer tolerances are too close for the internal of external dimensions of the tube, then it is passed through this step.

cold drawing bench

Straightening

The process is done in order to reduce the bend caused due to forming and welding process and it also reduces the minor ovality, if any in the circular tubes and pipes.

Tube Forming and Welding

Pickling

It is the surface treatment done in order to remove the scale formed due to annealing or grease and oil from the tubes, externally as well as internally.

Pickling
Pickling

Cutting and End Finish

Products having requirement in cut lengths undergo this process. They are further end finished or deburred.

Cutting and End Finish
Tube Forming and Welding

Tube Laser Cutting

tube-laser-cutting

Polishing

Customer having different application of tube demand for surface finishes like matte or mirror. In this process, a thin layer of material is removed using various media to obtain desired finish.

Polishing Machines

Swaging and Expansion

Swaging is usually a cold working process, used to reduce the diameter, produce a taper, or add a point to the tube. Expansion or Flaring is usually a cold working process, used to expand the diameter along the length of the tube.

Swaging and Expansion