The various processes involved in the manufacturing of welded tubes are:
Depending on customer specification of the product aspired by the customers, the mother coil of required glade and thickness in slitted/trimmed to a width corresponding to the diameter required by the customer.
2. Tube Forming and Welding
Slitted wil is given as input to the tube mill where the tube forming,welding and sizing in the desired section and dimension take place.
3. Cold drawing or Sizing
If the size and section required by customer can not be precisely obtained on Tube mill, it is then cold drawn.
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.
The process is done in order to reduce the tend caused due to forming and welding process and also the eliminate the minor quality, if any, from the circular tube.
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 wll as internally.
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.
8. Cutting and End Finish
Products having requirement in cut lengths undergo this process. They are further end finished or delumed.
9. Marking and Packing
Marking for traceability is done and packing caused on customer requirement.