Manufacturing process of electric-welded pipes:
1
Rolled steel comes from the warehouse to the procurement site, where it is cut into strips on the longitudinal cutting unit (APR).
2
The resulting strips are transported to the unwinder, where they are sequentially welded and wound on a storage device.
3
Further, the strip from the storage device through the correct rollers is fed into a group of molding stands, where the strip is rolled into a round pipe.
4
The pipe through the block of welding rollers enters the zone of high-frequency welding, where the edges of the strip piled into the pipe are heated to the desired temperature and compressed into the seam cage, thus forming a strong weld along the entire tube billet.
5
The surface of the weld passes cleaning on the grabber, where with the help of a cutter removed the extra grate formed during welding. After that, the pipe is cooled, passing through the refrigerator, and enters the group of calibration stands.
6
At the calibration site, the geometric dimensions of the pipe are brought to the parameters determined by the technical conditions.
7
After calibration, the pipe enters the cutting zone, is cut to the required size along the length with the help of a "flying saw" and is transferred to the receiving roller for collection in the storage pockets.
8
In the storage pocket, the pipe is laid, packaged, weighed, passes quality control, certified and then transported to the finished product warehouse.
