One of the products produced by Foolad Machine Company is electric resistance welding or ERW steel pipes. These steel pipes are one of the most widely used sections in various fields of engineering such as water supply and also structural steelworks which are produced in different grades, thicknesses, and diameters.

Some advantages of these pipes are: high compressive strength against external and internal loads, flexibility, the ability to cut in desired sizes and ease of erection.

The raw material of this product is rolled sheet of carbon steel produced in a hot rolling line and passed through various stations after forming in a cold rolling line. Connection edges are welded to each other without using any electrodes and by means of high-frequency induction welding. After cooling and passing through sizing stations, precise forms and dimensions are obtained. Then pipes are cut to the required length and after final inspection, they will be ready to present to the market. Foolad Machine currently produces 12-inch, 14-inch, and 20-inch steel pipes.

Electric Resistance Welding

The production process of ERW

1. Entry
2. Leveler
3. Shears
4. Forming
5. Welding
6. Coolant
7. Sizing and Straightening
8. Cut-off
9. Preliminary Inspection
10. Off-line Ultrasonic Weld Inspection
11. Dimensional and Visual Inspection
12. Final inspection
13. Length and Weight Scales
14. Coding
15. Packing
16. Loading and Transporting

Electric Resistance Welding

The production process of ERW

1. Entry
2. Leveler
3. Shears
4. Forming
5. Welding
6. Coolant
7. Sizing and Straightening
8. Cut-off
9. Preliminary Inspection
10. Off-line Ultrasonic Weld Inspection
11. Dimensional and Visual Inspection
12. Final inspection
13. Length and Weight Scales
14. Coding
15. Packing
16. Loading and Transporting

ERW Manufacturing lines at FMN

ERW Manufacturing line