Welding technology controls the production and quality of ERW steel pipe. Below are the technical control methods we applied to ensure the high quality and efficiency of ERW steel pipe production.

1. Weld Gap Control

2. Welding Temperature Control

3. Pressing Force Control

4. Frequency Induction Loop Position Control

5. Impedance Check and Replacement

6. Burr Remove

Now, we apply our OD 32mm & WT 2mm welding process as an example, the parameters are as below:

Strip Size: 2 × 98mm in diameter to expand the bandwidth by adding a small amount of profiling allowance

Steel Material: Q235A

Input field voltage: 150V excitation current: 1.5A Frequency: 50Hz

DC output voltage: 11.5kV DC Current: 4A Frequency: 120000Hz

Welding speed: 50 m / min

Parameter adjustment: the timely adjustment of output voltage and welding speed according to the welding line energy change. After the fixed parameters generally do not adjust.