After cutting off the pipeline buried long-time in underground, a relatively strong magnetic field will be generated at the pipe orifice, 
resulting in the inability to weld the pipeline.
HGXC series pipeline demagnetizer is to wind the cable at the orifice. According to the principle of electromagnetic induction, a magnetic field will be temporarily formed at the orifice after power on. Through adjustment, the direction of the magnetic field is opposite to that of the pipeline magnetic field, so as to temporarily offset the original magnetic field and make the welding proceed smoothly.
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