WELDING DEMAGNETIZERS

Welding requires the use of an arc or a beam of electrons which can be disrupted by magnetic fields causing welding magnetism problems.  Welders have encountered welding magnetism problems on various welding projects throughout their careers.  These welding magnetism problems are caused by magnetic arc blow which can be a serious problem for welding projects causing defects in the weld and increasing costs due to time delays.  A magnetic arc blow is the sideways deflection of the welding arc.  Magnetic arc blows are caused by the interaction of a magnetic field and the welding arc.  If high levels of magnetism exist in any material to be welded it has a magnetic field.  When the welding arc interacts with this magnetic field a deflection of the arc occurs moving it away from the point of welding.  Magnetic arc blows can be very frustrating to welders,  causing defective welds, and delays in welding schedules, consequently increasing costs.    

High levels of magnetism are most common in steel but can occur in various materials.  Any time you continuously move a piece of metal back and forth against another a magnetic field is created.  Impact stress is one of the most common causes for pipelines and sucker rods to become magnetized.  In addition, if a pipe is in the earth's magnetic field such as when buried, the pipe can become magnetized over time. Magnetic clamps or residual magnetism can induce a magnetic field.  The effect of magnetism depends on the welding project, an estimate is that fields 30-40 gauss will cause problems to welders and result in disruption of the welding arc and possibly defective welds.  In addition, it is estimated that arc instability can occur even with fields 10-30 gauss.  To accurately measure low residual magnetism and display magnetism measurement levels before welding use our hand held digital RESIDUMETER®II Gauss Meter. For information or to find out more about our magnetic field measurement devices to prevent welding magnetism problems click on this gauss meter link.

Effectively reduce magnetism levels in a time-efficient manner with a portable welding demagnetizing system.  The ELECTRO-MATIC PRODUCTS CO., "ELMATCO®" welding demagnetizers are designed to eliminate frustration due to welding magnetism problems. ELECTRO-MATIC welding demagnetizers employ a true demagnetizing cycle, an automated process which overcomes the highest levels of magnetism in the welding job and gradually reduces it to an acceptable level for welding.  Other units, as well as techniques using generator power do not demagnetize, but attempt to reverse the magnetic field, often making the magnetism problem worse.  The ELECTRO-MATIC welding demagnetizers have been successfully used in various welding applications including pipelines (oil, gas, chemical) throughout the world and are ideal for demagnetizing all welding magnetism problems. 

Please contact us for your welding demagnetizing needs.