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Exposure to electromagnetic fields in arc welding.

M A Stuchly1, D W Lecuyer

  • 1Bureau of Radiation and Medical Devices, Health and Welfare Canada, Ottawa, Ontario.

Health Physics
|March 1, 1989
PubMed
Summary
This summary is machine-generated.

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Measurements around 22 arc welders show that electric fields are typically low, but magnetic flux densities can be high. Several devices produced magnetic fields (200-400 microT) indicating significant occupational exposure risks.

Area of Science:

  • Occupational Health and Safety
  • Electromagnetism
  • Industrial Hygiene

Background:

  • Arc welding processes generate electric and magnetic fields (EMFs) at power line frequencies (60 Hz) and their harmonics.
  • Understanding EMF exposure levels is crucial for assessing potential health risks in occupational settings.

Purpose of the Study:

  • To measure and characterize electric field strengths and magnetic flux densities around various arc welding devices.
  • To compare measured EMF levels with typical environmental and occupational exposure guidelines.

Main Methods:

  • Conducted field measurements around 22 different arc welding machines.
  • Measured electric field strengths (V m-1) and magnetic flux densities (microT).

Main Results:

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  • Electric field strengths were generally low (around 1 V m-1), with one exception reaching 300 V m-1.
  • Magnetic flux densities varied widely, from microT to a few hundred microT.
  • Several welders emitted high magnetic flux densities (200-400 microT), levels seldom found in general environments.

Conclusions:

  • Arc welding can be a significant source of high magnetic flux density exposure for workers.
  • The findings highlight the need for awareness and potential mitigation strategies for occupational EMF exposure from welding equipment.