Industrial devices for induction heating are examples of common sources of exposure to Electromagnetic fields (EMF). Directive 2004/40/EC on health and safety requirements for workers exposed to EMF was adopted in 2004. In power stations metallic pipes were used for water transport. They were subjects to constant repair or replacement, necessitating arc welding. Inductors comprising a few wire coils had to be mounted at a distance of a few centimetres from the ends of welded pipes. Welding process was commonly hand operated by two welders working approximately 30–50 cm from the work surface. During a workplace health and safety evaluation induction heaters used for pre-heating arc-welded pipes were identified as EMF exposure sources. The action was taken by the management of the company at the initiative of welders who work in the vicinity of induction heaters pre-heating arc-welded pipes, and exposed to EMF. It was decided to reduce exposure at its source, financed from company budget, and with the help of external experts.