This standard specifies safety requirements for transparent welding curtains, strips and screens to be used for shielding of work places from their surroundings where arc welding processes are used. They are designed to protect people who are not involved in the welding process from hazardous radiant emissions from welding arcs and spatter. Welding curtains, strips and screens specified in this standard are not intended to replace welding filters. For intentional viewing of welding arcs from a distance of less than 2 m welders protection filters should be used which are specified in EN 169. The present standard is not applicable for welding processes where laser radiation is used. Darker curtains or screens should be used for mutual separation of adjacent work places for reasons of comfort.