08
Dec
Local Exhaust Ventilation For Welding. This system shall be of sufficient capacity and so arranged as to remove fumes and smoke at the source and keep the concentration of them in the breathing zone within safe limits as defined in Subpart D of this part. Local forced air ventilation is a local air moving system. A wall fan is an example of Local Forced Air Ventilation. This literature review presents data on the performance of a variety of LEV systems for welding fume control from the construction five references shipyard five references and other industries.
When welding outdoors in the open air LEV is usually not a practical option for fume capture use RPE as a suitable alternative choice of control. 2 shows emission of welding fumes through the flexible duct away from the site of operation to the Fig1 A. Flexible ducting allows the capture hood to be moved where required. Local forced air ventilation is a local air moving system. If playback doesnt begin shortly try restarting your device. A fan moves fresh air horizontally across the welders face.
This is also known as extraction or fume control.
Have well designed local exhaust ventilation LEV. 2 shows emission of welding fumes through the flexible duct away from the site of operation to the Fig1 A. Provide an air velocity of at least. Have well designed local exhaust ventilation LEV. Local exhausts are the most effective ventilation systems for all situations that generate fumes con. Local exhaust ventilation shall consist of freely movable hoods intended to be placed by the welder or burner as close as practicable to the work.