Ventilation For Welding Fumes. General mechanical ventilation must be able to produce as many air changes as possible to do this. This process involves supplying more than half the air to the lower section of the room where it displaces the welding fumes from the area where employees are.
General mechanical ventilation must be able to produce as many air changes as possible to do this. Adequate ventilation keeps exposures to airborne contaminants below allowable limits. Studies show that welding fume particles are mostly smaller than 01 micrometer which makes nearly all welding fume particles respirable.
Local exhaust ventilation LEV is always the preferred method of removing welding fumes and gases.
Studies show that welding fume particles are mostly smaller than 01 micrometer which makes nearly all welding fume particles respirable. Wear appropriate respiratory protective equipment. OSHAs regulations for mechanical ventilation require that welding fumes and smoke must be kept within safe limits. Ventilation Guide for Weld Fume Prepared by AWS Project Committee on Fumes and Gases Under the Direction of AWS Technical Activities Committee Approved by AWS Board of Directors Abstract This document introduces the reader to various types of ventilation systems including general supply and exhaust and local exhaust for control of welding fumes.