In which scenario are local exhaust systems typically used in welding?

Local exhaust systems are primarily designed to capture and remove contaminants generated during welding processes, which include harmful gases, fumes, and particulates. The operation of welding produces hazardous emissions that can pose serious health risks to welders if inhaled. By utilizing a local exhaust system, these contaminants are efficiently extracted at the source before they can disperse into the general working environment, thus significantly improving air quality and safeguarding the health of personnel.

The focus on capturing contaminants especially highlights the importance of workplace safety standards in welding practices. Without such systems, welders would be exposed to potentially toxic fumes that could lead to respiratory issues and other health complications over time. Therefore, local exhaust systems are an integral aspect of promoting a safe and healthy welding environment.