Welding Fume Extraction System Design Calculation

Weld fume smoke collection systems in portable and stationary designs are available to collect welding fumes from point sources and ambient environments.

Welding fume extraction system design calculation.

There are ways of calculating the correct size. The airflow volume is one of the factors which decides how effective a welding fume extraction system is. Fume extraction systems are included in osha s hierarchy of controls for managing fume and are designed to keep your employees safe and comfortable. Depth of the fume hood.

Reducing fume generation limiting operator exposure to fume. For example when. Although fume extraction may be the first solution that comes to mind other options should be considered as well. Reducing fume generation welding design considerations.

Every application has different requirements. In welding companies there are certain cases in which capturing the welding fumes at the source may not be feasible in practice. Welding guns with built in extraction fume extraction guns or separate suction nozzles of various designs. Approaches to controlling welding fume actually fall into two broad categories.

Recirculating hood system ductless hoods or ventless hoods a self contained air exhaust system that removes grease vapors fumes smoke steam and odors from the. There are two methods of high vacuum extraction. Our complete line of filtair fume extractors are designed specifically for welding drawing weld fumes away from the user s breathing zone and keeping your facility clean. The face opening value is the maximal open width x height for your fume hood while face velocity references the capture distance i e.

Mechanical exhaust ventilation systems design calculations and operational guidelines 2019 page 5 of 30 p. Irrespective of whether the system is for spot extraction or hall ventilation. The airflow volume describes the quantity of air flowing through a pipe over a specified time. Side view of fume distribution for the original design at the low left and high right flow rate on a central plane.

The extraction airflow is approximately 35 to 60 cfm 60 100 m3 hr for integrated fume extraction guns. Table 2 summarises the results of fume capture showing the fraction of fume captured by the extraction system for the original design. Use fume capture nozzles built into the gun tube and handle.