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. Table 2 summarises the results of fume capture showing the fraction of fume captured by the extraction system for the original design. Approaches to controlling welding fume actually fall into two broad categories. Use fume capture nozzles built into the gun tube and handle.

The airflow volume is one of the factors which decides how effective a welding fume extraction system is. 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. Although fume extraction may be the first solution that comes to mind other options should be considered as well. Side view of fume distribution for the original design at the low left and high right flow rate on a central plane.

The face opening value is the maximal open width x height for your fume hood while face velocity references the capture distance i e. Welding guns with built in extraction fume extraction guns or separate suction nozzles of various designs. The calculation for the cfm of a fume hood is obtained by multiplying the face opening window of the fume hood and the face velocity. Reducing fume generation limiting operator exposure to fume.

The correct sizing and planning of the ventilation system is therefore crucial. The extraction airflow is approximately 35 to 60 cfm 60 100 m3 hr for integrated fume extraction guns. 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. Every application has different requirements.

Reducing fume generation welding design considerations. Fume extraction systems are included in osha s hierarchy of controls for managing fume and are designed to keep your employees safe and comfortable. In welding companies there are certain cases in which capturing the welding fumes at the source may not be feasible in practice. Depth of the fume hood.

Mechanical exhaust ventilation systems design calculations and operational guidelines 2019 page 5 of 30 p. There are two methods of high vacuum extraction. The airflow volume describes the quantity of air flowing through a pipe over a specified time.