Welding Fume Extraction System Design Calculation

Depth of the fume hood.

Welding fume extraction system design calculation.

Approaches to controlling welding fume actually fall into two broad categories. 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. The airflow volume is one of the factors which decides how effective a welding fume extraction system is. Side view of fume distribution for the original design at the low left and high right flow rate on a central plane.

Mechanical exhaust ventilation systems design calculations and operational guidelines 2019 page 5 of 30 p. In welding companies there are certain cases in which capturing the welding fumes at the source may not be feasible in practice. 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.

Weld fume smoke collection systems in portable and stationary designs are available to collect welding fumes from point sources and ambient environments. Reducing fume generation limiting operator exposure to fume. The airflow volume describes the quantity of air flowing through a pipe over a specified time. Welding guns with built in extraction fume extraction guns or separate suction nozzles of various designs.

Every application has different requirements. The extraction airflow is approximately 35 to 60 cfm 60 100 m3 hr for integrated fume extraction guns. There are two methods of high vacuum extraction. For example when.

There are ways of calculating the correct size. Fume extraction systems are included in osha s hierarchy of controls for managing fume and are designed to keep your employees safe and comfortable. Use fume capture nozzles built into the gun tube and handle. Table 2 summarises the results of fume capture showing the fraction of fume captured by the extraction system for the original design.

The face opening value is the maximal open width x height for your fume hood while face velocity references the capture distance i e. However experience with welding fume extraction is equally important. The correct sizing and planning of the ventilation system is therefore crucial.