Resources

Proper Weld Fume Extractor and Welder Positioning

CWA National Seminar 2017

March 16, 2017 CWB Group Nisku Learning Centre 206- 19th Ave Nisku Industrial Park Nisku, AB T9E 0W8 Canada

Canadian Emissions Regulations

Rebates Help Canadian Manufacturers Meet Environmental Regulations by Duncan Beaumont New environmental regulations with stricter air pollution standards are pushing manufacturers in Ontario and other provinces to reduce emissions of eight common industrial contaminants. Is your facility in compliance? If you are still using an exhaust and makeup air system as your only solution to … Continue reading "Canadian Emissions Regulations"

6 Source Capture Options for Weld Fume Extraction

Which Method Is Right for You? There is a variety of source capture weld fume extraction equipment available today, and it can be difficult to know which specific type is best for you. We broke down the six most popular types, including pros and cons, and one method you should absolutely avoid. 1.     Backdraft Hoods … Continue reading "6 Source Capture Options for Weld Fume Extraction"

Proper Weld Fume Extractor and Welder Positioning

Proper Weld Fume Extractor and Welder Positioning for Source Capture Maximizing Indoor Air Quality for Your Welders To get the best results from a source capture system, proper positioning of both the weld fume extractor and the welder are an important, but often overlooked, consideration. To maximize effectiveness and get the most from your investment, … Continue reading "Proper Weld Fume Extractor and Welder Positioning"

HomeResourcesBlogsProper Weld Fume Extractor and Welder Positioning

Proper Weld Fume Extractor and Welder Positioning

Proper Weld Fume Extractor and Welder Positioning for Source Capture

Maximizing Indoor Air Quality for Your Welders

To get the best results from a source capture system, proper positioning of both the weld fume extractor and the welder are an important, but often overlooked, consideration. To maximize effectiveness and get the most from your investment, take the following positioning guidelines into account.

Proper Welder Positioning

When possible, the welder should position him or herself in a way that minimizes cross ventilation. Cross ventilation is air flow interference which directs the weld fume and smoke away from its intended capture point. For instance, if source capture equipment is north of the weld point and a breeze is blowing from southeast to northwest, the welder should position him or herself at the southeast corner of the welding area to minimize that cross ventilation.

It’s important to note that a cross draft may sometimes be beneficial in weld fume capture. For instance, if source capture equipment is again north of the weld point, a southern to northern draft will help guide fumes away from the welder and towards the capture equipment.

Using a welding enclosure can virtually eliminate any detrimental (or positive, for that matter) cross ventilation. If manual welding is taking place in an enclosure, it’s important to use source capture equipment strong enough to recycle fume and smoke before it builds up in the respiratory zone.

Proper Source Capture Weld Fume Extractor Placement

The most important aspect of weld fume extractor placement is to ensure that it is not pulling fume and smoke through the welder’s respiratory zone. If moveable fume arms or hoods are utilized, the capture point should be above the arc and positioned at approximately 45 degrees.

The most beneficial distance from arc to capture point will vary depending on a variety of factors, like air volume and velocity. A general rule of thumb for source capture placement is 1.5 duct diameters away. Professionals can help determine the best placement of your equipment during the assessment process.

Additional Resources

This information was first shared in the RoboVent webinar How to Capture Weld Fume at the Source. The complete version is available here.

To learn more about weld fumes, how they affect your IAQ and what you can do about them, make sure to watch RoboVent’s 5-part webinar series on the subject, available at robovent.com/resources/webinars/.