WEBINAR - Understanding and Controlling Toxic Metal Fumes from Welding and Associated Processes


Understanding and Controlling Toxic Metal Fumes from Welding and Associated Processes
May 13, 2020
2:00–3:30 PM Eastern Standard Time



IARC has recently classified welding fumes as a Group 1 Carcinogen, and the recommended Manganese fume exposure limits are orders of magnitude lower than the presently enforceable limit. 

This webinar will discuss various welding processes (MIG, TIG and Stick), welding fume (what is it and how is it generated) and exposure control methods (engineering, administrative and PPE). Attention will be given to the toxic properties of a variety of welding fumes and relevant occupational exposure limits. Special attention will be given to Manganese, is it the new Lead, on Steroids? We will discuss how a significant reduction in welding fume exposure can be achieved through engineering (ventilation) and administrative control methods (worker positioning). Further, we will provide a thorough assessment from a practical viewpoint the hierarchy of Engineering Control methods for exposure abatement of welding fumes as stated in chapter 13 of the ACGIH® Industrial Ventilation: A Manual of Recommended Practice for Design, 30th Edition. A review of the new VS Plate schematic for high-pressure vacuum fume extraction from welding guns will also be discussed. The advantages and disadvantages of respiratory protection options such as filtering facepieces and PAPR will be addressed. Other topics will include the combustibility of welding fume, and the dos and don’ts of particulate air separation media selection for welding fume. Welding fumes (thermally generated combustible particulates) are the most difficult particulate to capture by filtration. This section will educate the participant as to the proper collection methods for capturing and rendering neutral welding fumes. Lastly, we will discuss occupational welding fume exposure levels that can be expected from production welding, and an example of the ratio of Manganese fume to total welding fume from years of MIG generated welding fume.

Learning Objectives

After participating in this webinar, attendees will know:

  • What welding procedures create employee fume exposure concerns 
  • The health effects of welding fume exposure
  • Welding fume enforceable and recommended exposure limits
  • Methods of reducing employee exposure
  • The severity of the exposure control problem that the recommended Manganese exposure limit poses
  • Best materials for achieving welding fume particulate air separation
  • Why the use of fume guns and PAPRs may be the only guaranteed method of reducing Manganese exposure below the recommended limit.  

Who Should Attend this Webinar?

  • Practicing IHs
  • Occupational Safety and Health Professionals 
  • IH and EHS Supervisors 
  • Occupational Medical Doctors, etc.

What is an ACGIH® Webinar?

ACGIH® is dedicated to providing quality, scientific, educational events. One method of doing this is to offer distance-learning webinars. A webinar, short for Web-based seminar, is a presentation, lecture, or seminar that is transmitted over the Internet. A key feature of a webinar is its interactive elements — the ability to give, receive and discuss information. Webinars are as effective as on-site presentations without the travel expense. This ACGIH® webinar is 1.5 hours in duration and consists of a live presentation given via the Internet with an audio telephone link similar to that of a conference call.


This webinar contains 1.5 contact hours and may be eligible for Certified Industrial Hygienist (CIH) CM credit. See the ABIH website (abih.org) for CM credit criteria. This webinar may also qualify for CSP recertification points. See the BCSP website (bcsp.org) for details. Participants seeking confirmation of attendance for the webinar from ACGIH® must attend the live webinar or view the archive and submit a final exam and evaluation. Certificates of Completion will be issued in a timely manner after receipt and completion of these items.