Conference Agenda

Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).

Session Overview
TS 6: Seminar 6
Wednesday, 22/June/2022:
2:00pm - 3:30pm

Location: City Hall

Session Topics:
Track A: Industrial Ventilation for Process Applications (occupational health, environmental emissions, innovations, best practices, etc)

Track A: Industrial Ventilation for Process Applications (occupational health, environmental emissions, innovations, best practices, etc) 


Control And Understanding Toxic Metal Fume Emissions And Exposure From Welding And Associated Processes

Robert Dayringer, Jonathan Hale

ACGIH, United States of America

This presentation will discuss various welding processes, their inherent danger of exposure and review the Engineering control methodology with the ACGIH recommendations of how to mitigate such exposure. Since IARC has recently classified weld fume as a carcinogen, the presentation will investigate a newly sanctified VS-plate technique recently incorporated into the ACGIH Industrial Ventilation Manual. It will also investigate the design criteria of the hierarchy of controls recommended for mitigation of weld smoke/fumes and the filtration physics.

That will all be set within the context of the new threshold limit for Manganese which has now been set at more hazardous than Lead exposure. Manganese exposure, which causes Parkinson's like symptoms, is widespread around the world with exposures and controls largely misunderstood. The presentation integrates all of the control technique strategies into easily understood, well organized fashion.

A new strategy is highlighted utilizing high-pressure vacuum system that connects directly to the weld gun itself. High pressure dust collectors are investigated, as well.

Dust Collection Safety: Fire Suppression, Spark Control and Explosion Mitigation

Mike Meyer


Dust collector fires and explosions are a serious safety risk, especially when collecting combustible dust. In this session, we’ll review OSHA and NFPA regulations for dust collector design and fire and explosion safety. Then, we’ll provide an overview of safety element options, including fire suppression systems, spark control solutions and deflagration system elements. Participants will learn how to know which elements are best for their application and how to design an NFPA-compliant dust collection system. Includes real-world examples and Q&A. We’ll cover:

- Combustible dust regulations, including NFPA 61, 68, 69, 652 and 654 and the OSHA National Emphasis Program.

- Dust Hazard Analysis requirements and steps

- The elements of the “explosion pentagon” and how a dust explosion occurs

- Combustible dust classes and examples

- Required dust collector explosion and fire safety elements for collection of combustible dust

- Options for fire supression systems, including water, CO2 and clean agent gas, and pros and cons of each

- A comparison of spark suppression technologies