Subscribe to our newsletter to receive the latest news and events from TWI:

Subscribe >
Skip to content

Controlling Exposure to Hexavalent Chromium in Welding Fume

Project Code: 31009


Review international legislation, guidance and best practice on control of Cr(VI) in the workplace.

Review and compile workplace exposure limits (WELs) or occupational exposure limits (OELs) for Cr(VI) worldwide.

Establish levels of Cr(VI) from a number of arc welding processes, to include MMA, TIG and MIG/MAG, over a range of parameters.

Assess the efficiency of local exhaust ventilation (LEV) and respiratory protection equipment in combination to meet a range of WELs for Cr(VI).

Provide clear guidance and evidence of the control measures required to meet current and proposed International limits for Cr(VI).

Project Outline

The project will demonstrate, by measurement, the effectiveness of different methods for control of exposure to Cr(VI) during arc welding, and identify where problems in meeting exposure limits may occur. As well as LEV and personal protective equipment, the use of fume extraction torches will be investigated. Guidance will be provided on the selection and use of appropriate control methods for each exposure scenario.

Relevant Industry Sectors

Oil and Gas; Pipelines; Power Generation; Transport; Infrastructure; Defence

Technical and Economic Benefits

The work will enable users of arc welding to identify suitable approaches to comply with increasingly stringent regulations on exposure to Cr(VI).


Controlling Exposure to Hexavalent Chromium in Welding Fume 1116/2019


Research Board Information

Original proposal

2017 Research Committee Report

2017 Research Committee slides

2018 Research Committee Report

2018 Research Committee slides

Draft report 31009/1/18


Technical and Economic Benefits

Improved understanding and awareness of the capabilities and applications of friction welding for the additive manufacture of components.

Improved effectiveness and wider application of additive manufacture by friction technologies, leading to reduced material usage, and associated time/cost savings and environmental benefits.

Potential for novel component design and improved component performance via development and optimisation of friction welding techniques.

For more information please email: