Employers Urged to Protect Workers from Cancer-Causing Welding Fumes

THE Institution of Occupational Safety and Health (IOSH) is urging employers to ensure workers are protected from cancer-causing welding fumes as enforcement of raised control standards take effect this week.

The enforced control measures for welding operations have been introduced by the Health and Safety Executive (HSE).

The change follows an announcement from the International Agency for Research on Cancer (IARC), classifying welding fumes and UV radiation from welding as Group 1 carcinogens. IARC published their findings in Lancet Oncology in 2017 in a paper titled ‘Carcinogenicity of welding, molybdenum trioxide, and indium tin oxide’.

Details of HSE’s announcement on the raised enforced control standards include:

  • All forms of welding fume can cause cancer.
  • Control is required where:
    • Indoor welding tasks require the use of LEV. If LEV is unable to control fume capture then Respiratory Protective Equipment (RPE) is also required.
  • Outdoor welding requires use of RPE.
  • Enforcement of the raised control standards is with immediate effect under Control of Substances Hazardous to Health (COSHH) Regulation 7.

The HSE will issue a ‘Safety Alert’ in the near future and control requirements will be communicated through the HSE website. The HSE is also currently developing an intervention plan.

Duty holders are advised to follow guidance in the BOHS Welding Fume Control Selector Tool which is available via the Breathe Freely website.


Michael Edwards, IOSH’s Occupational Safety and Health Content Developer, said: “The raised control standards for welding fumes are now in effect for organisations within the UK and will have implications to a whole range of different industries where welding operations occur. Further efforts must be made to protect workers involved in welding as part of their roles.

“IOSH urges employers in the UK to review current welding control measures in place to ascertain that they meet these raised control standards. This may also mean that risk assessments and risk registers may need updating to ensure that they reflect the new requirements.”

Work-related cancers harm families and communities, and cause unnecessary loss of people, skills and experience from workforces.

IOSH’s No Time to Lose campaign aims to get carcinogenic exposure issues more widely understood and help businesses take action. The current phase of the campaign focuses on raising awareness about the implications of asbestos exposure, with previous phases covering the deadly consequences of exposure to silica dust, solar radiation and diesel exhaust emissions.



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