Welding Fume – what’s changed?
There is new scientific evidence (from the International Agency for Research on Cancer or IARC) that exposure to all welding fume, including mild steel welding fume, can cause lung cancer, as well as some evidence linked to kidney cancer.
The Workplace Health Expert Committee (WHEC), which was set up to provide the HSE with independent, authoritative and impartial expertise on workplace health, has endorsed the reclassification of mild steel welding fume as a human carcinogen and prompted the regulator to issue a safety alert STSU1 – 2019, which ramps up the HSE’s enforcement expectations
As a result, there is a change in HSE enforcement expectations in relation to the control of exposure of welding fume, including that from mild steel welding. With immediate effect, there is a strengthening of HSE’s enforcement expectation for all welding fume, including mild steel welding; because general ventilation does not achieve the necessary control.
All businesses undertaking welding activities should ensure effective engineering controls are provided and correctly used to control fume arising from those welding activities. Where engineering controls are not adequate to control all fume exposure, adequate and suitable respiratory protective equipment (RPE) is also required to control risk from the residual fume.
Control of the cancer risk will require suitable engineering controls for all welding activities indoors e.g. Local Exhaust Ventilation (LEV). Extraction will also control exposure to manganese, which is present in mild steel welding fume, which can cause neurological effects similar to Parkinson’s disease.
Where LEV alone does not adequately control exposure, it should be supplemented by adequate and suitable respiratory protective equipment (RPE) to protect against the residual fume.
Appropriate RPE should be provided for welding outdoors. You should ensure welders are suitably instructed and trained in the use of these controls.
Regardless of duration, HSE will no longer accept any welding undertaken without any suitable exposure control measures in place, as there is no known level of safe exposure.
Risk assessments should reflect the change in the expected control measures.
What does this mean to you?
- Make sure exposure to any welding fume released is adequately controlled using engineering controls (typically LEV).
- Make sure suitable controls are provided for all welding activities, irrespective of duration. This includes welding outdoors.
- Where engineering controls alone cannot control exposure, then adequate and suitable RPE should be provided to control risk from any residual fume.
- Make sure all engineering controls are correctly used, suitably maintained and are subject to thorough examination and test where required.
- Make sure any RPE is subject to an RPE programme. An RPE programme encapsulates all the elements of RPE use you need to ensure that your RPE is effective in protecting the wearer.