There is new scientific evidence from the International Agency for Research on Cancer that exposure to mild steel welding fume can cause lung cancer and possibly kidney cancer in humans.
Therefore the Health and Safety Executive board are strengthening it's enforcement expectation for all welding fume, including mild steel welding; because general ventilation does not achieve the necessary control.
- 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, irrelevant 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.
Please read the full HSE's safety alert here.