Welding safety fundamentals: protecting your hearing, lungs and eyes

Welding hurts slowly

The injuries that end welding careers are rarely the dramatic ones. They accumulate: fume settling into lungs across years of shifts, ultraviolet light finding unprotected eyes and skin, workshop noise wearing away hearing that never comes back. None of the three announces itself on the day it happens, which is exactly why UK guidance treats them as matters of planned control rather than personal toughness.

The legal frame is blunt. Employers must protect workers by controlling the health risks from welding fume — and that duty covers specialist welders and anyone who does some welding, no matter how small the amount^[S1]. Welding fume falls under the COSHH regulations^[S1], and where welding is part of the work a risk assessment must identify what measures control the exposure^[S2]. HSE’s welding topic collects the guidance across health and safety risks, from fume to asphyxiation hazards^[S4]. This sheet walks the three exposures in turn — lungs first, because that is where the strongest evidence and the strictest expectations sit.

Lungs: welding fume

The core fact is short enough to memorise: all welding fume can cause lung cancer, and controls must therefore be in place — HSE has issued a safety alert saying precisely that^[S1]. Welding fume can also cause asthma and a range of other health conditions^[S1]. There is no exempt process and no exempt metal: the assessment should consider the process and the volume of work, the size of the component, the metal being welded and the consumable in use^[S2] — but the duty to control exposure stands in every case.

Coatings deserve their own sentence: paint, galvanising, primers and surface contaminants change what is in the fume, which is why material and surface condition are questions in any complete assessment — and why they are questions in this desk’s fume planner too.

The control order — and why it is an order

HSE’s approach to any hazardous substance is a prioritised one: the principles of control rank the options, and you work down the list only as far as you must^[S2]. For welding fume the ranks fall out like this:

• Eliminate. Consider whether the joint needs welding at all: cold joining with mechanical fasteners such as bolts and rivets, or with adhesives, removes the fume at the drawing board^[S2].
• Reduce. Where welding stays: less of it, a consumable that produces less fume, a process that produces less fume, metal properly cleaned and prepared, and automation or mechanisation where it fits^[S2]. Resistance spot welding is the instructive example — it produces much less fume than processes like MIG, and on clean uncoated metal good general ventilation is usually enough for low-intensity spot work^[S2].
• Capture at source. The most effective way to reduce welding fume is to capture it where it is made, protecting the welder and stopping the fume spreading to anyone else^[S2]. The forms match the work: on-torch extraction can be very effective for MIG; extracted benches take the small and medium jobs that can be carried to them; booths with turntables house larger workpieces; and movable LEV with swing-arm hoods works only as well as the hood is placed — and re-placed as the weld moves^[S2]. Air discharged back into the work area must be filtered to negligible particulate levels; discharge outside should leave high enough to disperse^[S2]. Buying, using and testing LEV has its own HSE topic, including commissioning and the checks that keep a system effective^[S3].
• RPE. The last rank, covered next — a supplement to engineering control far more often than a substitute for it^[S2].

RPE — last, not first

Respiratory protective equipment enters when LEV alone cannot achieve adequate control, or where providing LEV is not reasonably practicable^[S2]. Two situations make it non-negotiable. Outdoors, LEV cannot be relied on to capture welding fume at all, so outdoor welding means suitable RPE — and thought for anyone nearby^[S2]. And even a welder working correctly in a capture zone can face residual uncaptured particulate that justifies RPE on top of the LEV^[S2].

On selection, the guidance is specific enough to be useful. For arc welders the best option is a powered air or supplied air respirator combining respiratory, eye and face protection with an assigned protection factor of at least 20 — tight-fitting RPE grows uncomfortable across a shift, and uncomfortable RPE gets loosened or removed^[S2]. For work not expected to exceed an hour, an FFP3 disposable mask or a reusable half-mask with a P3 filter may be adequate against particulate if the wearer is clean-shaven — but particulate filters do nothing against the gases in welding fume^[S2]. Tight-fitting devices need face-fit testing for each wearer, inside an RPE management programme: fit testing, spares such as batteries and filters, clean storage, and compatibility with the other PPE on the same head — the welding visor above all^[S2].

Regular versus occasional welding

HSE draws a practical line between two working patterns^[S2]. Regular welders — welding for most of a shift, across different jobs — face regular, significant exposure and need engineered controls to protect them from occupational lung disease. Sporadic welders, for whom welding is incidental and infrequent, sit differently: engineered fume controls are not normally expected for occasional welding done less than once a week and lasting under an hour — but in those situations RPE and good general ventilation must be provided, the ventilation must actually remove and disperse the fume, and people nearby must still be considered^[S2].

Read that as a differently-shaped duty, not a day off. The fume planner surfaces this route only as something for a competent person to assess — never as an exemption.

Eyes: arc light

A welding arc emits intense ultraviolet and infrared light, direct and reflected — the cause of the corneal burn every welder knows as arc-eye. The controls come in layers^[S2]:

• Filters and clothing for the welder. Eye protection with welding filters — fixed shade or auto-darkening — should conform to the relevant British and European standards; protective clothing keeps UV off arms and legs; and goggles belong on your face when chipping slag or wire-brushing welds, because those jobs throw particles rather than light^[S2].
• Screens for everyone else. The purpose of a welding curtain or screen is to protect passers-by and nearby workers from the arc light. Screens should conform to BS EN ISO 25980 or offer equivalent protection; semi-transparent screens let others see that someone is welding while filtering the harmful part of the light, and where nobody needs to see in, darker or opaque screens are the right choice. The standard sets performance, not colour — and HSE notes it is not aware of any completely clear curtain that conforms^[S2]. Counting panels for a zone is the screen planner’s job.
• The room itself. Dark-coloured wall coatings reduce reflected UV where the layout allows^[S2].

Hearing

Fabrication is a loud trade even before the arc strikes: grinding, gouging, hammering, needle-gunning and cutting all share the same bay. HSE’s noise-at-work guidance requires an employer to assess the risk, reduce exposure at source where reasonably practicable, provide hearing protection where it is required and maintain the controls^[S5]. Hearing protection is the remaining layer, not a substitute for quieter methods, isolation or engineering control.

Protective equipment also has to work as a system. HSE’s RPE guidance makes compatibility between items of PPE explicit — the welding visor is its own example^[S2]. Ear defenders that will not seat under a helmet, or that disturb a respirator’s face seal, solve one problem by creating another. The noise assessment and the PPE selection need to consider the complete head-borne set used for the task.

People nearby

Fume and arc light do not stay with the welder. For workers near welding — including operators of automated or mechanised machines — RPE is unlikely to be needed only where effective general ventilation gives rapid fume clearance and a through draught, or where they work far enough away that no fume haze lingers near them^[S2]. In most welding workshops, natural ventilation through doors and windows is not sufficient: mechanical general ventilation — fans extracting room air and drawing in clean air — is what the guidance expects^[S2]. Unprotected people should be excluded from welding areas outright^[S2], and the screens of the previous section handle the light on the way past.

What no page can decide

Everything above is the order of the questions — it is not, and cannot be, the answers for your workshop. Whether a given control achieves adequate control of exposure in your building, for your process, at your volumes, is a matter for a risk assessment under COSHH and for a competent person, working from the HSE guidance itself^[S1][S2]. This desk issues planning records that order the options and name the unresolved inputs; it issues no verdicts, and nothing on this page says any arrangement of yours is acceptable. The boundaries that hold across every tool and sheet here are collected on the safety & limitations sheet.