Welding Fume Guides
Resources · Resources overview
Welding fume guides for UK health and safety managers, welding engineers, occupational hygienists and fabrication employers. This hub organises our editorial library across welding fume basics, monitoring and air sampling, ventilation and LEV, metal and process fumes, oil mist and engineering aerosols, and compliance and health risk guidance. Each guide is written as a working reference rather than marketing copy, with consistent terminology aligned to COSHH and EH40.
How to use this guide library
The library is grouped by topic cluster rather than by job title. If you are scoping a welding fume programme from scratch, start with welding fume basics and the monitoring cluster. If you are reviewing existing controls, the ventilation and LEV cluster and the compliance cluster will be more directly useful. The metal and process fume cluster is where you will find substance-specific context for stainless, manganese, chromium and nickel exposure.
Each linked guide is written in plain technical English and is intentionally short of generic marketing claims. The aim is to give a working professional something they can use to brief a team, structure a risk assessment, or sense-check an existing welding fume strategy without wading through corporate boilerplate.
Welding fume basics
Foundational material on what welding fume is, why it is treated as a workplace health concern, and how exposure builds up across a working shift. Use these guides to align internal language before moving into monitoring, control selection or compliance reviews.
- Welding fumes — composition, processes and workplace exposure context.
- Welding risk assessment — building a COSHH assessment around welding tasks.
- Welder exposure testing — breathing-zone sampling for the people doing the work.
Monitoring and air sampling
Practical guidance on personal welding fume monitoring, welding air sampling methodology and how exposure data feeds back into control decisions. These guides explain what monitoring can and cannot tell you, and how to scope a sampling round so that the result is defensible rather than indicative only.
- Welding fume monitoring — programme design and reporting against EH40.
- Welding air sampling — pumped personal sampling and inhalable metal fume capture.
- Engineering air monitoring — mixed aerosol environments in workshops.
Ventilation, LEV and extraction
Reference material on welding ventilation strategy, LEV thorough examination and the practical performance of common welding extraction options. Ventilation and LEV are treated here strictly as welding fume control methods, not as a general HVAC topic.
- Welding ventilation — on-torch capture, general ventilation and workshop strategy.
- Welding extraction systems — on-torch, hood, downdraft bench and central LEV.
- Welding LEV testing — thorough examination and test under COSHH Regulation 9.
Metal and process fumes
Substance-specific context for the metals most often driving welding fume risk in UK fabrication and engineering. These guides describe what is in the fume, why it matters in exposure terms, and what monitoring scope is sensible when the consumable or base material changes.
- Metal fumes — overview of airborne metals from welding and fabrication.
- Stainless steel welding fumes — chromium, nickel and Cr(VI) considerations.
- Manganese fumes — mild steel welding and EH40 considerations.
- Chromium compounds — hexavalent chromium and COSHH carcinogen controls.
- Nickel compounds — soluble and insoluble nickel exposure in alloy work.
Oil mist and engineering aerosols
Welding fume rarely sits in isolation in an engineering workshop. These guides cover oil mist and metalworking fluid aerosol exposure where the same workforce is also exposed to machining aerosols alongside welding fume. They are written for mixed-aerosol environments rather than as standalone machining content.
- Oil mist monitoring — personal sampling in machine shops.
- Metalworking fluids — neat oils, soluble and synthetic MWF exposure.
- CNC coolant mist — high-speed machining aerosols and enclosure performance.
Compliance and health risk guidance
Guidance on the regulatory frame around welding fume — COSHH duties, HSE enforcement expectation since 2019, and the substance-specific limits in EH40. The health risk material here is exposure-focused; the site does not provide medical interpretation, biomarker analysis or employee health surveillance content.
- Welding health risks — respiratory and metal fume context.
- Welding compliance — COSHH duties, HSE expectation and EH40 metal WELs.
- Fabrication fume exposure — workshop-wide programme considerations.
Frequently asked questions
Where should a new welding fume programme start?
Most programmes start with a written welding risk assessment under COSHH, then a baseline round of personal welding fume monitoring scoped to the metals actually present in the workplace, followed by a review of LEV and extraction performance against the exposure picture that emerges.
Do these guides replace formal occupational hygiene advice?
No. They are editorial reference material to support competent decision-making, not a substitute for site-specific assessment by a qualified occupational hygienist or LEV examiner.
Related pages