Welding Workwear Guide: EN ISO 11611 Levels and Fabric Choices
The short answer
Welding workwear is certified to EN ISO 11611, in Class 1 for light welding and Class 2 for heavier work with more spatter. The fabric is usually heavyweight cotton, FR-treated cotton, or an aramid blend, and it must be paired with certified FR reflective tape if the site also requires hi-vis. The two mistakes that cause failures are buying treated fabric and laundering it incorrectly, and using standard tape on an FR garment.
Welding protection is a system: jacket, trousers or apron, sleeves, gloves and a welding hood. Each part has its own standard, and the jacket alone does not make a welder safe.
Last updated: October 2026.
Key takeaways
- Class 1 versus Class 2 reflects the severity of the welding task and the spatter exposure.
- Heavier fabric is not automatically better; heat stress matters in confined spaces.
- FR tape, not standard tape, if the garment also claims hi-vis.
- Laundering controls performance with treated fabrics.
- Leather aprons and sleeves often cost less than upgrading the whole garment specification.
1. Hazard vs specification vs purchasing notes
| Hazard | Recommended specification | What to check when buying |
|---|---|---|
| Welding spatter | EN ISO 11611 Class 1 or 2, A1 or A2 flame-spread code | Class and code printed on the garment |
| Molten metal in heavy fabrication | Higher fabric weight, leather apron and sleeves | Whether an apron is cheaper than upgrading the jacket |
| Radiant heat from adjacent processes | EN ISO 11612 with C codes | The code set, not only the standard number |
| Visibility on site | FR reflective tape, certified | Tape certificate and position |
| Oil and grease exposure | Flame-resistant, oil-repellent finish | Effect of the finish on FR performance |
| Industrial laundering | EN ISO 15797 data | Care label matching the laundry process |
2. Fabric choices for welding garments
| Fabric | Protection | Comfort | Typical use |
|---|---|---|---|
| Heavyweight cotton, untreated | Basic, can ignite | Good in heat | Light duty, low spatter |
| FR-treated cotton | Good, depends on laundering | Good | General welding |
| Aramid or FR viscose blend | High, inherent | Lower in heat | Heavy fabrication, petrochemical |
| Leather apron or sleeves | High against spatter | Heavy and hot | Over any FR garment |
3. What to specify on a purchase order
| Item | Specification to write | Why |
|---|---|---|
| Standard and class | "EN ISO 11611 Class 2 A1" | Removes ambiguity about the task severity |
| Fabric | Composition, weight and treatment type | Treated and inherent fabrics behave differently |
| Tape | FR-certified if hi-vis is required | Standard tape can melt |
| Design | Cuffs, collar, closures and pocket placement | Open pockets catch spatter |
| Care | Laundering instructions that preserve FR performance | The main cause of failure in service |
| Extras | Apron, sleeves, hood compatibility | Cheaper than over-specifying the jacket |
4. Frequently asked questions
What standard covers welding clothing?
EN ISO 11611 covers protective clothing for welding and allied processes, including spatter, molten metal droplets and brief flame contact. Garments are classified as Class 1 or Class 2.
What is the difference between Class 1 and Class 2 welding clothing?
Class 2 is tested to a more severe condition and is intended for heavier welding with more spatter. Class 1 suits lighter work with less exposure.
Is cotton or aramid better for welding?
Untreated cotton is not protective enough for regular welding. Treated FR cotton is the common economical choice, and aramid blends offer inherent protection with better durability in heavy fabrication.
Can I use hi-vis tape on FR welding clothing?
Only certified FR tape. Standard retro-reflective tape can melt or degrade under heat, which defeats both the visibility and the FR purpose.
Does welding clothing need special washing?
Yes, particularly for treated FR fabrics. Incorrect washing can remove the treatment, so the care label must match the actual laundering process, especially in rental programmes.
Get welding garments quoted to the right class
Tell us the welding process, the spatter level and whether hi-vis is required, and we will quote the correct class with the FR tape and care instructions stated in the quotation.
