The Portwest BZ31 Bizweld Work FR Trousers are for work near electric arc, heat, flame and molten metal splash, including welding. Flame resistance lasts for the life of the garment, so protection stays in place wash after wash.
An elasticated back waist helps you move freely through the working day. Seven pockets keep tools, rules and your phone close to hand.
Key features
- Dual hazard protection covers both the thermal hazard of electric arc and flame
- Protection against radiant, convective and contact heat for work near hot processes
- Certified protection against molten metal splash
- 40+ UPF rated fabric blocks 98% of UV rays when working outdoors
- Elasticated back waist keeps the trousers secure and supports ease of movement
- Easy access cargo pocket for items you reach for often
- Rule pocket keeps a folding rule to hand
- Concealed phone pocket and two back patch pockets for secure storage
Materials and performance
Bizweld Work fabric: 100% cotton, 330g.
Standards and protection
Certified to EN ISO 11612 (A1+A2, B1, C1, E2, F1), EN ISO 11611 Class 1 (A1+A2), and EN 61482-2 and EN 61482-1-1 with ELIM 8.3 CAL/CM² and ATPV 10.9 CAL/CM². Classed as CE-CAT III personal protective equipment.
Fit and sizing
Regular fit. See our Portwest Sizing Guide for detailed information.
Understanding arc ratings
ELIM is the incident energy level below which the wearer has practically no chance of a burn injury. ATPV is the incident energy at which there is a 50% probability of the onset of a second-degree burn. Compare both figures with your arc flash risk assessment when choosing protective clothing.
Care
- Machine wash at 40°C on a gentle cycle
- Do not bleach
- Do not tumble dry
- Drip dry in the shade
- Iron at a low temperature (max 110°C)
- Do not dry clean
Add your logo
If you’d like to add your logo to the Portwest BZ31 Bizweld Work FR Trousers, please contact us.

































