FRISTADS T-SHIRT FLAMESTAT DEVOLD® 7431 UD Black - Class 1

Fristads Flamestat Devold 7431 UD T-Shirt, Class 1 Arc Rated

The Fristads Flamestat Devold 7431 UD is a lightweight, very elastic t-shirt approved as an arc-rated Class 1 garment under EN 61482-1-2, with further certification to EN ISO 11612 and EN 1149-5. Fristads is one of the arc-rated workwear brands we distribute in Ireland, and this shirt sits in our arc flash protection range as a base layer for substation, switchroom, and electrical maintenance work.

What the Three Standards Certify

• EN 61482-1-2 Class 1, the box test for arc flash protective clothing. This is the garment’s arc rating.
• EN ISO 11612 rated A1 A2 B1 C1, covering protection against heat and flame: limited flame spread, convective heat, and radiant heat.
• EN 1149-5, electrostatic properties, so the shirt dissipates static charge, relevant in ATEX-adjacent areas and around sensitive plant.

Specification

Where It Fits in Your PPE

Shirts like this are typically worn as the innermost layer, under arc-rated jackets, coveralls, or switching suits from our arc flash protection range. The merino wool content helps with next-to-skin comfort, while the Viscose FR and polyamide keep the flame resistance intact through repeated wear. If an arc flash study or PPE assessment has specified Class 1 garments, this shirt meets the garment-level requirement. For a plain-English explainer on the hazard itself, see what is arc flash. Always confirm the required rating against the incident energy at each substation or switchroom location.

FAQs

Is this t-shirt arc rated or just flame resistant?

Arc rated. The garment is approved to EN 61482-1-2 Class 1, the box test for arc-flash protective clothing, and also carries EN ISO 11612 for heat and flame protection and EN 1149-5 for electrostatic behaviour. That combination is what separates it from a standard FR base layer.

Can it be worn on its own for switching tasks?

Treat it as a base layer. It is Class 1 to the EN 61482-1-2 box test, which defines the garment’s own rating, but your arc flash study or site safety rules determine what clothing system is required. Many crews wear it under an arc-rated jacket or switching suit.

Not exactly what you are looking for? Contact us with your exact requirements, we’re happy to help.