Material Testing

Flammability: GWT Class / Index

Glow-wire testing to determine ignition temperature class and flammability index.

Flammability: GWT Class / Index

Overview

What this service is

Glow-wire tests sit behind the safety case for a huge range of products — white goods, lighting, control equipment, and household appliances all reference a specific GWFI or GWIT class in their product-family standard.

We run the material-level Glow-Wire Flammability Index (GWFI) and Glow-Wire Ignition Temperature (GWIT) tests, plus end-product glow-wire tests where the standard demands them, and report the class achieved at each temperature step.

Scope

What's included

  • Glow-Wire Flammability Index (GWFI): 550°C, 650°C, 750°C, 850°C, 960°C
  • Glow-Wire Ignition Temperature (GWIT)
  • End-product glow-wire test where required by the standard
  • Sample conditioning per the standard
  • Test report with the class achieved at each step

Deliverables

What you receive

Classification report (PDF) per specimen
Photographic evidence
End-product test report, where applicable

Why it matters

The cost of skipping it

GWT classification is referenced directly in many product safety standards. The wrong class can block your product from entire market segments — white goods, lighting, and control equipment in particular.

Who it's for

Typical clients

Manufacturers of household appliances, lighting, controls, and any product whose product-family standard specifies a GWFI or GWIT class.

Process

How we work

  1. 01
    Intake
    Brief call to scope the product, the market, and the documentation that already exists.
  2. 02
    Analysis
    Gap assessment against the applicable EU directives and harmonised standards.
  3. 03
    Delivery
    Finished file, report, or test results — with a walkthrough call for your team.
  4. 04
    Follow-up
    Corrections and support during external audits or market surveillance.

FAQ

Common questions

Not sure where to start?

Book a 15-minute intro call to discuss your compliance needs.

Book Intro Call