# Group D — Certification marks and hazardous-area classifications: cross-market equivalences

For Group D, stated equivalent is IIA; applies to is Propane, verified against its source on 2026-08-11.

- **Designation:** Group D _(verified: appears in the quote below)_
- **Stated equivalent:** IIA _(verified: appears in the quote below)_
- **Applies to:** Propane _(verified: appears in the quote below)_

## What the source says

> Propane Group D IIA

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Applies to

euroswitch.com says applies to is **Propane**, as of 2026-08-11.

> Propane Group D IIA

Source: https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf

euroswitch.com says applies to is **Methane (mining)**, as of 2026-08-11.

> Methane (mining) Group D

Source: https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf


## Source

- https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Certification marks and hazardous-area classifications: cross-market equivalences](https://referencesource.org/certification-standards-equivalence/).