Class III
For Class III, category is dust group; iec / atex designation is IIIA; basis or note is Fibers and flyings, recorded from its source on 2026-08-06.
- Category
- dust group our reading
- North American designation
- Class III verified
- IEC / ATEX designation
- IIIA verified
- Basis or note
- Fibers and flyings
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
Gas / dust group | Typical Substances | IIC | Acetylene | Class I, Group A | Acetylene | IIB + H 2 | Hydrogen | Class I, Group B | Hydrogen | IIB | Ethylene | Class I, Group C | Ethylene | IIA | Propane | Class I, Group D | Propane | IIIC | Conductive dust | Class II, Group E | Combustible metal dust | IIIB | Non-conductive dust | Class II, Group F | Combustible carbonaceous dust | Class II, Group G | Combustible dusts not in group E or F | IIIA | Combustible flyings | Class III |
— e2s.com, retrieved 2026-08-06
Source
- e2s.comhttps://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups