T6

For T6, market / system is IEC / ATEX; applies to is 85°C, verified against its source on 2026-08-11.

What the source says

IEC / ATEX System | Continuous hazard | Class I Division 1 | Zone 0 | Frequent hazard | Class I Division 1 | Zone 1 | Occasional hazard | Class I Division 2 | Zone 2 | Zone systems offer more precise classification of hazard frequency , while the Class/Division system is simpler and historically used in North America. Gas Group Equivalency NEC Group | IEC Group | A (Acetylene) | IIC | B (Hydrogen) | IIC | C (Ethylene) | IIB | D (Propane) | IIA | Temperature Classes Electrical equipment must also be rated according to maximum surface temperature to prevent ignition. Temperature Class | Max Surface Temp | T1 | 450°C | T2 | 300°C | T3 | 200°C | T4 | 135°C | T5 | 100°C | T6 | 85°C |

— inframena.com, retrieved 2026-08-11

Source

• inframena.comhttps://www.inframena.com/hazardous-area-classification-equivalency-guide/

Last verified against source: 2026-08-11. Due for re-check by 2027-08-11. This page as Markdown · OKF bundle · full dataset as JSON.