Ninu mejeeji gaasi ati awọn ẹka iwọn otutu, BT4 koja AT3, nitorina pese igbelewọn-ẹri bugbamu ti o ga julọ.
III | C | T 135 ℃ | Db | IP65 |
---|---|---|---|---|
III Eruku oju | T1 450℃ | Ma | IP65 | |
T2 300 ℃ | Mb | |||
T3 200 ℃ | ||||
A Flammable ń fò flocs | Ati | |||
T4 135 ℃ | ||||
Db | ||||
B Non conductive eruku | T2100 ℃ | Dc | ||
C eruku conductive | T6 85 ℃ |
Kilasi A pẹlu awọn gaasi bii ethane, kẹmika kẹmika, ethanol, ati petirolu; Kilasi B ni awọn gaasi bii gaasi ibugbe, ethylene, ati oxide ethylene.
The T3 temperature classification applies to environments up to 200℃ and includes 36 common gases such as gasoline and butyraldehyde. The T4 classification limits temperatures to 135℃, also for 36 gases including acetaldehyde and tetrafluoroethylene.