Hydrogen · IEC / ATEX · 520

For Hydrogen, classification system is IEC / ATEX; ignition temperature (c) is 520; apparatus / gas group is IIC; ignition temperature (f) is 968, recorded from its source on 2026-08-06; source re-checked 2026-10-05.

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

Apparatus / gas group

The source prints this value inside the passage below but does not name it there. The passage shows where it appears; what ties it to this record is the position on the page, not anything the passage says.

Hydrogen | B | 520 | 968 | 6,000 PSI | IIC

— ldpi-inc.com, retrieved 2026-08-06

Source

• ldpi-inc.comhttps://ldpi-inc.com/resources/classification-codes/class-1-locations/

Last verified against source: 2026-10-05. Due for re-check by 2028-10-04. This page as Markdown · OKF bundle · full dataset as JSON.