The open book of explosive atmospheres

Written by the world's experts, approved by majority vote, readable in every language. No company owns it. Its members run it.

II Equipment group II: for all hazardous places except mines endangered by firedamp.

Every certified device carries a line like this. Select each part.

Live gas dispersion model. The lines mark 10%, 50% and 100% of the lower explosive limit. Move your pointer to move the leak.

Twelve chapters, open to authors. Each is written by verified experts and goes live only when their peers approve it.

1How explosive atmospheres formOpen to authors
2Flammable gases, vapours and mistsOpen to authors
3Combustible dustsOpen to authors
4Hazardous area classification and zonesOpen to authors
5Protection concepts: d, e, i, m, o, p, q, n, tOpen to authors
6Equipment groups, categories and protection levelsOpen to authors
7Gas groups and temperature classesOpen to authors
8Certification: ATEX, IECEx and national schemesOpen to authors
9Gas detectionOpen to authors
10Flame detectionOpen to authors
11Installation, inspection and repairOpen to authors
12Facilities: oil and gas, chemicals, mining, hydrogen, batteriesOpen to authors

A book with no owner

No editor sits above this book. These rules are its only authority, and members can change them by vote.

Article 1
Free to read
Every chapter is free for everyone, everywhere, in every language.
Article 2
Experts verify experts
Your expertise is confirmed when three verified members of your field vouch for you.
Article 3
Published by majority
A text goes live when most verified reviewers in its field approve it.
Article 4
Written once, read everywhere
Every text is translated into all languages, and native-speaking experts check each translation.
Article 5
No sponsor, no brand
No company can buy, edit or brand the content. Advertising disguised as knowledge is rejected in review.
Article 6
Credit stays with the author
Every revision is signed and traceable. Authors and reviewers are named.