ISO 14224 Failure-Code Reference — the full taxonomy (39 codes)

ISO 14224 is the international standard for collecting and exchanging reliability and maintenance data for equipment in the petroleum, petrochemical and natural-gas industries — and it has become the de-facto taxonomy for any organisation that takes reliability engineering seriously.

Its core idea is simple but powerful: every failure should be recorded as a triplet — what was observed (the problem), why it happened (the cause), and what was done about it (the remedy). This shared taxonomy is what turns scattered free-text maintenance notes into a reliability database you can actually analyse.

Why does failure coding matter? Because without a consistent taxonomy you cannot see that 40% of your pump stoppages are caused by insufficient lubrication rather than bearing wear — and so you cannot fix the lubrication program instead of buying new bearings. Structured coding is the difference between a system that records the failure and one that helps you prevent it, and it is the foundation for computing KPIs like MTBF and MTTR.