| Document | Source | Key Features | |----------|--------|--------------| | API 579-1 / ASME FFS-1 | API/ASME (paid, but older drafts free) | Level 1,2,3 FAD | | FITNET FFS (2008) | EU-funded project (free PDF online) | Based on BS 7910, very similar | | R6 (Revision 4) | EDF Energy (UK) – free for academic use | Classical FAD method | | BS 7910:2005 (Historical) | Archive.org (sometimes) | For study only |