: EEMUA 159 generally suggests routine external inspections every 3 months , whereas API 653 recommends a monthly schedule.
: EEMUA 159 prioritizes optimization based on risk and actual operating conditions , sometimes allowing for more precise (less conservative) steel weight reductions compared to the more conservative API 650 or 653. How to Access EEMUA 159 Edition 4 Corrigendum
: Adjustments to how the guide refers to related standards like BS EN 14015 or API 653. : EEMUA 159 generally suggests routine external inspections
: Fixes to mathematical equations used for calculating minimum allowable wall thickness or remaining life. : Fixes to mathematical equations used for calculating
While most modern users have migrated to (released in 2017), the Edition 4 Corrigendum remains a critical reference for those maintaining compliance with the older standard. Purpose of the Corrigendum The corrigendum typically addresses:
The is a formal update issued to correct specific errors, such as typos or technical calculation oversights, in the 4th edition of the EEMUA Publication 159 (Users’ Guide to the Inspection, Maintenance and Repair of Above-ground Vertical Cylindrical Steel Storage Tanks).