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Evaluate and improve operational maintenance plans
Reduce direct and indirect costs (consequences) of ineffective maintenance
Provide evidence for “good ownership”
Tank Maintenance Plan Tank Maintenance Plan Maintenance history Inventure best practice Norms and guidelines Inspection techniques Input client Inspection history Repairs and modifications Condition assesment and failures Availability Cleaning procedures NDT On stream methods Clustering Methodologies API 581, EEMUA 159, API 653
Closing the loop Maintenance RBI-based Maintenance planning Repair procedures RBI-based maintenance plan RBI re-evaluation Plan Do Check Act
Tank fixed inspection intervals years Cleaning Inspection Maintenance Production loss costs
Tank flexible inspection intervals years Cleaning Inspection Maintenance Production loss costs
Api 581: Risk matrix tank X A D C E 1 2 3 1000 5 4 B 100 20 2 Likelihood (Damage Factor) Likelihood (category) Consequence (category) Consequence ($) $10K $100K $1M $10M Low Risk Medium-High Risk High Risk Medium Risk
EEMUA 159: Handling the results Client wants to close the tank for 15 years, however the inspection term from the EEMUA RBI study is 10 years. Solution: weld patch plates on all areas with a wallthickness lower than 4,9 mm.