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Corrosion Under Insulation (CUI) in pipingc systems consumes a significant percent of the maintenance budget in the petrochemical industry. Prevention of CUI by the use of (1) thermal spray aluminum, (2) stainless steel pipe, (3) expanded metal cages for personnel protection instead of insulation and (4) aluminum foil wrapping are discussed in terms of long term protection, installed cost and Life cycle cost.
Corrosion Under Insulation (CUI) in piping systems consumes a significant percent of the maintenance budget in the petrochemical industry. A large portion of this money is spent on expense items such as external piping inspection, insulation removal and re-installation, painting and pipe replacements. CUI Prevention Strategies provide long term and reliable prevention of CUI that move towards "inspection-free; maintenance-free" piping systems and significant maintenance cost reductions. Prevention of CUI by the use of (1) thermal spray aluminum, (2) stainless steel pipe, (3) expanded metal cages for personnel protection instead of insulation and (4) aluminum foil wrapping are discussed in terms of long term protection potential, initial installed cost and Life cycle cost.
Keywords: corrosion under insulation, piping, thermal spray aluminum
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Corrosion under Insulation (CUI) and External Corrosion continue to be a major issue for Petrochemical facilities. Refineries have been investing in a CUI and External Corrosion inspection program. This paper details the methodology for addressing this damage and lessons learned throughout the implementation.