PSI - Issue 22

Lyubomir Zdravkov et al. / Procedia Structural Integrity 22 (2019) 291–298 L. Zdravkov, M. Pantusheva / Structural Integrity Procedia 00 (2019) 000 – 000

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3.2. Fabrication and construction stage measures  Fabricated elements of the structure shall be checked for complete compliance with the design;  Construction and assembly shall be monitored and implemented by authorized personnel so that it fully complies with the legislative documents and technical requirements for the products and processes. 3.3. Measures during operation  Steel tanks should be inspected regularly, as prescribed by a relevant legislative document. Regular maintenance is highly recommended;  Along with the tank structure, all the attached accessories and supporting systems shall be evaluated for necessary repairs or replacements;  All observed faults or damage should be described in a log and repaired as soon as possible;  Grown vegetation should be removed promptly. 3.4. During repair works  When applying the corrosion-resistant coating, the technological requirements for maximum humidity, minimum temperature and the degree of cleaning of the surfaces have to be met;  All repairs should not deteriorate the condition of the tank;  All materials used and processes implemented must comply with the guidelines and requirements provided by the manufacturer and the relevant legislative documents. Acknowledgements The authors would like to express their gratitude to the Research, Consultancy and Design Centre (RCDC) of UACEG Sofia for the financial support provided. References API Standard 650. Welded Tanks for Oil Storage, Twelfth Edition. American Petroleum Institute, Washington, 2013. API Standard 653. Tank Inspection, Repair, Alteration, and Reconstruction, Fifth Edition. American Petroleum Institute, Washington, 2014. Chang, J., Lin, C. - C., 2006. A study of storage tank accidents, Journal of Loss Prevention in the Process Industries 19, 51–59. Е N 1993 - 4 - 2:2007. Eurocode 3 - Design of steel structures - Part 4 - 2: Tanks. European committee for standardization, Brussels, 2007. EN 14015:2004. Specification for the Design and manufacture of site built, vertical, cylindrical, flat - bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above. European committee for standardization, Brussels, 2004. Kostadinov, J., Zdravkov, L., 2002. Inspection and technical diagnosis of steel vertical cylindrical tanks. Mag. “ Строителство ”, Sofia, 1 Rusev, S., Zdravkov, L., 2004. The repairing works of vertical joints which are executed as lap joints. Conference of IASS, Varna. Zdravkov, L., 2003. Vertical cylindrical steel storage tanks for oil and oil products storage with double bottom. Mag. "Строителство", Sofia, 1 Zdravkov, L., 2003. Increase of the security of the steel tanks in exploitation. Mag. "Строителство", Sofia, 5 Zdravkov, L., 2005. Increase of the security of the vertical cylindrical steel storage tanks in exploitation, PhD Thesis. UACEG, Sofia Zdravkov, L., 2006. Technical inspection of Aboveground Steel Tanks. Science conference of VSU, Sofia ВП - ДА - ДР - ВВЗ - 00.0А.001 - 001 - 002, Вътрешни правила за експлоатация и ремонт на стоманени резервоари за съхранение на нефтопродукти в петролните бази на ДА “ ДРВВЗ ”. State Agency “State reserve and war - time stocks”, Sofia, 2015. НК 1 - 03 - 502 - 6.3, Наредба за експлоатация и ремонт на метални резервоари в „ ЛукОЙЛ Нефтохим Бургас “ АД. “LUKOIL Neftohim Burgas AD ”, Burgas, 2011. РД08 - 95 - 95, Положение о системе технического диагностирования сварных вертикальных цилиндрических резервуаров для нефти и нефтепродуктов. АО "ВНИИмонтажспецстрой" и АОЗТ "КОНТАКТ “, 1995. РД 153 - 112 - 017 - 97, Инструкция по диагностике и оценке остаточного ресурса вертикльных стальных резервуаров. АО „ Нефтемонтаждиагнсотика “, 1997. СТО 0030 - 2004, Резервуары вертикальные цилиндрические стальные для нефти и нефтепродуктов. Правила технического диагностицирования, ремонта и реконструкции. ЗАО „ ЦНИИПСК им. Мельнокова “, ОАО „ ПИ Нефтеспецстройпроект “, ОАО „ ВНИИМонтажспецстрой “, ЗАО „ Трест Коксохиммонтаж “, Москва, 2004. Тотева, E., Интервю с проф. Петър Стайков. БТА, 2014.