## 7 Conclusions  
Tanks play a critical role in various industries, including oil and gas facilities, chemical plants, and storage terminals. This research paper focuses on the analysis of blast-loaded cylindrical steel tanks, specifically addressing long-duration and high-pressure blast events. Traditionally, steel tanks have been designed to withstand medium explosion pressures. However, the need for higher safety standards and future requirements necessitates the exploration of higher peak overpressures as well as longer duration times; understanding the structural response to blast pressure is essential for ensuring structural integrity and safety. The study reviewed research approaches to blast load calculation and application with a focus on slow deflagration events since long-duration blast pressure typically results from slow deflagration rather than solid detonation events. The literature search revealed gaps in the analysis and design of cylindrical tanks under blast load. Therefore, a calculation concept was developed based on the results of the literature search. It enables a finite-element simulation for a triangular blast load, taking into account the time- and distance-dependent propagation of the pressure wave. Numerical analysis using the developed method is conducted on a representative ammonia steel tank geometry exposed to an explosion with a peak overpressure of 30 kPa and a 300 ms positive load duration. Furthermore, different calculation approaches have been investigated to first understand the structural response of cylindrical steel tanks subjected to long-duration and high-pressure blast loads and then qualify the individual calculation methods with respect to their usability. The main finding reveals that steel tanks can be effectively utilized under such blast loading. The research findings suggest that steel tanks can now be considered as a viable alternative to pre-stressed reinforced concrete tanks for high explosion loads. This research thus provides a numerically verified reference for the design and verification of steel tanks subjected to explosion loads with high overpressures and long durations. This presents several advantages. Firstly, the use of steel tanks can lead to cost savings during installation and maintenance. Secondly, in light of developments in climate-neutral steel production, steel tanks offer an environmental advantage over concrete structures with high CO\({}_{2}\) emissions. The adoption of steel tanks aligns with the goal of achieving climate neutrality and reducing the industry's carbon footprints in terms of the latest developments in climate-friendly steel production. In addition, the research addresses aspects controversially discussed in the literature and provides recommendations for improving the analysis and design of cylindrical steel tanks subjected to blast loads. Particularly, design criteria for blast-loaded steel tanks based on deformation limits could be derived. The recommendations have implications for the design and construction of tanks in critical infrastructure, improving safety standards, and ensuring adaptability to future utilization concepts. In conclusion, this contribution presents a comprehensive exploration of the challenges associated with determining the distance and time dependent blast pressure distribution on tank circumference and height. The study highlights the complexity of the problem, fills a knowledge gap in existing methods, and provides a basis for future research to further improve the blast load analysis of cylindrical tank structures. The publication results might help stakeholders to achieve a reliable selection of materials and design of tank structures exposed to the risks of high-pressure and long-duration blast loads. Conceptualization, J.R. and N.B. ; methodology, J.R.; software, J.R. and A.S.; validation, J.R., A.S., N.B., P.W. and T.W. ; formal analysis, J.R., A.S. and J.H. ; investigation, J.R., N.B., A.S. and J.H. ; resources, J.R.; data curation, P.W. and T.W.