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This storage tank design was originally developed in 1996 for a nuclear power plant project, using manual engineering calculations based on the API 650 references available at the time. The work covered tank geometry, shell plate thickness, wind girders, roof framing, support columns, seismic effects, annular plates and venting requirements.
The original calculation sheets have now been reconstructed into an interactive digital tool that preserves the calculation sequence while allowing input changes to automatically update dependent results. This redevelopment brings the original manual engineering work into a format that makes the calculations easier to review, compare and verify.
For Educational purposes only by Roderick Paulino
This project presents a vertical cylindrical steel storage tank design, reconstructed from your original 1996 API 650 calculation document and developed into an interactive engineering calculator.
The baseline tank has an inside diameter of 37.8 m, a shell height of 18.3 m, and a selected liquid level of 17.2 m, giving approximately 19,302 m³ of geometric storage volume and 1.1 m of freeboard. Its shell comprises seven plate courses, with recorded thicknesses ranging from 20 mm at the bottom to 8 mm at the top. The supported fixed roof uses rafters and girders carried by one central column, six inner-ring columns and twelve outer-ring columns.
The calculation workflow covers shell thickness, wind girders, roof members, support columns, historical seismic and annular-plate calculations, venting, and hydraulic duty. Changing an input automatically updates dependent results, allowing users to examine how dimensions, liquid properties, loading and selected components affect the design. Independent numerical checks, source references and design notes support review, while print and export functions preserve each calculation scenario.
The model remains a preliminary engineering study; current API 650 compliance, material acceptance and project-specific loads require verification before construction.
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