Eurocode 3 Design Of Steel Structures Part 4 2 Tanks ((link))

Thermal loads from hot stored product (e.g., asphalt at 150°C) cause axial expansion, leading to large bending at the shell-to-bottom joint. EN 1993-4-2 does not give explicit design for this – you must use EN 1993-1-5 (plated structures with thermal gradients).

The lower courses of the tank bear the weight of the liquid. The design involves checking the circumferential membrane stresses against the yield strength of the steel. Because the stress is primarily membrane tension (hoop stress), the formula is relatively straightforward, governed by the classic equation: $$ \sigma = \fracp \cdot rt Eurocode 3 Design Of Steel Structures Part 4 2 Tanks

Based on real industry failures:

The primary membrane stress in a tank shell is the hoop stress: [ \sigma_\theta = \fracp \cdot rt ] Where ( p = \rho \cdot g \cdot h ) (hydrostatic pressure at depth ( h )). For a given steel grade (e.g., S275), this gives the minimum theoretical thickness . But due to geometric imperfections, the code requires an additional knockdown factor for buckling. Thermal loads from hot stored product (e

EN 1993-4-2 defers to EN 1993-1-4 (stainless steels) and EN 1993-1-3 (cold-formed) but focuses primarily on carbon steels compliant with EN 10025 and EN 10217. But due to geometric imperfections, the code requires

EN 1993-4-2 is a structural code. It does not replace product standards like EN 14015 (for ambient temperature storage tanks) or API 650 . However, EN 1993-4-2 provides the material-neutral structural safety format (partial factors, limit states) that can be used with those product standards.

: Guidance on modeling shell structures, including cylindrical shells and transitions. Limit States