Plenara

• PhysicsWhy a box header is not a cylinderA flat plate resists pressure by bending, not by membrane stress alone. How the engine splits a rectangular header into a membrane force and a plate-and-beam bending moment, and what that does to the numbers.Readarrow_forward
• MethodAppendix 13 sketches and the stress at each locationWhich Fig 13-2(a) sketches the engine implements, the membrane and bending equations coded for each, the allowable limits, and the short-box correction.Readarrow_forward
• MethodTube-hole rows: ligament efficiency (13-6)How a row of multidiameter tube holes weakens a tubesheet or plugsheet in membrane and in bending, the 13-6 equations as coded, and how 13-4(g) turns them into net stresses.Readarrow_forward
• EngineEnd plates, stays and partitions, MAWP and the test conditionUG-34 for the welded end plates, the stayed sketches for partitions that act as stays, how MAWP and the required thickness are found, and what the hydrotest check does.Readarrow_forward
• LimitsThe FE cross-check and what is verified against whatHow the shell-model cross-check of the box page is built, which published and independent cases the engine and the FE model are checked against, and what is not covered. FE results are early access.Readarrow_forward

Each note lists the source files it was read from. The finite-element modules are in early access and under independent verification before design use.