3. Context of piping calculations
3.1 Calculation assumptions
Wherever possible, for reasons of engineering cost, piping calculations are carried out using elastic analysis.
Pipe sections are modeled as "beam" elements (1D finite elements consisting of 2 nodes, i.e. 12 degrees of freedom per element).
In the case of steel piping (non-level 1 piping may also be made of composite materials or polyethylene), ductility, which characterizes plasticizing capacity, is taken into account indirectly via the choice of permissible stresses to be considered for regulatory checks.
Complex elastoplastic analyses are often coupled with 3D pipe modeling, and deployed in exceptionally sensitive cases.
This type of analysis eliminates the...
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Context of piping calculations
Thermal gradient calculations
Bibliography
Software tools
PIPESTRESS version 3.8.0
Mathcad 2001
Regulations
American Society of Mechanical Engineers ASME NB-3000 2013 Edition
Rules for the Design and Construction of Mechanical Equipment for PWR Nuclear Islets RCC-M B 3000 2012 Edition
Structural Eurocodes – Bases de calcul des structures NF EN 1990
Eurocode 1 – Actions on structures NF EN 1991-1-3 (snow) and NF EN 1991-1-4 (wind)
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