Effective pipe stress analysis is critical in order to ensure the following:
- Compliance with legislation.
- Piping is well supported and does not sag or deflect under its own weight.
- Deflections in the pipework are well controlled when thermal and other loads are applied.
- Stresses in the pipe wall in both the cold and hot conditions are below the allowable threshold.
CPA can provide a full and comprehensive Pipe Stress Analysis service on an ad-hoc basis if required. Our high quality analysis can be conducted to various applicable international standards (e.g. ASME B31.1, B31.3). Such analyses include:
- Thermal Analysis – Analysis for free and restrained thermal growth conditions.
- Deadweight Analysis – Analysis at ambient temperature with a system of hangers at specific locations to support the weight of the system, for allowable stress and reactions at equipment connections.
- Seismic Analysis – Either equivalent static or dynamic analysis.
- Wind Load Analysis – Equivalent static stress analysis.
- Transient Analysis – For various transient loading conditions such as: turbine trip, pipe whip, safety relief valve trip etc.
This is done using analysis software such as CAESAR II whereby the model is constructed from piping general arrangement, piping isometric drawings and piping and valve specifications.
Once the system is accurately modeled, taking care to set the boundary conditions, comprehensive stress analysis calculations are done and modifications to the model are made to ensure compliance with the relevant requirements. Such modifications may include one of more of the following tools: