Over the last 20+ years, Predictive Engineering has tackled some of the most complex applications of the ASME BPVC Section VIII, Division 2 specifications.

Analysis
Objective
Over the last 20+ years, Predictive Engineering has tackled some of the most complex pressure vessel consulting applications of the ASME BPVC Section VIII, Division 2 "design-by-analysis" specifications. Our pressure vessel consulting work has ranged from the stress and fatigue analysis of large-diameter nuclear waste recycling vessels under NQA-1 requirementsVessels with internal piping and structures subjected to sloshing, seismic and added-mass effects to cryogenic thick-walled vessels to high-temperature reactors.
- Stress and fatigue analysis of large-diameter nuclear waste recycling vessels under NQA-1 requirements
- Vessels with internal piping and structures subjected to sloshing, seismic and added-mass effects
- Transient thermal-fatigue of thick-walled tanks
- Lifting and transportation analyses
- Buckling analysis via ASME formulas, Eulerian and Nonlinear methods
- Differential thermal-stress analysis of heat exchanges having mixed materials
Within this body of work, we have applied the following codes:
- ASME BPVC Section VIII, Division 2 stress and fatigue
- ASCE 4-98 with added-mass applications for normal modes analysis
- ASCE 7-02, AISI N690 and ABS
To support our pressure vessel work, we have written custom software for stress and fatigue evaluation of thin and thick-walled pressure vessels.
In summary: Our careful and meticulous ASME BPVC pressure vessel consulting work has allowed us to classify tanks and vessels as "fit-for-service" that would typically have required extensive rework by hand-calculations. Clients come to us when they need high-quality work executed and documented to withstand the most rigorous reviews whether DOE, GE Water and Gas or SpaceX.
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This sloshing video was made using the FSI capabilities in LS-DYNA. The fluid was modeling using SPH with the vessel mesh imported directly from Femap as a standard plate mesh. The wave action accelaration was applied to the model and reaction forces calculated at the base of the vessel. Forces from this Fluid Sturcture Interation analysis were verified against ASCE 7-02 sloshing calculations and were found to be within 10% of agreement.











