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

Seismic and Wind Load Analysis of ASME Section VIII Division 2 Design-by-Analysis Pressure Vessel Consulting Service

Analysis

ASME BPVC

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.

A large diameter spray-drying chamber was analyzed for seismic, wind and lifting - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
Thick-wall, high-pressure liquid oxygen (LOX) tanks experience thermal fatigue conditions not rarely seen in normal pressure vessels - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
A 100 foot-long tube and shell evaporator was analyzed for stress and deflection based on jointly developed transportation loads - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
The sloshing loads for this vessel were calculated per ASCE 4-98, Seismic Analysis of Safety-Related Structures - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
An ASME thermal fatigue analysis was performed on a high-temperature flue gas steam generator (i.e., boiler) - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
The above model represents a unique type of ASME pressure vessel that must withstand high pressures while simultaneously having a large surface area for heat transfer requirements - - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
Thermal and stress analysis calculations were performed per ASME VIII, Div. 2 to determine thermal and stress margins - - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
Shell and tube heat exchanger per ASME Section VIII, Div. 2 analyzed for design, operating, buckling and seismic loading - - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
Thermal-stress analysis was performed to classify system under ASME stress and fatigue requirements - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
A complex lifting analysis was performed to verify that an already built vessel system would not exceed ASME Section VIII, Div. 1 allowables - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
Shown above is a FEA model of an eight passenger, deep-diving (depth 1,200’) luxury submarine - Predictive Engineering ASME BPVC Pressure Vessel Consulting Services
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