Leslie P. Antalffy

Comparison of Pressure Vessel Codes ASME Section VIII and EN13445

This paper consists of a comparative study of the primary technical, commercial, and usage differences between the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Section VIII and the European Pressure Vessel Code EN13445 (EN). This study includes a review of “Comparative Study on Pressure Equipment Standards” (hereby referenced by the “EC Study”) [see REF-1] and provides technical comparisons between the code design requirements, material properties, fabrication, and contributing effects on overall cost. This study is intended to provide a broad viewpoint on the major differences and factors to consider when choosing the most appropriate vessel design code to use.Copyright

Transient Thermal Finite Element Analysis Based on Field Measured Data and the Impact on Fatigue

Many vessels experience significant thermal loads in operation. This paper discusses a method used to develop the internal thermal boundary conditions (film coefficients) required to evaluate thermal loads when the thermal properties of the internal fluid are unknown. In a thermal analysis it is critical to determine the correct film coefficients to achieve the proper behavior. Improperly quantified heat up rates can have a dramatic effect on the overall design. An example is provided to show how assumptions on thermal input can directly effect the results. The method described in this paper uses Finite Element Analysis (FEA) to determine internal film coefficients based on field measured thermocouple data.© 2004 ASME