design by rule

design by rule is a process used in many industries to design industrial equipment. Nearly 100 years ago, ASME issued the Boiler and Pressure Vessel Code (BPV) design guidelines to enhance industrial safety. Today, ASME VIII is the most widely used pressure vessel design guideline. It has 3 sections, each with It is related to specific applications and methods.

In ASME VIII, there are two complementary assessment techniques:

  • Design by Rules
  • Design by Analysis (DBA)

design by rule

What is needed in the design with analysis from ASME VIII Div. 2 to be used?

For some reasons, design with rules may not be appropriate for structural design and evaluation:

  • Comprehensive fatigue calculations are essential.
  • Geometry is often unconventional.
  • The design has properties that cause stress concentration in the structure.
  • In addition to pressure, the structure is subject to other loads.

In general, with this technique, several cases can be considered in the design of pressure vessels:

  • Design requirements to avoid plastic breakdown
  • Design requirements to prevent local breakdownDesign by Analysis
  • Design requirements to avoid buckling
  • Numerical simulation requirements for the design of pressure vessels using the finite element method (FEM)
  • Material modeling requirements in the finite element method
  • Thermal analysis of pressure vessels
  • Creep-fatigue design requirements
  • Evaluation by failure method
  • Design of pressure vessels with instructions EN 13445 and PD 5500
  • Relationship between ASME VIII-2 and API 579-1 / ASME FFS-1 Level 3 in the structural life management process
  • Design optimization to reduce material use and production costs
  • Estimate the external loading capacity of the nozzle