A Full Overview of ASME B31.3 - Fundamentals & Application

The key topics that this online pre-recorded course will cover are:

• A brief overview of theoretical background-Primary, secondary and peak stresses.

• Theoretical background-Membrane and Bending stresses

• Technical basis behind equation 1d Chapter II

• Peak stress- Further detail

• Stress Linearization from ASME SEC VIII D2 Part 5

• Basis behind 138 Mpa limitation

• Design pressure and temperature

• Allowable pressure –temperature variation

• Basis for allowable stress

• Terms related to Creep testing

• Larson –Miller parameter –Term appearing in Appendix V- Allowable variations in elevated temperature service

• A numerical example using Larson-Miller parameter.

• Limitations of B31.3

• Lame equation- Boardman approximation

• B31.3 – straight pipe and elbow wall thickness

• Weld joint strength reduction factor

• Weld joint quality factor (longitudinal welds)

• Mechanics of pipe bends .

• Stress intensification factor for pipe bends

• The basis behind 2yp limit to avoid ratchetting

• Factor of safety on Markl approach

• Underestimation of displacement-controlled stresses in B31.3

• Research work by PRG

• Issues with Markl SIFs

• Non-cyclic , cyclic and severely cyclic limits

• B31 Related Safety Factor vs. Cycles

• Recommended corrections to existing equations by Hinnant and Paulin

• Background to 1.23 factor

• Bree diagram & Uncertainties in expansion stress evaluation criteria in piping codes-N.Jacimovic

• Category D and Category M fluid service

• Elevated temperature service and High purity service

• Some cautions and limitations imposed in B31.3

• Area Replacement at openings

• Cautions on ASME B31.3 Chapter II on area replacement rule.

• Basis for Sustained stress indices

• Concepts of elastic-perfectly plastic model (limit state) and Twice –Elastic slope method

• B31.3 sustained stress indices

• Analysis of Seismic loads –Calculation of seismic inertial loading

• The concept of ductility reduction factor

• Current requirements in B31.3-Key highlights of upcoming B31E

• Analysis for blast loading

• Drag and Overpressure

• Governing differential equation for blast loading

• Allowable limits for stresses due to blast loading

• Reasons for development of B31J

• Key points from Appendix W of ASME B31.3

• An overview of ASME SEC VIII D2 Part 5 Fatigue analysis

• Welded joint curve approach

• Probability distribution function & Weibull distribution

• Probabilistic approach for wave loading

• Final stage of derivation of a cumulative damage result from Appendix W for wave loading.

• How do pipe stress analysis programmes operate?

• An example of stiffness matrix for beam element with only lateral degrees of freedom

• The issue with non-linearity and convergence problems.

• Listed vs unlisted materials

• Upper and lower temperature limits

• Impact testing and B31.3

• Roadmap for impact testing requirements in B31.3

• Charpy Impact test-fundamentals

• Requirements for low temperature toughness-B31.3

• Impact test exemption curve

• Background to the impact test exemption curve

• The concept and application of stress ratio-31.3 2024

• Fluid service limitations- B31.3 Chapter III

• How to use the allowable stresses in Appendix A of the code

• What informations CANNOT be found in B31.3?

• Nelson Curve- Hydrogen partial pressure as function of Temperature

• Initial service leak test

• Can hydrostatic test and pneumatic test be avoided for fluids other than category D?

• Sensitive leak test and special provisions for testing

• Is retesting required after repairs or additions? –Preparation for leak test

• Testing of pipe with vessels, externally pressurised piping and jacketed piping

• Safe distance calculation in pneumatic testing

• Stored energy calculation in pneumatic testing-ASME

• Safe distance calculation -Hydrotest

• Few words of caution on Hydroesting

• B31.3- weld preparations

• Why preheating and post weld heat treatment is required?

• Preheat requirements as per B31.3 2024

• Post-weld heat treatment requirements as per B31.3 2024

• Why for P8 material PWHT is not mandated?

• Why preheat depends on thickness?