Thin Walled Pressure Vessel

[EngineerinNeed]

Hi Eng community,

This is my first post after countless threads being read. I'm currently a student working on a project analysing a pressure vessel and comparing stresses calculated using analytical models (e.g., Roark's Formulas for Stress and Strain), finite element analysis (FEA), and ASME Section VIII design codes. I need help identifying the specific formulas or code references in ASME Section VIII for the following regions of the pressure vessel:

1. Cylindrical Section: Hoop (circumferential), longitudinal, and radial stresses.
2. Hemispherical Ends:
3. Transition Region: Stresses arising from the junction between the cylindrical shell and hemispherical end.

Pressure Vessel Setup:

• Internal Design Pressure: 1.7 MPa
• Internal Operating Temperature: 60°C
• Internal Diameter: 1.6 m
• Material: SA-516 Gr 70
• Wall Thickness: 14.7 mm (11.7 mm + 3 mm corrosion allowance)

I want to ensure that my comparison between the analytical models, FEA, and code-based calculations is accurate and follows best practices. Could someone point me to the relevant sections in ASME Section VIII (Division 2, if applicable) or share insights into how these stresses are typically calculated using the codes?

Thank you in advance for your help!

 

[TGS4]

In ASME Section VIII, Division 2, you will find yourself starting in Part 4, Section 4.3. Note that the approaches used in the Code are for calculating a wall thickness, based on an allowable stress. They do not calculate stresses, per se. Make sure that you understand the failure theory for 4.3, and also appreciate that 4.3.3 through 4.3.9 use a different failure theory from 4.3.10.

If you are looking at applying FEA, make sure that you follow the rules in Part 5.