Allwable stresses for FEA for design code ASME section VIII - Div 1

[TheMehanic08]

We are in process of providing calculations for a pressure vessel details as below

Dia = 2500 mm
Design Pressure = 10 bar
Design Temp = 150 Deg C
CA = 3
MOC = SA 516 Gr. 60
Radiography = Spot
Joint Efficiency = 0.85
Design code = ASME section VIII Div 1

A nozzle had to be analyzed using FEA methods for the same. Hence I put forth the following queries.
• Kindly advice if the allowable stresses need to be considered as per ASME section VIII – Div 1 or Div 2 for the above case.
• Had this vessel been in cyclic service & and a fatigue analysis is needed. What would be the Design code in that case section VIII- Div 1 or 2.

 

[prex]

Normally you would stay with the design code for allowables and everything else that's specified in it, and go to Div.2 only for methods (fatigue, stress classification).

prex
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[TGS4]

As luck would have it, I wrote a blog post on this exact topic in September of 2013.

http://becht.com/blog/performing-an...ision-1-to-qualify-an-article-u-2-g-component

After you read it, please feel free to ask any question here.