factors to be considered for vessels in cyclic service

[YuJie_PV]

hi, all,

my company had a training on vessels under cyclic service.
it's advised to consider the following factors in case of fatigue analysis to increase fatigue life：

1. Vessels to be PWHT（For CS）
2. All welds be full penetration
3. Integral construction
4. Avoid slip on flanges
5. Avoid leg support
6. Avoid peaking at Category A joints

i wonder if they are mandatory per ASME VIII-2? i look through the rules in Code, and can't find any basis.
what do you think of these factors?

Thanks in advance

 

[r6155]

Read again, slowly.