Dear TGS4,
Thank you for your feedback.
The Design Allowable Stress Paragraph of ASME Sec VIII, Div-2 talks about the following for hydrostatic test pressure condition:
Pm ≤ 0.95Sy
Pm+Pb ≤ 1.43Sy (for Sy ≤ 0.67Sy)
Pm+Pb ≤ (2.43Sy - 1.5Pm) (for 0.67Sy < Sy <0.95Sy)
And I can derive Primary...