Pipe wall thickness calculation method for t≥D/6 or for P/SE>0.385

[Sean_Wei]

Hello there,

ASME B31.3 eq. (3a) or eq. (3b) below is for t＜D/6, while for t ≥ D/6 or for P/SE > 0.385, the standard only said “require special consideration of factors such as theory of failure,effects of fatigue, and thermal stress”. How should I calculate it when in this situation？



Thanks

 

[1503-44]

 

[GD2]

A comparable analogy can be found in ASME Sec VIII Div 1 Mandatory Appendix 1 for Cylindrical Shell.