Pressure Vessel Type C component / FFS Assessment

[Tural Jafarli]

Hello Guys,

Hope you're all doing well.

In API-579/FFS, Part 4, "Pressure vessel head to shell junction" is classified to be a Type C component.

I was wondering if this applies to 1) knuckle region of the (torispherical, ellipsoidal) pressure vessels or 2) it is just the head-to-shell weld?

Similar thing is mentioned for storage tanks, where shell to bottom junction (only the weld by itself?) is classified as Type C component.

Thanks,
Tural

 

[0707]

Go to ASME pressure vessel code section VIII, I suppose… Fitness For Service is another matter.