On ASME UG-37, openings in pressure vessel

[jorgefherrero]

For openings on a torispherical head of a Pressure Vessel as UG-37, how should I calculate the reinforcement? Which value applies for "D": the inside shell diameter or the inside spherical diameter of the head?

Regards

 

[SnTMan]

jorgefherrero, you would use the inside skirt diameter, corroded as applicable, for D, but see UG-37(b), definition of "tr" (a) and 1-4(d).

Regards,

Mike

 

[vesselfab]

if the outside limits of reinforcement lies entirely within the spherical portion of the head, you can use the spherical radius with any allowance for corrosion added.