Mistake in P91.

Hi Richard and Dave,

I am working to high temperatur and i īm using A335 P91, thickness upper to 3". And when i have revised the allowable i have had a surprise. The allowable in P91 is function of thickness (according to ASME B31.1). So if the thicknessis upper to 3" and temperatura is upper 1050šF we have a allowable but if the thickness is lower to 3" and temperatura is upper 1050 the allowable is other.
But Caesar it is not make distintion between thickness and also catch the high value (itīs not conservative)

(or i am wrong?)