Dear Moderator,

On PD5500 design using ASME pipe SA-333 Gr 6 as nozzle neck, PVElite added corrosion allowance on values given on Table 3.5-4.

The usual ASME pipe mill undertolerance 12.5% seems excluded.

Is this violating PD5500 3.5.4.7 (b) (1),
the value given in Table 3.5-4 increased by the amount of any required corrosion and any manufacturing tolerances;

Regards!

Tan