Manufacture tolerance shall be not considered into design calculation for material saving.

[mechengineer]

However, it is checked as per the manufacture tolerance 12.5% (SA-530) of the thickness by PVElite for nozzle neck (pipe material). It means that the required thickness by PVElite is considered the manufacture tolerance for pipe material. This may be misleading some people to request the thickness required shall be included the manufacture tolerance for pressure pipe material. (Note: the required thickness is the thickness calculate by code).