The most common mistake in the industry is mixing code editions. ASME updates Section II every two years.
When most engineers think of the ASME Boiler & Pressure Vessel Code (BPVC), their minds jump immediately to Section VIII (Pressure Vessels) or Section I (Power Boilers). However, without Section II, those other sections would be useless sets of mathematical equations.
The most elegant FEA model or the most efficient boiler design is worthless if the material fails. ASME BPVC Section II is not just a list of metals; it is a risk management tool. It ensures that the steel you ordered will hold the pressure you calculated at the temperature you expect.