You cannot build a safe pressure vessel without knowing exactly what your steel is made of. ASME specifications heavily rely on material standards, often cross-referenced with ASTM (American Society for Testing and Materials).
Standards for welding rods, electrodes, and filler metals. asme specifications
Today, while the history is rooted in steam boilers, ASME specifications govern everything from nuclear power plants to the plumbing in your home. You cannot build a safe pressure vessel without
A common point of confusion: