Ischmid75
The scope of ASME Code Section IV, Heating Boilers is:
Up to and including 15 psi (MAWP) steam and 160 psi (MAWP) and/or 250 degrees Fahrenheit for water. If the vessel exceeds any of these parameters then you must go to ASME Code, Section I, if the vessel meets the definition of a...
The design pressure 300 psi puts this vessel out of ASME Code, Section IV, heating boilers.
What you have is an ASME Code, Section I, electric boiler falling under PEB-3. You will need a "S" stamp holder to certify this vessel. You will have to have a Master Data Report P-2A for the electric...