Order yourself the "Maintenance Managers Standard Manual" from Prentice Hall and so you can speak the lingo and understand what your boss is looking for. He may not know what he is looking for. Then start reading OEM manuals for the major pieces of machinery that you plant depends...
You must start with the ASME B31.1 power piping code for any utility service lines such as steam,, condensate, or water. All the requirements are in there. See the ASME website. You may also need to acquire a copy of your State boiler code if it has one. Your state may have adopted the NBIC...