I have a question, are you supposed to have a mechanical license to work on a boiler? I know the rules and regulations for a class a license, class B license, and I know the differences between mechanical license and class a license. Basically mechanical you can work with gas lines, steam, water lines, etc.
Next. And with class say you can do 25 tons and up .
What about ammonia systems? Are you supposed to have a mechanical license for ammonia?
I was just wondering about this.