High pressure piping contractors
High pressure piping contractors must first employ an individual who has a master pipefitter license. The business may then apply for a Minnesota high pressure piping contractor license. After the business has met these requirements, it may apply for a permit to install or fabricate high pressure piping. The business must also employ licensed journeyworker pipefitters to install or fabricate the high pressure piping.
What you need to know
![High pressure piping inspection](/sites/default/files/HPP-1.jpg)
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