The following are considered high-pressure-piping systems:
A business must first employ an individual who has a master HPP 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.
Persons who are not licensed as a master pipefitter or journeworker pipefitter may assist in the installation of high-pressure piping systems under the direct supervision of a licensed pipefitter, if they are registered in an approved pipefitter apprenticeship program, or registered with CCLD as an unlicensed high-pressure-piping pipefitter.
Licensed master or journeyworker pipefitters may directly supervise no more than two unlicensed persons.
An individual must have five years experience in the practical installation or fabrication of high-pressure-piping systems, apply for and be approved to take the master pipefitter exam, and receive a minimum score of 70 on the exam.
An individual must have four years of experience in the practical installation or fabrication of high-pressure-piping systems, apply for and be approved to take the journeyworker pipefitter exam, and receive a minimum score of 70 on the exam.
Both examinations are drawn from the Department of Labor and Industry's high-pressure piping and code for power-piping systems: Minnesota Statutes Chapter 326B - sections 326B.90 to 326B.925 and Minnesota Rules Chapter 5230. This information is also available for purchase from Minnesota's Bookstore, 660 Olive Street, St. Paul, MN 55155, (651) 297-3000.
Download the high-pressure-piping license examination guide. (PDF)
Other available study guides:
The a application and affidavit forms are available for download on this Web site or by contacting the Minnesota Department of Labor and Industry at (651) 284-5059
All costs of labor and material for the installation/fabrication of the high-pressure-piping project are to be included. This includes the cost of material supplied by the owner of the facility of the project. There is a worksheet with the permit application form to assist you in the calculation of these fees.