Boiler Examination, Licensing/Registration & Application Information

Effective June 14, 2017 boiler examinations may include questions from the Skilled Trades Regulation Act, 2016 PA 407 as well as the respective code.

Additionally, examinations are conducted by PSI.  Approved applicants will be contacted by PSI to schedule their examination at one (1) of five (5) PSI testing centers throughout the state and are available to test six (6) days a week.  Applicants are able to choose their testing center and day of examination.  All examination fees are required to be paid to PSI at the time an examination is scheduled.  Therefore, as of June 14, 2017, examination fees should no longer be submitted to the State of Michigan/Bureau of Construction Codes.

Further information regarding scheduling or questions can be directed to PSI at https://candidate.psiexams.com/catalog/displayagencylicenses.jsp?catalogID=337.


Boiler Operator and Stationary Engineer Examinations

  • High- and low- pressure boiler operator examinations shall be written.
  • Stationary engineer exams shall be written.
  • The written examination for all classifications of boiler operator and stationary engineer shall be delivered and administered by NIUPLE, National Institute for Uniform Licensing of Power Engineers.
  • All examinations require an original application be submitted to the Bureau’s Licensing Division.

Application for Boiler Operator or Stationary Engineer Examination


Boiler Installer's License

  • Class 1B installer's license qualifies a person to install a low-pressure boiler that does not exceed a firing rate of 1,000,000 BTU per hour as certified by the boiler manufacturer.  For a class 1B license, the sum of all modules in a modular boiler shall not exceed a firing rate of 1,000,000 BTU per hour as certified by the boiler manufacturer.
  • Class 2B installer's license qualifies a person to do all of the following:
    • Install a low-pressure boiler of any capacity or firing rate.
    • To perform work covered by a class 1B license.
  • Class 3B installer's license qualifies a person to do all of the following:
    • Install a power boiler that has a capacity of not more than 5,000 pounds of steam per hour
    • Install or replace non-boiler external piping as defined by ASME code B31.1 and R 408.4032
    • Perform work covered by a class 2B license.
  • Class 4B installer's license qualifies a person to do all of the following:
    • Install a boiler that has a capacity of not more than 300,000 pounds of steam per hour.
    • Install or replace non-boiler external piping as defined by ASME code B31.1 and R 408.4032
    • Perform work covered by a class 3B license.
  • Class 5B installer's license qualifies a person to do all of the following:
    • Install a boiler of any capacity or firing rate. Exception: a nuclear heat source boiler.
    • Install or replace non-boiler external piping as defined by ASME code B31.1 and R 408.4032
    • Perform work covered by a class 4B license.
  • Class 6B installer's license qualifies a person to install a boiler that utilizes a nuclear heat source or its parts, appurtenances, or system components. Before a license is issued, an applicant for a class 6B license shall submit evidence of both of the following:
    • Familiarity with and knowledge of all federal rules and regulations regarding the installation of a boiler that has a nuclear heat source.
    • Employment by a company in possession of a valid ASME nuclear code symbol applicable to the portions of any nuclear boiler system that the company proposes to install.
  • Class P license qualifies a person to install or replace non-boiler external piping or repair non-boiler external piping as defined by ASME code B31.1 and R 408.4032.

Boiler Installer's Examination Instructions

Application for Boiler Installer's or Repairer's Examination


Boiler Repairer's License

  • A class I license allows a licensee to repair a boiler by means other than welding, riveting, or other fabrication process.
  • A class II license allows a licensee to do both of the following:
    • Repair a low-pressure boiler, a hot water supply boiler, and a fire tube boiler of any pressure
    • Perform work covered by a class I license.
  • A class III license allows a licensee to do all of the following:
    • Repair a high-pressure boiler.
    • Repair or replace non-boiler external piping, as defined by ASME code B31.1 and R 408.4032.
    • Perform work covered by a class II license.
  • A class IV license allows a licensee to do all of the following:
    • Repair or field-erect a boiler of any pressure. Exception: a boiler that has a nuclear heat source.
    • Repair or replace non-boiler external piping as defined by ASME code B31.1 and R 408.4032.
  • A class V license allows a licensee to erect and repair a boiler that has a nuclear heat source or its parts, appurtenances, or system components, and also provides the following:
    • The licensee may repair or replace non-boiler external piping, as defined by ASME code B31.1 and R 408.4032.
    • Before a license is issued, an applicant for a class V license shall submit evidence of the following:
    • Familiarity with and knowledge of all federal rules and regulations regarding the construction of a boiler that has a nuclear heat source.
    • Employment by a company in possession of a valid ASME N-type symbol stamp applicable to the portions of any nuclear boiler system he or she proposes to repair.
  • A class P license qualifies a person to install or repair non-boiler external piping as defined by ASME code B31.1 and R 408.4032.

Boiler Repairer's Examination Instructions

Application for Boiler Installer's or Repairer's Examination


National Board

Please contact the National Board of Boiler and Pressure Vessel Inspectors at http://www.nationalboard.org/default.aspx.

Questions regarding licensing requirements should be directed to the Bureau’s Licensing Division at 517-241-9316.