Michigan Administrative Code
Department - Licensing and Regulatory Affairs
Bureau of Construction Codes
Skilled Trades Regulation Rules
Part 9 - BOILER
Subpart A - BOILER LICENSES
Section R. 339.5174 - Classes of boiler installer's licenses

Universal Citation: MI Admin Code R. 339.5174

Current through Vol. 24-16, September 15, 2024

Rule 174.

(1) A class 1B installers license qualifies an individual to install a low-pressure boiler that does not exceed a firing rate of 1,000,000 British thermal units (BTU) per hour as certified by the boiler manufacturer. For a class 1B license, the sum of all modules in a modular boiler must not exceed a firing rate of 1,000,000 BTU per hour as certified by the boiler manufacturer.

(2) A class 2B installers license qualifies an individual to do both of the following:

(a) Install a low-pressure boiler of any capacity or firing rate.

(b) Perform work covered by a class 1B license.

(3) A class 3B installers license qualifies an individual to do all the following:

(a) Install a power boiler that has a capacity of not more than 5,000 pounds of steam per hour.

(b) Install or replace non-boiler external piping as defined by the American Society of Mechanical Engineers (ASME), as defined in Subpart B Part 1, code B31.1, 2018, and R 339.5209.

(c) Perform work covered by a class 2B license.

(4) A class 4B installers license qualifies an individual to do all the following:

(a) Install a power boiler that has a capacity of not more than 300,000 pounds of steam per hour.

(b) Install or replace non-boiler external piping as defined by ASME code B31.1 and R 339.5209.

(c) Perform work covered by a class 3B license.

(5) A class 5B installers license qualifies an individual to do all of the following:

(a) Install a power boiler of any capacity or firing rate, except for a nuclear heat source boiler.

(b) Install or replace non-boiler external piping as defined by ASME code B31.1 and R 339.5209.

(c) Perform work covered by a class 4B license.

(6) A class 6B installers license qualifies an individual to install a boiler that utilizes a nuclear heat source or its parts, appurtenances, or system components. Before a license is issued, an individual who is applying for a class 6B license shall submit evidence of both of the following:

(a) Familiarity with and knowledge of all federal rules and regulations regarding the installation of a boiler that has a nuclear heat source.

(b) 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.

(7) A class P license qualifies an individual to install or replace non-boiler external piping or repair non-boiler external piping as defined by ASME code B31.1 and R 339.5209.

Disclaimer: These regulations may not be the most recent version. Michigan may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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