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Minnesota Legislature

Office of the Revisor of Statutes

    Subdivision 1. Definition. For the purpose of this chapter, the terms "show boiler" and
"hobby boiler" are synonymous and mean a boiler that is used only for display and demonstration
purposes. In recognition of the historical significance of show boilers in maintaining a working
reminder of Minnesota's agricultural, transportation, and lumber industries, show boilers and
engines are considered to be historical artifacts.
    Subd. 1a.[Repealed, 1994 c 402 s 2]
    Subd. 2. Inspection. When used for display and demonstration purposes, steam farm traction
engines, portable and stationary show engines and portable and stationary show boilers shall be
inspected every two years according to law.
(a) Show boilers or engines not certified in Minnesota shall be inspected thoroughly by a
boiler inspector certified to inspect boilers in Minnesota, using inspection standards in paragraph
(b), before being certified for use in Minnesota.
(b) Standards for inspection of show boilers shall be those established by the National Board
Inspection Code ANSI/NB23 and by the rules adopted by the Department of Labor and Industry,
Division of Boiler Inspection, and as follows:
(1) the boiler shall be subjected to the appropriate method of nondestructive examination, at
the owner's expense, as deemed necessary by the boiler inspector to determine soundness and
safety of the boiler;
(2) the boiler shall be tested by ultrasonic examination for metal thickness (for purposes
of calculating the maximum allowable working pressure the thinnest reading shall be used and
a safety factor of six shall be used in calculating maximum allowable working pressure on all
non-ASME-code hobby and show boilers); and
(3) repairs and alterations made to show boilers must be made pursuant to section 183.466.
(c) Further each such object shall successfully complete an inspection of:
(1) the fusible plug;
(2) the safety valve, which must be of American Society of Mechanical Engineers' approved
design and set at the maximum allowable working pressure and sealed in an appropriate manner
not allowing tampering with the valve setting without destroying the seal; and
(3) the boiler power piping.
Any longitudinal cracks found in riveted longitudinal seams requires that the vessel be
sealed and not approved for use in Minnesota. If the boiler or show engine is jacketed, the jacket
must be removed prior to inspection.
    Subd. 2a. Inspection fees. The fee for inspecting traction engines, show boilers, and show
engines shall be the hourly rate pursuant to section 183.545, subdivision 3a.
    Subd. 3. Licenses. A license to operate steam farm traction engines, portable and stationary
show engines and portable and stationary show boilers shall be issued to an applicant who:
(1) is 18 years of age or older;
(2) has a licensed second class or higher class engineer or steam traction (hobby) engineer
sign the affidavit attesting to the applicant's competence in operating said devices;
(3) passes a written test for competence in operating said devices;
(4) has at least 25 hours of actual operating experience on said devices; and
(5) pays the required fee.
A license shall be valid for the lifetime of the licensee. A onetime fee pursuant to section
183.545, subdivision 4, shall be charged for the license.
    Subd. 4. Exemption. Any licensed steam engineer may operate steam farm traction engines,
portable and stationary show engines and portable and stationary show boilers, subject to the
apparatus and horsepower restrictions set forth in the license, without obtaining a license under
subdivision 3.
    Subd. 5. Licensed operator; presence required. An operator licensed under this section
must be present when a traction engine, portable or stationary show engine, or portable or
stationary show boiler is in operation and a member of the public is present.
History: 1980 c 601 s 1; 1981 c 38 s 1; 1983 c 301 s 156; 1986 c 444; 1987 c 70 s 2,3; 1988
c 719 art 19 s 2-4; 1991 c 331 s 1; 1994 c 402 s 1; 1996 c 305 art 3 s 25,26; 1997 c 38 s 1-3;
1Sp2005 c 1 art 4 s 43,44