[TN · STATE LICENSING · REPUBLISHER]
Licensing data: Data as of May 5, 2026

Trades Navigator summarizes state licensing rules from the state board. We do not characterize the rules, order classes against each other, or combine them into a single number. Each license class links to the issuing authority for primary-source verification.

Reported

Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels — Primary source · Maine

Page last refreshed: May 1, 2026

[03·GET LICENSED · ME]

Boilermaker licensing in Maine

State-issued license classes for boilermakers in Maine. Each class links to the issuing state board for primary-source verification.

License classes

MAINE · boilermaker

Boiler Operator

Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels
Exam
Maine OPOR (contracted)
Renewal
Every 3 yrs

Scope of Work

A Boiler Operator may operate, supervise, or have charge of a heating plant having a capacity of not more than 20,000 #/HR, or operate or supervise a plant up to the capacity of the license of the engineer in charge of the plant where the licensee is employed. Source: Maine OPOR — Stationary Steam Engineers (https://www.maine.gov/pfr/professionallicensing/professions/boiler-pressure-vessel-safety-program/licensing/stationary-steam-engineers) and 32 MRS §15109 (https://www.mainelegislature.org/legis/statutes/32/title32sec15109.html).

Experience and Training

Six months of operating experience under a Boiler Operator Training Permit is required prior to examination. Source: Maine OPOR Boiler Operator Training Permit page (https://www.maine.gov/pfr/professionallicensing/professions/boiler-pressure-vessel-safety-program/licensing/boiler-operator-training-permit).

Exam

Written examination administered through Maine OPOR's contracted exam provider.

Fees and Renewal

Editor must confirm current Boiler Operator-specific license fee and renewal cycle against the OPOR licensing page; the page lists $150 / 3-year for the engineer grades.

Verified May 1, 2026 · compiled from public sources, verify current rules with Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels before acting

MAINE · boilermaker

First Class Stationary Steam Engineer

Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels
Exam
Maine OPOR (contracted)
Renewal
Every 3 yrs

Scope of Work

A First Class Stationary Steam Engineer may operate, supervise, or have charge of a plant of unlimited steam capacity in Maine. Source: Maine Office of Professional and Occupational Regulation — Stationary Steam Engineers (https://www.maine.gov/pfr/professionallicensing/professions/boiler-pressure-vessel-safety-program/licensing/stationary-steam-engineers) and 32 MRS §15109 (https://www.mainelegislature.org/legis/statutes/32/title32sec15109.html).

Experience and Training

Two years of documented experience as a Maine Second Class Stationary Steam Engineer is required to qualify. Out-of-state applicants may submit equivalent licensure for Board review.

Exam

Written examination administered through Maine OPOR's contracted exam provider.

Fees and Renewal

Initial license fee $150 plus $21 background check. Term is 3 years. Renewal fee is $150. Late renewal up to 90 days carries a $50 additional fee; reinstatement after 90 days but within 2 years requires the $150 license fee plus a $100 penalty. Source: Maine OPOR Stationary Steam Engineers page (https://www.maine.gov/pfr/professionallicensing/professions/boiler-pressure-vessel-safety-program/licensing/stationary-steam-engineers).

Verified May 1, 2026 · compiled from public sources, verify current rules with Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels before acting

MAINE · boilermaker

Fourth Class Stationary Steam Engineer

Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels
Exam
Maine OPOR (contracted)
Renewal
Every 3 yrs

Scope of Work

A Fourth Class Engineer may have charge of a plant of not more than 50,000 #/HR, or operate or supervise a plant up to the capacity of the license of the engineer in charge of the plant where the licensee is employed. Source: Maine OPOR — Stationary Steam Engineers (https://www.maine.gov/pfr/professionallicensing/professions/boiler-pressure-vessel-safety-program/licensing/stationary-steam-engineers) and 32 MRS §15109 (https://www.mainelegislature.org/legis/statutes/32/title32sec15109.html).

Experience and Training

One year of documented experience as a Maine High Pressure Boiler Operator is required to qualify.

Exam

Written examination administered through Maine OPOR's contracted exam provider.

Fees and Renewal

Initial license fee $150 plus $21 background check. Term is 3 years. Renewal fee is $150.

Verified May 1, 2026 · compiled from public sources, verify current rules with Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels before acting

MAINE · boilermaker

Second Class Stationary Steam Engineer

Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels
Exam
Maine OPOR (contracted)
Renewal
Every 3 yrs

Scope of Work

A Second Class Stationary Steam Engineer may have charge of a plant of not more than 200,000 #/HR, or operate or supervise a plant up to the capacity of the license of the engineer in charge of the plant where the licensee is employed. Source: Maine OPOR — Stationary Steam Engineers (https://www.maine.gov/pfr/professionallicensing/professions/boiler-pressure-vessel-safety-program/licensing/stationary-steam-engineers) and 32 MRS §15109 (https://www.mainelegislature.org/legis/statutes/32/title32sec15109.html).

Experience and Training

Two years of documented experience as a Maine Third Class Stationary Steam Engineer is required to qualify.

Exam

Written examination administered through Maine OPOR's contracted exam provider.

Fees and Renewal

Initial license fee $150 plus $21 background check. Term is 3 years. Renewal fee is $150.

Verified May 1, 2026 · compiled from public sources, verify current rules with Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels before acting

MAINE · boilermaker

Third Class Stationary Steam Engineer

Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels
Exam
Maine OPOR (contracted)
Renewal
Every 3 yrs

Scope of Work

A Third Class Stationary Steam Engineer may have charge of a plant of not more than 100,000 #/HR, or operate or supervise a plant up to the capacity of the license of the engineer in charge of the plant where the licensee is employed. Source: Maine OPOR — Stationary Steam Engineers (https://www.maine.gov/pfr/professionallicensing/professions/boiler-pressure-vessel-safety-program/licensing/stationary-steam-engineers) and 32 MRS §15109 (https://www.mainelegislature.org/legis/statutes/32/title32sec15109.html).

Experience and Training

One year of documented experience as a Maine Fourth Class Engineer is required to qualify.

Exam

Written examination administered through Maine OPOR's contracted exam provider.

Fees and Renewal

Initial license fee $150 plus $21 background check. Term is 3 years. Renewal fee is $150.

Verified May 1, 2026 · compiled from public sources, verify current rules with Maine Office of Professional and Occupational Regulation — Board of Boilers and Pressure Vessels before acting

Free educational resource. Not legal, financial, or career advice. Trades Navigator compiles state board rules, statutes, and federal data into a navigable layer linked to primary sources. We do not maintain editorial attestation on each line. Always verify the specific number, fee, deadline, or rule against the linked primary source before relying on it. Confirm any decision with the relevant state agency, a lawyer, or an accountant.

Correction reports open at launch (target May 2026).