# Montana — US boiler and pressure vessel inspection requirements by state

For Montana, governing body is Department of Labor and Industry, Building Codes Bureau, Boiler, Elevator, Weights and Measures; statute citation is Montana Code 2001, Title 50. Health and Safety, Chapter 60. Building Construction Standards and Chapter 74. Boiler and Steam Engines; power boiler inspection interval is Steam heating and power boilers: annual internal inspection. All manually-fired boilers and all boilers and banks of boilers rated with a total input of 400,000 BTU per hour or greater: annual inspection; low-pressure boiler inspection interval is All automatically fired boilers rated with an input of less than 400,000 BTU per hour: biennial inspection; accepted inspector types is Inspections made by inspectors employed by insurance companies may be accepted in lieu of inspections made by bureau inspectors as equivalent to those of the state inspectors. Each such special inspector shall hold a certificate as boiler inspector issued by the National Board of Boiler and Pressure Vessel Inspectors, recorded from its source on 2026-08-05.

- **State:** Montana
- **Governing body:** Department of Labor and Industry, Building Codes Bureau, Boiler, Elevator, Weights and Measures
- **Statute citation:** Montana Code 2001, Title 50. Health and Safety, Chapter 60. Building Construction Standards and Chapter 74. Boiler and Steam Engines.
- **Power boiler inspection interval:** Steam heating and power boilers: annual internal inspection. All manually-fired boilers and all boilers and banks of boilers rated with a total input of 400,000 BTU per hour or greater: annual inspection. _(verified: appears in the quote below)_
- **Low-pressure boiler inspection interval:** All automatically fired boilers rated with an input of less than 400,000 BTU per hour: biennial inspection. _(verified: appears in the quote below)_
- **Accepted inspector types:** Inspections made by inspectors employed by insurance companies may be accepted in lieu of inspections made by bureau inspectors as equivalent to those of the state inspectors. Each such special inspector shall hold a certificate as boiler inspector issued by the National Board of Boiler and Pressure Vessel Inspectors.
- **Exemptions:** Boilers under federal control. Steam-heating boilers operated at not over 15 psig in private residences or apartments of six or fewer families. Hot-water heating or supply boilers operated at not over 50 psig and temperatures not over 250°F when in private residences, or apartments of six or fewer families.

## What the source says

> All manually-fired boilers and all boilers and banks of boilers rated with a total input of 400,000 BTU per hour or greater: annual inspection. All automatically fired boilers rated with an input of less than 400,000 BTU per hour: biennial inspection. Steam heating and power boilers: annual internal inspection. This inspection may be performed during a scheduled maintenance shutdown with prior approval from the department. If located in a school, day-care center, hospital, rest home, retirement center, or place of assembly with a capacity of more than 100 persons: an annual inspection is required.

## Source

- https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US boiler and pressure vessel inspection requirements by state](https://referencesource.org/boiler-inspection-requirements-by-state/).