Skip to main content

Campus login. | COVID-19 resources here. | DLI offices are closed to walk-in customers.

Note: Inspections of boilers and pressure vessels throughout Minnesota will continue. Prior to an inspection we will contact owners to schedule or reschedule the inspection. We will not attempt to perform an inspection in a facility where owner/management has immediate health concerns for residents or patients during the COVID-19 pandemic. For help with questions, contact your regional inspector


Information about boiler engineer and operator licenses for low- and high-pressure boilers and one historical license for steam traction engines. Installation permits are required for some boilers.

Aftermath of a boiler explosion.
Incidents and violations

There are nearly 80,000 boilers and pressure vessels throughout Minnesota. If improperly maintained or operated they can become extremely dangerous to individuals and structures. View images of unsafe boilers and pressure vessels.

A boiler inspector looks at a boiler.

Subscribe to the CCLD Review newsletter to stay up-to-date about changes to codes, licensing and more.