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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.

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