# Ohio — US boiler and pressure vessel inspection requirements by state For Ohio, governing body is Ohio Department of Commerce's Division of Industrial Compliance; statute citation is Ohio Revised Code, Title 41, Chapter 4104; power boiler inspection interval is annual internal and external inspections while operating; low-pressure boiler inspection interval is triennial internal inspections and annual external inspections under operating conditions; accepted inspector types is commissioned inspectors from authorized insurance companies, recorded from its source on 2026-08-05. - **State:** Ohio _(verified: appears in the quote below)_ - **Governing body:** Ohio Department of Commerce's Division of Industrial Compliance - **Statute citation:** Ohio Revised Code, Title 41, Chapter 4104 _(verified: appears in the quote below)_ - **Power boiler inspection interval:** annual internal and external inspections while operating _(verified: appears in the quote below)_ - **Low-pressure boiler inspection interval:** triennial internal inspections and annual external inspections under operating conditions _(verified: appears in the quote below)_ - **Accepted inspector types:** commissioned inspectors from authorized insurance companies _(verified: appears in the quote below)_ - **Pressure vessel inspection interval:** Unfired pressure vessels are exempt from field inspection. _(per nationalboard.org, not stated by the source above)_ - **Exemptions:** Portable boilers or unfired pressure vessels located on farms and used solely for agricultural purposes. Steam or vapor boilers carrying a pressure of not more than 15 psig, located in private residences or in apartment houses of fewer than six family units. Hot-water boilers operated at temperatures not exceeding 250°F, located in private residences or in apartment houses of fewer than six family units. Unfired pressure vessels. _(per nationalboard.org, not stated by the source above)_ ## What the source says > Ohio Ohio’s inspection framework: Governing body: The Ohio Department of Commerce’s Division of Industrial Compliance oversees boiler inspections under Ohio Revised Code, Title 41, Chapter 4104. Authorized inspector types: Ohio accepts commissioned inspectors from authorized insurance companies. Inspection frequency: High-pressure boilers require annual internal and external inspections while operating. Low-pressure boilers require triennial internal inspections and annual external inspections under operating conditions. ## Sources disagree More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from. ### Governing body chardonlabs.com says governing body is **Ohio Department of Commerce's Division of Industrial Compliance**, as of 2026-08-05. > Ohio Ohio’s inspection framework: Governing body: The Ohio Department of Commerce’s Division of Industrial Compliance oversees boiler inspections under Ohio Revised Code, Title 41, Chapter 4104. Authorized inspector types: Ohio accepts commissioned inspectors from authorized insurance companies. Inspection frequency: High-pressure boilers require annual internal and external inspections while operating. Low-pressure boilers require triennial internal inspections and annual external inspections under operating conditions. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says governing body is **Ohio Department of Commerce, Division of Industrial Compliance – Boilers**, as of 2026-08-05. > Ohio Revised Code, Title 41. Labor and Industry, Chapter 4104. Division of Boiler Inspection, Chapter 4104. Boilers. RULES FOR CONSTRUCTION AND STAMPING Construction: Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ### Statute citation chardonlabs.com says statute citation is **Ohio Revised Code, Title 41, Chapter 4104**, as of 2026-08-05. > Ohio Ohio’s inspection framework: Governing body: The Ohio Department of Commerce’s Division of Industrial Compliance oversees boiler inspections under Ohio Revised Code, Title 41, Chapter 4104. Authorized inspector types: Ohio accepts commissioned inspectors from authorized insurance companies. Inspection frequency: High-pressure boilers require annual internal and external inspections while operating. Low-pressure boilers require triennial internal inspections and annual external inspections under operating conditions. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says statute citation is **Ohio Revised Code, Title 41. Labor and Industry, Chapter 4104. Division of Boiler Inspection, Chapter 4104. Boilers.**, as of 2026-08-05. > Ohio Revised Code, Title 41. Labor and Industry, Chapter 4104. Division of Boiler Inspection, Chapter 4104. Boilers. RULES FOR CONSTRUCTION AND STAMPING Construction: Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ### Power boiler inspection interval chardonlabs.com says power boiler inspection interval is **annual internal and external inspections while operating**, as of 2026-08-05. > Ohio Ohio’s inspection framework: Governing body: The Ohio Department of Commerce’s Division of Industrial Compliance oversees boiler inspections under Ohio Revised Code, Title 41, Chapter 4104. Authorized inspector types: Ohio accepts commissioned inspectors from authorized insurance companies. Inspection frequency: High-pressure boilers require annual internal and external inspections while operating. Low-pressure boilers require triennial internal inspections and annual external inspections under operating conditions. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says power boiler inspection interval is **Power boilers and high-pressure, high-temperature water boilers: Internal 1 Year, External 1 Year (under operating conditions).**, as of 2026-08-05. > Ohio Revised Code, Title 41. Labor and Industry, Chapter 4104. Division of Boiler Inspection, Chapter 4104. Boilers. RULES FOR CONSTRUCTION AND STAMPING Construction: Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ### Low-pressure boiler inspection interval chardonlabs.com says low-pressure boiler inspection interval is **triennial internal inspections and annual external inspections under operating conditions**, as of 2026-08-05. > Ohio Ohio’s inspection framework: Governing body: The Ohio Department of Commerce’s Division of Industrial Compliance oversees boiler inspections under Ohio Revised Code, Title 41, Chapter 4104. Authorized inspector types: Ohio accepts commissioned inspectors from authorized insurance companies. Inspection frequency: High-pressure boilers require annual internal and external inspections while operating. Low-pressure boilers require triennial internal inspections and annual external inspections under operating conditions. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says low-pressure boiler inspection interval is **Low-pressure boilers: Internal 3 Years, External 1 Year (under operating conditions).**, as of 2026-08-05. > Ohio Revised Code, Title 41. Labor and Industry, Chapter 4104. Division of Boiler Inspection, Chapter 4104. Boilers. RULES FOR CONSTRUCTION AND STAMPING Construction: Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ### Accepted inspector types chardonlabs.com says accepted inspector types is **commissioned inspectors from authorized insurance companies**, as of 2026-08-05. > Ohio Ohio’s inspection framework: Governing body: The Ohio Department of Commerce’s Division of Industrial Compliance oversees boiler inspections under Ohio Revised Code, Title 41, Chapter 4104. Authorized inspector types: Ohio accepts commissioned inspectors from authorized insurance companies. Inspection frequency: High-pressure boilers require annual internal and external inspections while operating. Low-pressure boilers require triennial internal inspections and annual external inspections under operating conditions. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says accepted inspector types is **Inspections made by inspectors of authorized insurance companies and commissioned by the department are accepted in lieu of inspections made by a department inspector.**, as of 2026-08-05. > Ohio Revised Code, Title 41. Labor and Industry, Chapter 4104. Division of Boiler Inspection, Chapter 4104. Boilers. RULES FOR CONSTRUCTION AND STAMPING Construction: Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ## Source - https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ - 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/).