Indiana
For Indiana, governing body is Department of Homeland Security's Division of Fire and Building Safety; statute citation is Indiana Administrative Code, Title 680; power boiler inspection interval is annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible; low-pressure boiler inspection interval is biennial certificate inspections conducted externally and internally, where construction permits; accepted inspector types is State-employed inspectors conduct all first inspections. For ongoing inspections, commissioned insurance inspectors when vessels are insured and commissioned owner inspection agency inspectors, verified against its source on 2026-08-05.
- State
- Indiana verified
- Governing body
- Department of Homeland Security's Division of Fire and Building Safety verified
- Statute citation
- Indiana Administrative Code, Title 680 verified
- Power boiler inspection interval
- annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible verified
- Low-pressure boiler inspection interval
- biennial certificate inspections conducted externally and internally, where construction permits verified
- Accepted inspector types
- State-employed inspectors conduct all first inspections. For ongoing inspections, commissioned insurance inspectors when vessels are insured and commissioned owner inspection agency inspectors verified
- Pressure vessel inspection interval
- certificate inspection intervals not to exceed maximum periods per Indiana rules, National Board Inspection Code, or API-510 (not to exceed five years; where systematic corrosion data not available, maximum three years) per nationalboard.org
- Exemptions
- Domestic water heaters of size and heat input not exceeding that specified by the board; pressure vessels entirely full of water or less hazardous liquid at temperature not exceeding 180°F; boilers and unfired pressure vessels under federal regulation; unfired pressure vessels meeting US DOT requirements; air tanks on vehicles under other state authorities; air tanks on railroad rights-of-way; certain pressure vessels installed before/after July 1, 1971 based on volume and pressure limits; unfired pressure vessels protected by pressure-relieving devices at 15 psig or less; LP gas pressure vessels under Fire Prevention & Building Safety Commission; surgical sterilizers, coffee urns, steam-jacketed food cookers not exceeding board-specified size; commercial toy and miniature model boilers as hobby not exceeding board-specified size; anhydrous ammonia vessels (transportation/distribution storage as liquid fertilizer) under separate state regulations; nuclear vessels for nuclear waste collection/disposal not pressurized above atmospheric; standard and miniature traction engine boilers for exhibition; locomotive boilers on tourist attraction railways; farm agricultural boilers; certain residential boilers up to 215,000 BTU/hr output not in places of public assembly; domestic supply water-containing pressure vessels in owner-occupied or fewer than seven apartment residences; pressure vessels integral to electrical circuit breakers per nationalboard.org
What the source says
The Department of Homeland Security’s Division of Fire and Building Safety oversees boiler inspections under Indiana Administrative Code, Title 680. Authorized inspector types: State-employed inspectors conduct all first inspections. For ongoing inspections, Indiana requires commissioned insurance inspectors when vessels are insured and accepts commissioned owner inspection agency inspectors. Inspection frequency: High-pressure boilers require annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible. Low-pressure boilers require biennial certificate inspections conducted externally and internally, where construction permits.
— chardonlabs.com, retrieved 2026-08-05
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 — deciding between them is yours, not ours.
Governing body
chardonlabs.com says governing body is Department of Homeland Security's Division of Fire and Building Safety, as of 2026-08-05.
The Department of Homeland Security’s Division of Fire and Building Safety oversees boiler inspections under Indiana Administrative Code, Title 680. Authorized inspector types: State-employed inspectors conduct all first inspections. For ongoing inspections, Indiana requires commissioned insurance inspectors when vessels are insured and accepts commissioned owner inspection agency inspectors. Inspection frequency: High-pressure boilers require annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible. Low-pressure boilers require biennial certificate inspections conducted externally and internally, where construction permits.
https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/
nationalboard.org says governing body is Department of Homeland Security, Division of Fire and Building Safety, Boiler and Pressure Vessel Safety, as of 2026-08-05.
One annual internal and external certificate inspection; One annual external inspection while under pressure, if possible. With specific approval of the Boiler and Pressure Vessel Rules Board and the inspection agency, power boilers exceeding 300,000 pounds per hour steaming capacity may have inspection periods extended to a maximum of two years. Low-pressure heating boilers, hot-water heating and hot-water supply boilers: One biennial certificate inspection externally and, where construction permits, internally. Pressure vessels and steam-generating equipment which is an integral part of a continuous processing unit: Certificate inspection intervals shall not exceed the maximum periods between inspections determined in accordance with the provisions of Indiana rules, the National Board Inspection Code , or API-510 as applicable, except that:
https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select
Statute citation
chardonlabs.com says statute citation is Indiana Administrative Code, Title 680, as of 2026-08-05.
The Department of Homeland Security’s Division of Fire and Building Safety oversees boiler inspections under Indiana Administrative Code, Title 680. Authorized inspector types: State-employed inspectors conduct all first inspections. For ongoing inspections, Indiana requires commissioned insurance inspectors when vessels are insured and accepts commissioned owner inspection agency inspectors. Inspection frequency: High-pressure boilers require annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible. Low-pressure boilers require biennial certificate inspections conducted externally and internally, where construction permits.
https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/
nationalboard.org says statute citation is Indiana Administrative Code, Title 680. Boiler and Pressure Vessel Rules Board ., as of 2026-08-05.
One annual internal and external certificate inspection; One annual external inspection while under pressure, if possible. With specific approval of the Boiler and Pressure Vessel Rules Board and the inspection agency, power boilers exceeding 300,000 pounds per hour steaming capacity may have inspection periods extended to a maximum of two years. Low-pressure heating boilers, hot-water heating and hot-water supply boilers: One biennial certificate inspection externally and, where construction permits, internally. Pressure vessels and steam-generating equipment which is an integral part of a continuous processing unit: Certificate inspection intervals shall not exceed the maximum periods between inspections determined in accordance with the provisions of Indiana rules, the National Board Inspection Code , or API-510 as applicable, except that:
https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select
Power boiler inspection interval
chardonlabs.com says power boiler inspection interval is annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible, as of 2026-08-05.
The Department of Homeland Security’s Division of Fire and Building Safety oversees boiler inspections under Indiana Administrative Code, Title 680. Authorized inspector types: State-employed inspectors conduct all first inspections. For ongoing inspections, Indiana requires commissioned insurance inspectors when vessels are insured and accepts commissioned owner inspection agency inspectors. Inspection frequency: High-pressure boilers require annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible. Low-pressure boilers require biennial certificate inspections conducted externally and internally, where construction permits.
https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/
nationalboard.org says power boiler inspection interval is one annual internal and external certificate inspection; one annual external inspection while under pressure, if possible, as of 2026-08-05.
One annual internal and external certificate inspection; One annual external inspection while under pressure, if possible. With specific approval of the Boiler and Pressure Vessel Rules Board and the inspection agency, power boilers exceeding 300,000 pounds per hour steaming capacity may have inspection periods extended to a maximum of two years. Low-pressure heating boilers, hot-water heating and hot-water supply boilers: One biennial certificate inspection externally and, where construction permits, internally. Pressure vessels and steam-generating equipment which is an integral part of a continuous processing unit: Certificate inspection intervals shall not exceed the maximum periods between inspections determined in accordance with the provisions of Indiana rules, the National Board Inspection Code , or API-510 as applicable, except that:
https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select
Low-pressure boiler inspection interval
chardonlabs.com says low-pressure boiler inspection interval is biennial certificate inspections conducted externally and internally, where construction permits, as of 2026-08-05.
The Department of Homeland Security’s Division of Fire and Building Safety oversees boiler inspections under Indiana Administrative Code, Title 680. Authorized inspector types: State-employed inspectors conduct all first inspections. For ongoing inspections, Indiana requires commissioned insurance inspectors when vessels are insured and accepts commissioned owner inspection agency inspectors. Inspection frequency: High-pressure boilers require annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible. Low-pressure boilers require biennial certificate inspections conducted externally and internally, where construction permits.
https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/
nationalboard.org says low-pressure boiler inspection interval is one biennial certificate inspection externally and, where construction permits, internally, as of 2026-08-05.
One annual internal and external certificate inspection; One annual external inspection while under pressure, if possible. With specific approval of the Boiler and Pressure Vessel Rules Board and the inspection agency, power boilers exceeding 300,000 pounds per hour steaming capacity may have inspection periods extended to a maximum of two years. Low-pressure heating boilers, hot-water heating and hot-water supply boilers: One biennial certificate inspection externally and, where construction permits, internally. Pressure vessels and steam-generating equipment which is an integral part of a continuous processing unit: Certificate inspection intervals shall not exceed the maximum periods between inspections determined in accordance with the provisions of Indiana rules, the National Board Inspection Code , or API-510 as applicable, except that:
https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select
Accepted inspector types
chardonlabs.com says accepted inspector types is State-employed inspectors conduct all first inspections. For ongoing inspections, commissioned insurance inspectors when vessels are insured and commissioned owner inspection agency inspectors, as of 2026-08-05.
The Department of Homeland Security’s Division of Fire and Building Safety oversees boiler inspections under Indiana Administrative Code, Title 680. Authorized inspector types: State-employed inspectors conduct all first inspections. For ongoing inspections, Indiana requires commissioned insurance inspectors when vessels are insured and accepts commissioned owner inspection agency inspectors. Inspection frequency: High-pressure boilers require annual internal and external certificate inspections, plus an annual external inspection while under pressure if possible. Low-pressure boilers require biennial certificate inspections conducted externally and internally, where construction permits.
https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/
nationalboard.org says accepted inspector types is Insurance company inspectors commissioned by department (required in lieu of department inspector when vessel is insured); owner/user inspection agency inspectors commissioned by the department; state-employed inspectors make all first (installation approval) inspections, as of 2026-08-05.
One annual internal and external certificate inspection; One annual external inspection while under pressure, if possible. With specific approval of the Boiler and Pressure Vessel Rules Board and the inspection agency, power boilers exceeding 300,000 pounds per hour steaming capacity may have inspection periods extended to a maximum of two years. Low-pressure heating boilers, hot-water heating and hot-water supply boilers: One biennial certificate inspection externally and, where construction permits, internally. Pressure vessels and steam-generating equipment which is an integral part of a continuous processing unit: Certificate inspection intervals shall not exceed the maximum periods between inspections determined in accordance with the provisions of Indiana rules, the National Board Inspection Code , or API-510 as applicable, except that:
https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select
Sources
- chardonlabs.comhttps://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/
- nationalboard.orghttps://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select