# Tennessee — US boiler and pressure vessel inspection requirements by state For Tennessee, governing body is Department of Labor and Workforce Development's Boiler Inspection Unit; statute citation is Tennessee Code Annotated, Title 68, Chapter 122; power boiler inspection interval is annual internal and external inspections, with external inspections conducted while under pressure; low-pressure boiler inspection interval is biennial internal and external inspections; accepted inspector types is Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, commissioned insurance and owner company inspectors, verified against its source on 2026-08-05. - **State:** Tennessee _(verified: appears in the quote below)_ - **Governing body:** Department of Labor and Workforce Development's Boiler Inspection Unit _(verified: appears in the quote below)_ - **Statute citation:** Tennessee Code Annotated, Title 68, Chapter 122 _(verified: appears in the quote below)_ - **Power boiler inspection interval:** annual internal and external inspections, with external inspections conducted while under pressure _(verified: appears in the quote below)_ - **Low-pressure boiler inspection interval:** biennial internal and external inspections _(verified: appears in the quote below)_ - **Accepted inspector types:** Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, commissioned insurance and owner company inspectors _(verified: appears in the quote below)_ - **Pressure vessel inspection interval:** 2 Years internal; 2 Years external (subject to corrosion); certificate inspection every two years for others _(per nationalboard.org, not stated by the source above)_ - **Exemptions:** Boilers located on farms used solely for agricultural purposes; Boilers and pressure vessels located in municipalities where boiler inspection ordinances are in force; Steam boilers used for heating purposes carrying a pressure of not more than 15 psi, located in private residences or in apartment houses of fewer than six families; Hot-water heating boilers carrying a pressure of not more than 30 psi, located in private residences or in apartment houses of fewer than six families _(per nationalboard.org, not stated by the source above)_ ## What the source says > The Department of Labor and Workforce Development’s Boiler Inspection Unit oversees inspections under Tennessee Code Annotated, Title 68, Chapter 122. Authorized inspector types: Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, Tennessee accepts commissioned insurance and owner company inspectors. Inspection frequency: High-pressure boilers require annual internal and external inspections, with external inspections conducted while under pressure. Low-pressure boilers require biennial internal and external inspections. ## 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 **Department of Labor and Workforce Development's Boiler Inspection Unit**, as of 2026-08-05. > The Department of Labor and Workforce Development’s Boiler Inspection Unit oversees inspections under Tennessee Code Annotated, Title 68, Chapter 122. Authorized inspector types: Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, Tennessee accepts commissioned insurance and owner company inspectors. Inspection frequency: High-pressure boilers require annual internal and external inspections, with external inspections conducted while under pressure. Low-pressure boilers require biennial internal and external inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says governing body is **Department of Labor and Workforce Development, Boiler Inspection Unit**, as of 2026-08-05. > Tennessee Code Annotated, Title 68. Health, Safety and Environmental Protection, Chapter 122. Boiler Inspection, Erection and Repair . RULES FOR CONSTRUCTION AND STAMPING Construction: Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ### Statute citation chardonlabs.com says statute citation is **Tennessee Code Annotated, Title 68, Chapter 122**, as of 2026-08-05. > The Department of Labor and Workforce Development’s Boiler Inspection Unit oversees inspections under Tennessee Code Annotated, Title 68, Chapter 122. Authorized inspector types: Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, Tennessee accepts commissioned insurance and owner company inspectors. Inspection frequency: High-pressure boilers require annual internal and external inspections, with external inspections conducted while under pressure. Low-pressure boilers require biennial internal and external inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says statute citation is **Tennessee Code Annotated, Title 68. Health, Safety and Environmental Protection, Chapter 122. Boiler Inspection, Erection and Repair .**, as of 2026-08-05. > Tennessee Code Annotated, Title 68. Health, Safety and Environmental Protection, Chapter 122. Boiler Inspection, Erection and Repair . 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, with external inspections conducted while under pressure**, as of 2026-08-05. > The Department of Labor and Workforce Development’s Boiler Inspection Unit oversees inspections under Tennessee Code Annotated, Title 68, Chapter 122. Authorized inspector types: Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, Tennessee accepts commissioned insurance and owner company inspectors. Inspection frequency: High-pressure boilers require annual internal and external inspections, with external inspections conducted while under pressure. Low-pressure boilers require biennial internal and external inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says power boiler inspection interval is **1 Year internal; 1 Year external**, as of 2026-08-05. > Tennessee Code Annotated, Title 68. Health, Safety and Environmental Protection, Chapter 122. Boiler Inspection, Erection and Repair . 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 **biennial internal and external inspections**, as of 2026-08-05. > The Department of Labor and Workforce Development’s Boiler Inspection Unit oversees inspections under Tennessee Code Annotated, Title 68, Chapter 122. Authorized inspector types: Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, Tennessee accepts commissioned insurance and owner company inspectors. Inspection frequency: High-pressure boilers require annual internal and external inspections, with external inspections conducted while under pressure. Low-pressure boilers require biennial internal and external inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says low-pressure boiler inspection interval is **2 Years internal; 2 Years external**, as of 2026-08-05. > Tennessee Code Annotated, Title 68. Health, Safety and Environmental Protection, Chapter 122. Boiler Inspection, Erection and Repair . 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 **Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, commissioned insurance and owner company inspectors**, as of 2026-08-05. > The Department of Labor and Workforce Development’s Boiler Inspection Unit oversees inspections under Tennessee Code Annotated, Title 68, Chapter 122. Authorized inspector types: Department deputy inspectors conduct all initial inspections of new, reinstalled, and secondhand high-pressure and low-pressure boilers. For ongoing inspections, Tennessee accepts commissioned insurance and owner company inspectors. Inspection frequency: High-pressure boilers require annual internal and external inspections, with external inspections conducted while under pressure. Low-pressure boilers require biennial internal and external inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says accepted inspector types is **Inspections made by inspectors employed by insurance and owner/user companies and commissioned by the department are accepted in lieu of inspections made by department inspector.**, as of 2026-08-05. > Tennessee Code Annotated, Title 68. Health, Safety and Environmental Protection, Chapter 122. Boiler Inspection, Erection and Repair . 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/).