# New Jersey — US boiler and pressure vessel inspection requirements by state For New Jersey, governing body is Department of Labor and Workforce Development's Mechanical Inspection Bureau; statute citation is New Jersey State Statutes, Title 34, and Administrative Code 12:90; power boiler inspection interval is annual internal and external inspections; low-pressure boiler inspection interval is annual external inspections and biennial internal inspections; accepted inspector types is commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs, recorded from its source on 2026-08-05. - **State:** New Jersey _(verified: appears in the quote below)_ - **Governing body:** Department of Labor and Workforce Development's Mechanical Inspection Bureau - **Statute citation:** New Jersey State Statutes, Title 34, and Administrative Code 12:90 _(verified: appears in the quote below)_ - **Power boiler inspection interval:** annual internal and external inspections _(verified: appears in the quote below)_ - **Low-pressure boiler inspection interval:** annual external inspections and biennial internal inspections _(verified: appears in the quote below)_ - **Accepted inspector types:** commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs _(verified: appears in the quote below)_ - **Pressure vessel inspection interval:** Each pressure vessel shall receive a certificate inspection triennially (for those not under owner-user inspection agency). _(per nationalboard.org, not stated by the source above)_ - **Exemptions:** Steam or hot-water boilers having less than 10 square feet of heating surface. Steam or hot-water boilers having a heat input of less than 10 kW or 40,000 BTU per hour. Steam boilers operating at not exceeding 15 psi steam when serving dwellings of fewer than six family units or accommodation of less than 25 persons. _(per nationalboard.org, not stated by the source above)_ ## What the source says > New Jersey State Statutes, Title 34, and Administrative Code 12:90. Authorized inspector types: New Jersey accepts commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs. Inspection frequency: High-pressure boilers require annual internal and external inspections. Low-pressure boilers require annual external inspections and biennial internal 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 Mechanical Inspection Bureau**, as of 2026-08-05. > New Jersey State Statutes, Title 34, and Administrative Code 12:90. Authorized inspector types: New Jersey accepts commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs. Inspection frequency: High-pressure boilers require annual internal and external inspections. Low-pressure boilers require annual external inspections and biennial internal inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says governing body is **Mechanical Inspection Bureau of Boiler and Pressure Vessel Compliance, Department of Labor and Workforce Development, Division of Public Safety and Occupational Safety & Health**, as of 2026-08-05. > Boilers: An annual internal and external inspection for steam boilers; An annual external inspection and biennial internal inspection for hot-water boilers. Pressure Vessels - Each pressure vessel, except for “UM” stamped pressure vessels, shall be subject to either initial in-service inspection (for a newly manufactured pressure vessel) or initial field certificate inspection (for an existing pressure vessel). The initial field certificate inspection of existing pressure vessels shall take place by October 6, 2011. Each pressure vessel, with the exception of pressure vessels that are under the supervision of a registered owner-user inspection agency, shall receive a certificate inspection triennially. Pressure vessels and unfired boilers that are under the supervision of a registered owner-user inspection agency shall be inspected at intervals required by the National Board Inspection Code or API-510, as applicable. The inspection of any pressure vessel(s) contained within a refrigeration system shall be conducted pursuant to the regulation on refrigeration systems and is not part of the pressure vessel inspection requirements. Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ### Statute citation chardonlabs.com says statute citation is **New Jersey State Statutes, Title 34, and Administrative Code 12:90**, as of 2026-08-05. > New Jersey State Statutes, Title 34, and Administrative Code 12:90. Authorized inspector types: New Jersey accepts commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs. Inspection frequency: High-pressure boilers require annual internal and external inspections. Low-pressure boilers require annual external inspections and biennial internal inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says statute citation is **New Jersey State Statutes, Title 34. Labor and Workers Compensation, Boilers and Pressure Vessels, New Jersey Administrative Code, 12:90.**, as of 2026-08-05. > Boilers: An annual internal and external inspection for steam boilers; An annual external inspection and biennial internal inspection for hot-water boilers. Pressure Vessels - Each pressure vessel, except for “UM” stamped pressure vessels, shall be subject to either initial in-service inspection (for a newly manufactured pressure vessel) or initial field certificate inspection (for an existing pressure vessel). The initial field certificate inspection of existing pressure vessels shall take place by October 6, 2011. Each pressure vessel, with the exception of pressure vessels that are under the supervision of a registered owner-user inspection agency, shall receive a certificate inspection triennially. Pressure vessels and unfired boilers that are under the supervision of a registered owner-user inspection agency shall be inspected at intervals required by the National Board Inspection Code or API-510, as applicable. The inspection of any pressure vessel(s) contained within a refrigeration system shall be conducted pursuant to the regulation on refrigeration systems and is not part of the pressure vessel inspection requirements. 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**, as of 2026-08-05. > New Jersey State Statutes, Title 34, and Administrative Code 12:90. Authorized inspector types: New Jersey accepts commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs. Inspection frequency: High-pressure boilers require annual internal and external inspections. Low-pressure boilers require annual external inspections and biennial internal inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says power boiler inspection interval is **An annual internal and external inspection for steam boilers**, as of 2026-08-05. > Boilers: An annual internal and external inspection for steam boilers; An annual external inspection and biennial internal inspection for hot-water boilers. Pressure Vessels - Each pressure vessel, except for “UM” stamped pressure vessels, shall be subject to either initial in-service inspection (for a newly manufactured pressure vessel) or initial field certificate inspection (for an existing pressure vessel). The initial field certificate inspection of existing pressure vessels shall take place by October 6, 2011. Each pressure vessel, with the exception of pressure vessels that are under the supervision of a registered owner-user inspection agency, shall receive a certificate inspection triennially. Pressure vessels and unfired boilers that are under the supervision of a registered owner-user inspection agency shall be inspected at intervals required by the National Board Inspection Code or API-510, as applicable. The inspection of any pressure vessel(s) contained within a refrigeration system shall be conducted pursuant to the regulation on refrigeration systems and is not part of the pressure vessel inspection requirements. Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ### Low-pressure boiler inspection interval chardonlabs.com says low-pressure boiler inspection interval is **annual external inspections and biennial internal inspections**, as of 2026-08-05. > New Jersey State Statutes, Title 34, and Administrative Code 12:90. Authorized inspector types: New Jersey accepts commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs. Inspection frequency: High-pressure boilers require annual internal and external inspections. Low-pressure boilers require annual external inspections and biennial internal inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says low-pressure boiler inspection interval is **An annual external inspection and biennial internal inspection for hot-water boilers**, as of 2026-08-05. > Boilers: An annual internal and external inspection for steam boilers; An annual external inspection and biennial internal inspection for hot-water boilers. Pressure Vessels - Each pressure vessel, except for “UM” stamped pressure vessels, shall be subject to either initial in-service inspection (for a newly manufactured pressure vessel) or initial field certificate inspection (for an existing pressure vessel). The initial field certificate inspection of existing pressure vessels shall take place by October 6, 2011. Each pressure vessel, with the exception of pressure vessels that are under the supervision of a registered owner-user inspection agency, shall receive a certificate inspection triennially. Pressure vessels and unfired boilers that are under the supervision of a registered owner-user inspection agency shall be inspected at intervals required by the National Board Inspection Code or API-510, as applicable. The inspection of any pressure vessel(s) contained within a refrigeration system shall be conducted pursuant to the regulation on refrigeration systems and is not part of the pressure vessel inspection requirements. Source: https://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select ### Accepted inspector types chardonlabs.com says accepted inspector types is **commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs**, as of 2026-08-05. > New Jersey State Statutes, Title 34, and Administrative Code 12:90. Authorized inspector types: New Jersey accepts commissioned inspectors from authorized agencies who hold a Certificate of Competency. The state also recognizes API and National Board owner-user inspection programs. Inspection frequency: High-pressure boilers require annual internal and external inspections. Low-pressure boilers require annual external inspections and biennial internal inspections. Source: https://www.chardonlabs.com/resources/commercial-boiler-inspection-regulations-by-state/ nationalboard.org says accepted inspector types is **Inspections made by commissioned inspectors employed by an authorized inspection agency licensed to do business in the state and holding a Certificate of Competency from the department are accepted in lieu of inspections made by department inspectors.**, as of 2026-08-05. > Boilers: An annual internal and external inspection for steam boilers; An annual external inspection and biennial internal inspection for hot-water boilers. Pressure Vessels - Each pressure vessel, except for “UM” stamped pressure vessels, shall be subject to either initial in-service inspection (for a newly manufactured pressure vessel) or initial field certificate inspection (for an existing pressure vessel). The initial field certificate inspection of existing pressure vessels shall take place by October 6, 2011. Each pressure vessel, with the exception of pressure vessels that are under the supervision of a registered owner-user inspection agency, shall receive a certificate inspection triennially. Pressure vessels and unfired boilers that are under the supervision of a registered owner-user inspection agency shall be inspected at intervals required by the National Board Inspection Code or API-510, as applicable. The inspection of any pressure vessel(s) contained within a refrigeration system shall be conducted pursuant to the regulation on refrigeration systems and is not part of the pressure vessel inspection requirements. 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/).