Arizona Boiler Act (A.R.S. Title 23, Ch. 2, Art. 11) + A.A.C. R20-5 Article 4 (boilers, lined hot-water heaters, direct-fired jacketed steam kettles). Enforced by ICA/ADOSH Boiler Safety Section; since Jul 1, 2017 certificate inspections are performed only by authorized third-party or insurer inspection agencies (A.R.S. 23-485). Verified on the primary source, re-checked weekly.
Power and high-temperature water boilers: yearly internal plus external inspection; low-pressure heating boilers and jacketed kettles: every two years; hot-water boilers up to 160 psi/250F and large lined heaters: initial only. Certificate posted on site.
Source: primary document
Statewide layer. County and city amendments sit on top; the building view resolves them from your ZIP.
ICA 2026 regulatory agenda: may propose Article 4 updates for consistency with statute; no filing or date yet
There is no federal boiler certificate; the state program below is the whole obligation, with the ASME Boiler and Pressure Vessel Code and the National Board Inspection Code as the referenced standards.
Arizona Boiler Act (A.R.S. Title 23, Ch. 2, Art. 11) + A.A.C. R20-5 Article 4 (boilers, lined hot-water heaters, direct-fired jacketed steam kettles). Power and high-temperature water boilers: yearly internal plus external inspection; low-pressure heating boilers and jacketed kettles: every two years; hot-water boilers up to 160 psi/250F and large lined heaters: initial only. Certificate posted on site.
ICA/ADOSH Boiler Safety Section; since Jul 1, 2017 certificate inspections are performed only by authorized third-party or insurer inspection agencies (A.R.S. 23-485).
Rulemaking pending. ICA 2026 regulatory agenda: may propose Article 4 updates for consistency with statute; no filing or date yet
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