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). Checked on the primary source; the state record was last reviewed 2026-11-12.
Power boilers: annual internal certificate inspection plus external about six months apart; high-temperature water boilers yearly; low-pressure heating boilers and jacketed kettles every two years; hot-water boilers to 160 psi/250F and large lined heaters: initial only. Certificate posted on site (R20-5-407). No state boiler-operator license.
Source: primary document
Statewide layer. County and city amendments sit on top; confirm the local office for the address.
In force; ICA Boiler Safety FAQ re-read Oct 26, 2026 (power boilers: annual internal plus external about six months apart; low-pressure heating boilers every two years; lined hot-water heaters initial inspection only; certificate posted per R20-5-407); no 2026 change listed
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.
These apply when the building has the equipment or fits the type named. The frequency is the standard one; your local official can set a stricter one, so confirm it for the address.
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 boilers: annual internal certificate inspection plus external about six months apart; high-temperature water boilers yearly; low-pressure heating boilers and jacketed kettles every two years; hot-water boilers to 160 psi/250F and large lined heaters: initial only. Certificate posted on site (R20-5-407). No state boiler-operator license.
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).
Nothing is scheduled. The rule above stays in force until the state adopts a newer edition or amends the program; AHJ Radar re-checks the source weekly.
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