National Board Inspection Code (NBIC) 2021 plus ASME Section I/IV and CSD-1; 481 IAC ch. 390 under Iowa Code ch. 89. Enforced by DIAL (Dept. of Inspections, Appeals & Licensing), Boiler and Pressure Vessel program, under Iowa Code ch. 89. Verified on the primary source, re-checked weekly.
DIAL administers; certificates run 1, 2, or 4 years depending on boiler type, with inspection due within 60 days before expiration. Utility boilers get internal inspection every 4 years, external annually. Rules updated Mar 26, 2025.
Source: primary document
Statewide layer. County and city amendments sit on top; the building view resolves them from your ZIP.
In force; no pending edition change found as of this research
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.
National Board Inspection Code (NBIC) 2021 plus ASME Section I/IV and CSD-1; 481 IAC ch. 390 under Iowa Code ch. 89. DIAL administers; certificates run 1, 2, or 4 years depending on boiler type, with inspection due within 60 days before expiration. Utility boilers get internal inspection every 4 years, external annually. Rules updated Mar 26, 2025.
DIAL (Dept. of Inspections, Appeals & Licensing), Boiler and Pressure Vessel program, under Iowa Code ch. 89.
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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