Boiler Safety Program (7 Del.C. ch. 74B; 7 DE Admin. Code 1353): a certificate of inspection is required before a boiler or pressure vessel is operated. Enforced by DNREC Division of Waste and Hazardous Substances, Boiler Safety Program. Checked on the primary source; the state record was last reviewed 2026-11-12.
High-pressure and miniature boilers: certificate and internal inspection annually, external within six months. Low-pressure steam and hot-water heating boilers, hot-water supply boilers and lined water heaters: certificate every two years. Pressure vessels: every four years. Certificate posted on or near the object. Exemptions listed in section 1.2.
Source: primary document
Statewide layer. County and city amendments sit on top; confirm the local office for the address.
In force; 7 DE Admin Code 1353 (sections 8.2, 9.1) read Oct 19, 2026
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.
Boiler Safety Program (7 Del.C. ch. 74B; 7 DE Admin. Code 1353): a certificate of inspection is required before a boiler or pressure vessel is operated. High-pressure and miniature boilers: certificate and internal inspection annually, external within six months. Low-pressure steam and hot-water heating boilers, hot-water supply boilers and lined water heaters: certificate every two years. Pressure vessels: every four years. Certificate posted on or near the object. Exemptions listed in section 1.2.
DNREC Division of Waste and Hazardous Substances, Boiler Safety Program.
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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