# Washington, D.C. — US boiler and pressure vessel inspection requirements by state

For Washington, D.C., state is Washington, D.C; governing body is Department of Buildings; statute citation is District of Columbia Code, Division 1. Government of District, Title 2. Government Administration, Chapter 1. Inspections – Boilers . DCMR Title 17 Chapter 4 (Steam Engineers). DCMR Title 12 Chapter 10E (Boilers, Water Heaters and Pressure Vessels); power boiler inspection interval is annual internal inspection; low-pressure boiler inspection interval is annual external inspection, recorded from its source on 2026-08-05.

- **State:** Washington, D.C.
- **Governing body:** Department of Buildings
- **Statute citation:** District of Columbia Code, Division 1. Government of District, Title 2. Government Administration, Chapter 1. Inspections – Boilers . DCMR Title 17 Chapter 4 (Steam Engineers). DCMR Title 12 Chapter 10E (Boilers, Water Heaters and Pressure Vessels).
- **Power boiler inspection interval:** annual internal inspection _(verified: appears in the quote below)_
- **Low-pressure boiler inspection interval:** annual external inspection _(verified: appears in the quote below)_
- **Pressure vessel inspection interval:** annual external inspection _(verified: appears in the quote below)_
- **Accepted inspector types:** Inspections made by inspectors employed by insurance companies and commissioned by the department are accepted in lieu of inspections made by a department inspector.
- **Exemptions:** Those under federal government jurisdiction; Those on boats or floating equipment; Those on railway locomotives; Those under the Public Utilities Commission jurisdiction; Unfired pressure vessels with a capacity of 15 gallons or less, and those constructed for a pressure of 60 psi or less

## What the source says

> Steam boilers: an annual internal inspection. Cast-iron boilers and unfired pressure vessels: an annual external inspection. Portable and other unfired pressure vessels: an annual external inspection.

## Source

- 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/).