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Boilers and Pressure Vessels

The Delaware Boiler Safety Program oversees the construction, installation and repair of boilers and pressure vessels in, and destined for, the State of Delaware.

Effective Jan. 1, 2021, all payments shall be directed to the Boiler Safety Program electronically. Online payment may be made through either personal or business check (via E-Check) or by credit card.

Working closely with the Council on Boiler Safety, the program promotes public safety through inspections of boilers and pressure vessels, and provides education on the operation, maintenance and repair of boilers and pressure vessels.

Delaware has had a boiler safety program in place since 1919. Boiler Safety Program staff are dedicated to providing world class  customer service, whether it be in person, on the telephone, or through the web pages you are about to use.

Boiler Safety staff strives to create open and professional working relationships with boiler owners, contractors, inspectors, insurance companies, manufacturers, and citizens of Delaware to ensure the boilers and pressure vessels, located in places of public assembly, are manufactured, installed, operated, and repaired in a safe manner.

Boiler Safety Forms

Application for Examination — Required for all new inspectors requesting commissions in the State of Delaware. Applications for Examination must be notarized and accompanied by payment with a copy of the inspector’s National Board working card and commission certificate. Once this information is received by Boiler Safety the inspector is required to call 302-395-2500 to schedule a test date. Above information should be sent to: DNREC/Boiler Safety Program, 391 Lukens Drive, New Castle, DE 19720.

Boiler Installation Registration Form — Required for any new boiler installation in the State of Delaware. This form is completed by the installing contractor and submitted to Boiler Safety as soon as possible to schedule a boiler inspection with a National Board/Delaware Commissioned Inspector. Completed forms can be faxed to 302-395-2555.

Contractor’s Operational Report — It is the responsibility of the contractor to submit a Contractor’s Operational Report or a CSD-1 Operational Report prior to obtaining an operating certificate.

Report of Inspection — To be submitted to Boiler Safety by a National Board/Delaware Commissioned Inspector within 30 days of conducting an inspection.


“Boiler” and “pressure vessel” are both defined in Delaware state law (7 Del. Code § 7402B):

boiler is a closed vessel in which water is heated, steam is generated, steam is superheated, or any combination thereof, under pressure or vacuum for use externally, by the direct application of heat. The heat can be from the combustion of fuels, or from electricity or nuclear energy. The term “boiler” includes fired units for heating or vaporizing liquids other than water, where these units are separate from processing systems, and are complete within themselves. Boilers can be used for numerous applications such as heating a building, processing steam or making hot water, or for the supply and storage of hot or cold potable water. A water heater is considered a boiler.

pressure vessel is a container for the containment of pressure, either internal or external. The pressure may be obtained from an external source or by the application of heat from a direct or indirect source, or any combination thereof. Pressure vessels can be found almost everywhere including automobile dealers, repair garages, machine shops, schools and colleges and chemical plants and refineries. Several types of pressure vessels are: carbon dioxide storage cylinders; oxygen, nitrogen, anhydrous ammonia tanks and receivers; Freon receivers; and air receivers.

Stationary Engineers License

The Boiler Safety Program has no jurisdiction over stationary engineers within the State of Delaware. The City of Wilmington has a Board of Examining Engineers that oversees the licensing of stationary engineers.

For more information, please contact the City of Wilmington Board of Examining Engineers.

Related Links

National Board of Boiler and Pressure Vessel Inspectors

American Society of Mechanical Engineers

National Fire Protection Association