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District of Columbia, DC Operating Engineers License

DC Consumer Regulatory Affairs
Building Inspections Division
941 North Capital Street, N.E
Washington, DC 20002

Local residency may not be required to apply for a license.

Licenses from other jurisdictions may be recognized for experience, check with jurisdiction.

The District of Columbia has 7 licensing levels:

Class 1 – Steam Engineer; (a) The experience and knowledge to take charge of and operate any plant; and
Have two (2) years of experience in addition to the experience required for the Class 3 license (§404.4), one of which shall be as an engineer in a 2nd class plant, or as a Class 2 Steam Engineer and assistant engineer in a 1st Class plant while holding a 2nd Class License.

Class 2 – Steam Engineer; (a) The experience and knowledge to take charge of and operate a high pressure steam plant where total horsepower of the boilers and engines or refrigeration machinery is not in excess of seven hundred fifty (750) horsepower; and
(b) In addition to the experience required for examination for the Class 3 Steam Engineer license, one (1) year of experience as an assistant engineer in charge of a 3rd Class plant.

Class 3 – Steam and Hot Water Heating Boiler Engineer; (a) The experience and knowledge to take charge of and operate any of the following:
(1) A plant having high pressure steam boilers not to exceed four hundred (400) horsepower or a combination of high pressure boilers and heating boilers or refrigeration equipment, not to exceed a total of four hundred (400) horsepower;
(2) A heating plant having low pressure steam boilers with a pump return and refrigeration equipment, with no limitation on total capacity; or
(3) A heating plant having hot water boilers and refrigeration equipment, with no limitation on total capacity.
(b) At least two (2) years of experience in a high pressure steam plant of more than seventy-five (75) boiler horsepower as an assistant engineer, fireman, or oiler; or four (4) years of experience in a plant of not less than fifty horsepower (50) [Seven thousand square feet (7,000 ft. 2) of steam radiation or eleven thousand two hundred square feet (11,200 sqft) of water radiation at one hundred fifty degrees Fahrenheit (150°F.)]. One year of experience will be waived for a graduate mechanical engineer from a duly recognized school of technology or a graduate of an approved engineer apprentice training program. District of Columbia Municipal Regulations Title 17 3

Class 4 – Steam Engineer; The experience and knowledge to take charge of and operate high pressure stationary steam boilers not in excess of seventy-five (75) horsepower and steam pressure not in excess of one hundred twenty-five pounds per
square inch 125 psi

Class 5a – Steam Engineer; (a) The experience and knowledge to take charge of and operate high pressure stationary steam boilers not in excess of twenty-five (25) horsepower and steam pressure not in excess of one hundred twenty-five pounds per square inch (125 psi); and
(b) At least six (6) months of experience in the care and operation of steam boilers.

Class 5b – Miniature Boiler Engineer; (a) The experience and knowledge to take charge of and operate a boiler which does not exceed the following limits: sixteen inch (16”) diameter of shell, forty-two inches (42”) of shell, twenty square feet (20 sqft) of heating surface, and one hundred pounds per square inch (100 psi) allowable working pressure;
(b) At least six (6) months of experience in the care and operation of team boilers.

Class 6 – Steam and Hot Water Heating Boiler Engineer; (a) The experience and knowledge to take charge of and operate steam and hot water heating boilers, where the steam pressure does not exceed fifteen pounds per square inch (15 psi) and the steam or hot water heating boilers do not exceed two hundred (200) horsepower (twenty eight thousand square feet (28,000 sqft) of steam radiation or forty-four thousand eight hundred square feet (44,800 sqft) of water radiation at one hundred fifty degrees (150°F.); and
(b) at least one (1) year of experience as a fireman or operator of a boiler other than a miniature boiler.

Class 7 – Portable and Construction Equipment Operator; (a) The experience and knowledge to take charge of and operate portable and construction equipment and machinery where the prime mover is in excess of twenty-five (25) horsepower, or as otherwise designated in the following classifications:
(1) Air compressors having a pressure capacity in excess of one hundred ten cubic feet per minute (110 cfm) at one hundred pounds per square inch (100 psi), hoists, and similar related equipment: at least six (6) months of experience in the care and operation of the class of equipment for which the license is to be applied;
(2) Bulldozers, scrapers, rollers, graders, front-end loaders, trenching machines, and similar and related equipment: at least one (1) year of experience in the care and operation of the class of equipment for which the license is to be applied;
(3) Cranes, shovels, derricks, draglines, clam shells, pile drivers, and similar and related equipment: at least two (2) years of experience in the care and operation of the class of equipment for the license is to be applied.

Class 8a – Operating Engineer - Refrigeration; (a) The experience and knowledge to take charge of and operate refrigeration systems where the total connected load is not in excess of two hundred (200) compressor horsepower, or two hundred (200) tons for an absorption system, and where there is no other equipment requiring a licensed steam or other operating engineer; and
(b) At least one (1) year of experience in the care and operation of refrigeration equipment.

Class 8b – Operating Engineer - Stationary Internal Combustion. (a) The experience and knowledge to take charge of and operate stationary internal combustion engines where
there is no other equipment requiring a licensed steam and other operating engineer; and
(b) At least one (1) year of experience in the care and operation of internal combustion engines.

 

Industrial Training School
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Stationary High-Pressure Steam Engineer is an operating engineer that is licensed though competency by examinations for grades third through chief.  In the USA alone there are 100s of thousands of high pressure boilers alone in manufacturing or district heating, institutions, medical centers, public sector and with the vast majority in the private sector.

Chief Engineer of a stationary high-pressure steam plant has a leadership position and needs to command the steam plant operation economically and safety.

A 3rd Class Engineer in a stationary high-pressure steam engineer is a watch engineer.  This is also an entry level into Stationary High-Pressure Steam Engineering licensing too.  To be a candidate for a  3rd class is possible by going through an accredited learning program at a School or College or transition from LP Boiler Operator's license.  A more traditional path to 3rd Class stationary high-pressure engineers license is by experience.

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Gas Turbine Operating Engineers are in demand for gas fired peaking power plants.  Gas turbines or combustion turbines as they are also called as well as simple cycle.

These gas turbines can be brought on-line producing 100s of MW in minutes when a wind-farm looses its wind or a cloud shades a photovoltic region.  So, this is especially important with more and more usage of photovoltic and wind power generators that cannot power a manufacturing base of a country or a large population since they are dependent on weather and more importantly solar activities.  Therefore, being a gas turbine 3rd Class, 2nd Class or 1st Class Gas Turbine Engineer is important to off-set the loss of base load fossil fuel power stations to meet the demand of the electric power grids.

Gas turbines come is three difference or basic catagories:  Large frame combustion turbines, large aero-derivative gas turbines, and micro-turbines.  Areo-derivative gas turbines are uses as a rule for peaking power stations.

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