North Dakota Administrative Code

1. Each steam boiler must have a steam gauge, with dial range not less than one and one-half times the pressure at which the safety valve is set, connected to the steam space or to the steam connection to the water column. The steam gauge must be connected to a siphon or equivale…

All steam traction engines that are of nonstandard boiler construction are limited to a maximum allowable working pressure of one hundred pounds per square inch [690 kilopascals], unless a thorough ultrasonic thickness survey, engineering analysis, and other inspections, approved…

1. It is the duty of the owner or user of any steam traction engine on wheels to notify the chief boiler inspector of sale or other disposition of steam traction engines. 2. Within ten days of purchase, any person purchasing any steam traction engine shall notify the chief boiler…

The National Board Inspection Code referenced in this article must be used for the inspection and repair of all steam traction engines unless otherwise noted in this article. History: Effective July 1, 2020. General Authority: NDCC 23.1-16-05 Law Implemented: NDCC 23.1-16-05 10…

1. All new boilers, except those exempt by law, to be installed in North Dakota must be reported to the chief boiler inspector by the owner or user and by the installer. 2. A miniature boiler, except one exempt by law, may not be installed in North Dakota unless it has been const…

The rules adopted for power boilers applying to strength of materials and calculations to determine maximum allowable working pressure must be used for miniature boilers unless a special rule is stated in those rules. History: Effective July 1, 2020. General Authority: NDCC 23.1-…

The maximum allowable working pressure for standard boilers on the shell of a boiler or drum must be determined by section 33.1-14-05-01. History: Effective July 1, 2020. General Authority: NDCC 23.1-16-07 Law Implemented: NDCC 23.1-16-07

Nonstandard miniature boilers: 1. Must conform to all requirements of this chapter. 2. Must have a factor of safety as given in subsection 5 of section 33.1-14-05-02. 3. Must be given an initial inspection that must include a hydrostatic pressure test. 4. May not have solder or s…

1. Each miniature boiler must be equipped with an American society of mechanical engineers approved safety valve set at or below the maximum allowable working pressure. 2. The safety valve must be plainly marked by the manufacturer showing name or identifying trademark, nominal d…

1. Each miniature boiler must be equipped with a water gauge glass for determination of water level. 2. The lowest permissible water level must be at a point one-third of the height of the shell, except where the boiler is equipped with internal furnace in which case it may not b…

1. Every miniature boiler must be provided with at least one feed pump or other mechanical feeding device except if the following conditions exist: a. If the boiler is connected to a water main or system having sufficient pressure to feed the boiler at any time while under pressu…

1. Each miniature boiler must be provided with a blowoff connection not less than one-half inch [12.7 millimeter] iron pipe size, directly connected with the lowest water space. 2. Blowoff piping may not be galvanized and must be provided with a valve or cock. History: Effective …

Each miniature boiler must be equipped with a steam gauge having a dial range not less than one and one-half times the safety valve setting. The gauge must be connected to the steam space or to the steam connection to the gauge glass by a brass or bronze composition siphon tube, …

The steam piping from a miniature boiler must be provided with a stop valve located as close to the boiler shell or drum as is practicable, except in those cases where the boiler and steam receiver are operated as a closed system. 3 History: Effective July 1, 2020. General Author…

Each gas-fired boiler must be equipped with a four inch [10.16 centimeter] vent pipe or flue extended to an approved location outside the building or connected to a chimney flue. If the horizontal run is more than ten feet [3.05 meters], the vent must be increased to six inches […

1. The owner and user of any steam traction engine or boiler on wheels shall notify the chief boiler inspector of sale or other disposition of steam traction engines. 2. Within ten days of purchase, any person purchasing any steam traction engine shall notify the chief boiler ins…

The steam pressure gauge must show the pressure at which the boiler is actually being operated. Adjustments to the gauge to show a lesser pressure are prohibited, and if any gauge has been so adjusted, such act will be considered a willful violation of this section. History: Effe…

1. Unless exempt by this article, a heating or low-pressure boiler may not be installed in this state unless it has been constructed, inspected, and stamped to conform with section IV of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code and is approved,…

The maximum allowable working pressure of a boiler built in accordance with the American Society of Mechanical Engineers Code may not exceed the pressure indicated by the manufacturer's identification stamped or cast upon the boiler or upon a plate secured to it. History: Effecti…

The maximum allowable working pressure on the shell of a noncode riveted heating boiler must be determined in accordance with section 33.1-14-05-01 except that the maximum allowable working pressure of a steam heating boiler may not exceed fifteen pounds [103 kilopascals] and a h…

The maximum allowable working pressure of a noncode steel or wrought iron heating boiler of welding construction may not exceed fifteen pounds [103 kilopascals]. For other than steam service, the maximum allowable working pressure must be calculated in accordance with section IV …

1. The maximum allowable working pressure of a noncode boiler composed principally of cast iron may not exceed fifteen pounds [103 kilopascals] for steam service or thirty pounds [206.85 kilopascals] for hot water service. 2. The maximum allowable working pressure of a nonstandar…

A radiator in which steam pressure is generated at a pressure of fifteen pounds [103 kilopascals] or less is considered a low-pressure boiler. History: Effective July 1, 2020. General Authority: NDCC 23.1-16-05 Law Implemented: NDCC 23.1-16-05

If in the judgment of the inspector, a boiler is unsafe for operation at the pressure previously approved, the pressure must be reduced, proper repair made, or the boiler retired from service. History: Effective July 1, 2020. General Authority: NDCC 23.1-16-05 Law Implemented: ND…

1. Safety valve requirements for steam boilers are: a. Each steam boiler must have one or more American Society of Mechanical Engineers approved safety valves of the spring-pop type adjusted and sealed to discharge at a pressure not to exceed fifteen pounds per square inch [103 k…

1. Each steam boiler must have a steam gauge or a compound steam gauge connected to its steam space or to its water column or to its steam connections. The gauge or connection must contain a siphon or equivalent device that will develop and maintain a water seal that will prevent…

1. Each steam boiler must have one or more water gauge glasses attached to the water column or boiler by means of valved fittings not less than one-half inch [12.70 millimeter] pipe size, with the lower fitting provided with a drain valve of the straight type with opening not les…

1. If a steam boiler may be closed off from the heating system by closing a steam stop valve, there must be a check valve in the condensate return line between the boiler and the system. 2. If any part of a steam heating system may be closed off from the remainder of the system b…

1. Feedwater connections must be independent of any water gauge connections and be made to the condensate return pipe or reservoir of the condensate return tank. 2. Alternatively, makeup water or water treatment may be introduced through an independent connection. The water flow …

1. Each hot water boiler must have a pressure or altitude gauge connected to it or to its flow connection in such a manner that it cannot be shut off from the boiler except by a cock with tee or lever handle placed on the pipe near the gauge. The handle of the cock must be parall…

Each hot water boiler must have a thermometer located and connected so that it is easily readable when observing the water pressure or altitude. The thermometer must be located so that it will at all times indicate the temperature in degrees Fahrenheit [Celsius] of the water in t…

Each automatically fired hot water boiler must be protected from over temperature by two temperature-operated controls. 1. Each individual automatically fired water boiler must have a safety limit control that will cut off the fuel supply to prevent water temperature from exceedi…

Each automatically fired steam boiler must be protected from over pressure by two pressure-operated controls. 1. Each automatically fired steam boiler must have a safety limit control that will cut off the fuel supply to prevent steam pressure from exceeding the fifteen pounds pe…

1. All hot water heating systems incorporating hot water tanks or fluid relief columns must be so installed as to prevent freezing under normal operating conditions. 2. Systems with open expansion tank. If the system is equipped with an open expansion tank, an indoor overflow fro…

Each condensate return pump where practicable must be provided with an automatic water level control set to maintain the water level within the limits of two gauge cocks. History: Effective July 1, 2020. General Authority: NDCC 23.1-16-07 Law Implemented: NDCC 23.1-16-07

Whenever repairs are made to fittings or appliances or it becomes necessary to replace them, all work must comply with all requirements for new installations. History: Effective July 1, 2020. General Authority: NDCC 23.1-16-07 Law Implemented: NDCC 23.1-16-07

1. Each automatically fired hot water heating boiler must have an automatic low-water fuel cutoff that has been designed for hot water service and which can be tested without draining the system or the boiler. It must be so located as to automatically cut off the fuel supply prio…

1. Individual modules must be limited to a maximum input of four hundred thousand British thermal units [4.22 x 10 to the eighth power joules] per hour (gas), three gallons [11.36 liters] per hour (oil), or one hundred fifteen kilowatt-hours (electricity). 2. Each module of a mod…

1. Each steam boiler having a capacity over twenty-five gallons [94.6 liters] must have a bottom blowoff connection fitted with a valve or cock connected to the lowest water space practicable with a minimum size as shown below: Minimum Required Safety Valve Capacity in Steam Boil…

1. A manually operated emergency shutoff switch or circuit breaker must be located just outside the boiler room door and marked for easy identification. Consideration should be given to the type and location of the switch to safeguard against tampering. If the boiler room door is…

1. Unfired pressure vessels may not be installed in North Dakota unless such vessels have been constructed in accordance with the American society of mechanical engineers boiler and pressure vessel code, section VIII, division 1, 2, or 3, and bear the American Society of Mechanic…

These rules apply only to new construction, except as noted below: 1. Reinstalled pressure vessels must meet the rules for new construction. Exception: national board registration is required only for those vessels ordered and constructed after November 1, 1987. 2. Repairs to unf…

If, due to a valid impediment to compliance with the American Society of Mechanical Engineers Code in its entirety, an unfired pressure vessel cannot bear the American society of mechanical engineers and national board stamping, details in the English language, and specifications…

Unfired pressure vessels that have been previously used in anhydrous ammonia service may be converted to liquid petroleum service only with all of the following conditions being met: 1. The pressure vessel is American Society of Mechanical Engineers Code constructed and national …

1. "Director" means the director of the department of environmental quality. 2. "Hobby boiler" means a hand-fired steam boiler that operates above fifteen pounds per square inch [103.42 kilopascals] gauge pressure operated during a parade, an exhibition, or a threshing show where…

1. Except as provided in subsection 3, no individual may operate a hobby boiler in this state unless licensed under this chapter. 2. The director may not issue a hobby boiler license to an individual unless the individual: a. Files a written application with the director on a for…

An individual who has operated a hobby boiler within this state as of July 1, 2007, may receive a license without complying with subdivisions b and c of subsection 2 of section 33.1-14-11-02. "Operated a hobby boiler" means demonstrated operating experience in boiler operations a…

An individual applying for a hobby boiler operator license must complete an application in the form provided by the director, pay any required fee, and provide a notarized affidavit signed by a licensed North Dakota hobby boiler operator attesting to the applicant's completion of…

A hobby boiler operator license is valid for six years except that an initial license expires on January first of the year after the license has been in effect for five years. History: Effective July 1, 2020. General Authority: NDCC 23.1-16-09 Law Implemented: NDCC 23.1-16-09

An individual may apply to renew a hobby boiler operator license for six years by submitting to the director a renewal request along with a twenty-five dollar renewal fee in advance of the license expiration date. History: Effective July 1, 2020. General Authority: NDCC 23.1-16-0…