Laws, Rules and Regulations - The National Board of Boiler and ...

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ObJeCtS SUbJeCt tO rUleS FOr COnStrUCtIOn anD StampInG
All boilers and pressure vessels, except the following:
1. Boilers owned or operated by the federal government.
2. Locomotive boilers of carriers subject to Federal Locomotive Inspection Act.
3. Boilers located in private residences and in apartment houses having fewer than six families.
4. Boilers in any city where city boiler inspectors, record-keeping, and inspection codes are comparable to the state
program.
5. Service and domestic-type water heaters that are:
a. Less than 200,000 BTU per hour input;
b. Less than 120 gallons;
c. Operated at less than 210°F.
6. Vessels having an internal or external operating pressure less than 15 psi with no limitation on size.
7. Vessels having an inside diameter not exceeding 6 inches with no limitation on pressure.
8. Vessels containing water under pressure, including those containing air, the compression of which serves as a cushion,
with design pressure less than 30 psi and design temperature less than 210°F.
9. A hot-water supply storage tank heated by steam or other indirect means when none of the following limitations is
exceeded:
a. Heat input of 200,000 BTU per hour;
b. Water temperature of 210°F;
c. Nominal water-containing capacity of 120 gallons.
10. Boilers and pressure vessels under federal control or regulation.
11. Locomotive boilers used exclusively for a personal hobby.
12. Any other pressure vessel exempted in scope of ASME Code Section VIII, Division 1.
ObJeCtS SUbJeCt tO rUleS FOr FIelD InSpeCtIOn
Same as OBJECTS SUBJECT TO RULES FOR CONSTRUCTION AND STAMPING, except pressure vessels. All new and re-installed
boilers require application to be submitted to the Boiler Inspection Section prior to installation. The application is available on
the Colorado Boiler Inspection website.
InSpeCtIOnS reQUIreD
Boilers:
Power boilers and high-temperature water boilers shall receive a certificate inspection annually. Such boilers where construction
permits shall also receive an internal inspection annually, or when the inspector deems necessary. The internal
inspection frequency may be extended to triennially with prior approval from the Boiler Division.
Low-pressure boilers, water heaters, and direct-fired jacketed steam kettles shall receive a certificate inspection biennially
with an internal inspection for low pressure steam boilers, where construction permits, at least every two years, or when
the inspector deems necessary.
Pressure Vessels:
1. ASME Code vessels (except those exempted above). A pressure vessel shall be considered to be suitable for use in
Colorado if it bears ASME Code stamping. Newly installed vessels must be registered with the National Board.
2. A non-ASME Code pressure vessel shall not be continued in service until certified by the Boiler Inspection Section of
the Division of Oil and Public Safety.
2013 National Board Synopsis of Boiler and Pressure Vessel Laws, Rules and Regulations