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

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3. Boilers and unfired pressure vessels used for domestic purposes in private dwellings and apartment houses of eight or
fewer apartments.
4. Unfired pressure vessels (other than the above):
a. With a maximum allowable working pressure of 15 psi or less;
b. Having a volume of 5 cubic feet or less or coil-type steam generators without accumulative drum;
c. Vessels used in connection with or for the storage of liquified petroleum gases.
5. Hot-water heaters under 200,000 BTU per hour, except those heaters located in hospitals, schools, day-care centers,
and nursing homes.
6. Hot-water supply storage tanks which are heated by steam or any other direct or indirect means:
a. When heat input is less than 200,000 BTU per hour;
b. When water temperature is less than 210°F;
c. When the vessel has a nominal water-containing capacity of less than 120 gallons.
7. Pressure vessels which are:
a. An integral part of components of rotating or reciprocating mechanical devices and hydraulic or pneumatic
cylinders where the primary design considerations and stresses are derived from the functional requirements of
the device;
b. An integral part of the structure and have a primary function of transporting fluids from one location to another
within a system.
8. Vessels with a nominal water-containing capacity of 120 gallons or less for containing water under pressure, including
those containing air, the compression of which serves only as a cushion.
9. Boilers and unfired pressure vessels used in connection with the production, distribution, storage, or transmission of oil,
natural gas, or casinghead gas.
ObJeCtS SUbJeCt tO rUleS FOr FIelD InSpeCtIOn
Same as OBJECTS SUBJECT TO RULES FOR CONSTRUCTION AND STAMPING.
Except: Air storage vessels located in service stations and garages.
InSpeCtIOnS reQUIreD
Boilers and fired pressure vessels:
1. One annual internal inspection.
2. One annual external inspection.
3. Unfired pressure vessels every two years.
4. Boilers, gas, and electric water heaters located in schools, nursing homes, day-care centers, and hospitals: Once annually.
5. Low-pressure steam-heating boilers: One internal inspection every three years.
InSUranCe InSpeCtIOn reQUIrementS
1. Inspections made by inspectors employed by insurance companies and commissioned by the department are accepted
in lieu of inspections made by a department inspector, except field inspections of anhydrous ammonia vessels.
2. Reports of inspection must be filed with the department on National Board forms within 30 days after inspection.
Failure to file within 60 days after due date will result in a $100.00 fee plus expenses charged to the insurance company.
Permission for an extension of time may be granted by the chief inspector.
3. The department must be notified by wire of suspension of insurance on account of dangerous conditions, followed by a
report on approved forms.
4. The department must be notified of new business and discontinuance of insurance on approved forms.
CertIFICate OF InSpeCtIOn
1. Certificate of Inspection, valid for one year, is issued by the department for boilers and fired pressure vessels. The fee is
$15.00, payable by the owner or user directly to the department.
2013 National Board Synopsis of Boiler and Pressure Vessel Laws, Rules and Regulations