ing Boilers
0800-3-3-.02
Adoption by Reference
0800-3-3-.07 Existing
Pressure
Vessels
0800-3-3-.03 Administration
0800-3-3-.08 Historic
Boilers
0800-3-3-.04 General
Requirements
0800-3-3-.09 Fees
0800-3-3-.05
Existing Power Boilers


0800-3-3-.01 DEFINITIONS.

(1)
Act means the provisions of Tennessee Code Annotated (T.C.A.), Title 68, Chapter 122.

(2)
Alteration means a change in any item described on the original Manufacturers Data Report which
affects the pressure containing capability of the boiler or pressure vessel. Non-physical changes, such
as an increase in the maximum allowable working pressure (internal or external), increase in design
temperature, or a reduction in minimum temperature of a boiler or pressure vessel shall be considered
an alteration.

(3)
ANSI means the American National Standards Institute.

(4)
API means the American Petroleum Institute.

(5)
Approved means approved by the Board of Boiler Rules.

(6)
ASME Code means the American Society of Mechanical Engineers Code.

(7) Authorized
Inspection Agency means:

(a)
A jurisdiction as defined by paragraph (21) of this rule; or

(b)
An insurance company which has been licensed or registered by the appropriate authority of a
state of the United States or a province of Canada to write boiler and pressure vessel insurance
and to provide all inspection services required by the Act for boilers and pressure vessels
insured by such company in this State.

(8)
Board means the Board of Boiler Rules.

(9) Boiler means and includes a closed vessel or vessels intended for use in heating water or other
liquids or for generating steam or other vapors under pressure or vacuum by the direct application of
heat from combustible fuels, electricity, or nuclear energy, and also includes an unfired pressure
vessel, meaning a vessel in which pressure is obtained from an external source or from an indirect
application of heat.

(a)
Power boiler means a boiler in which steam or other vapor is generated at a pressure of more
than 15 psig.

(b)
High-temperature water boiler means a water boiler intended for operation at pressures in
excess of 160 psig or temperatures exceeding 250°F.
March, 2007 (Revised)
1 BOILER INSPECTIONS
CHAPTER 0800-3-3

(Rule 0800-3-3-.01, continued)


(c)
Heating boiler means a steam or vapor boiler operating at pressures not exceeding 15 psig or a
hot water boiler operating at pressures not exceeding 160 psig or temperatures not exceeding
250°F.

(d)
Electric boiler means a power or heating boiler in which the source of heat is electricity.

(e)
Miniature boiler means a power or high-temperature water boiler which does not exceed the
following limits:

1.
16 inches inside diameter of shell;

2.
20 square feet of heating surface (not applicable to electric boilers);

3.
5 cubic feet of gross volume exclusive of casing and insulation; and

4.
100 psig maximum allowable working pressure.

(f)
Unfired steam boiler means an unfired pressure vessel or system of unfired pressure vessels
intended for operation at a pressure in excess of 15 psig steam for the purpose of producing and
controlling an output of thermal energy.

(g)
Waste heat boiler means an unfired pressure vessel or system of unfired pressure vessels
intended for operation in excess of 15 psig steam for the purpose of producing and controlling
an output of thermal energy.

(h)
Heat recovery boiler means a vessel or system of vessels comprised of one or more heat
exchanger surfaces used for the recovery of waste heat.

(i)
Steam heating boiler means a steam boiler for operation at pressures not exceeding 15 psig.

(j)
Hot water heating boiler means a boiler in which no steam is generated, from which hot water
is circulated for heating purposes and then returned to the boiler, and which is operated at a
pressure not exceeding 160 psig and/or a temperature of 250ºF at or near the boiler outlet.

(k)
Hot water supply boiler means a boiler completely filled with water that furnishes hot water
to be used externally to itself at pressures not exceeding 160 psig and/or a temperature of 250ºF
at or near the boiler outlet.

(l)
Portable boiler means a boiler which is primarily intended for temporary location, where the
construction and usage permits it to be readily moved from one location to another.

(m) Potable hot water heater means a heater supplying potable water for commercial purposes in
which the pressure does not exceed 160 psig and the temperature does not exceed 210ºF.

(10) BTU/hr means British Thermal Units per hour.

(11) Certificate inspection means an inspection, the report of which is used by the Chief Inspector as
justification for issuing, withholding, suspending or revoking a certificate of inspection. This
certificate inspection shall be an internal inspection when required; otherwise, it shall be as complete
an inspection as possible.

(a)
Internal inspection means an inspection that can reasonably be conducted on the internal and
external surfaces of a boiler or pressure vessel while it is shut down and the manhole plates,
handhole plates or other inspection opening closures are removed.
March, 2007 (Revised)
2 BOILER INSPECTIONS
CHAPTER 0800-3-3

(Rule 0800-3-3-.01, continued)


(b) External inspection means an inspection made when a boiler or pressure vessel is in
operation, if possible.

(12) Certificate of competency means a certificate issued to a person who has passed the examination
prescribed by the Board pursuant to T.C.A. § 68-122-109.

(13) Certificate of inspection means a certificate issued for operation of a boiler or pressure vessel as
required in T.C.A. § 68-122-111.

(14) Commission means the commission issued by the National Board of Boiler and Pressure Vessel
Inspectors to a holder of a certificate of competency who desires to make shop or field inspections in
accordance with the National Board Rules for Commissioned Inspectors, and whose employer submits
the inspectors application to the National Board for such commission.

(15) Condemned boiler or pressure vessel means a boiler or pressure vessel that has been inspected and
declared unsafe, or disqualified by legal requirements, by an inspector qualified to take such action
who has applied a stamping or marking designating its rejection.

(16) Department means the Tennessee Department of Labor and Workforce Development.

(17) Existing installation means any boiler constructed, installed, placed in operation, or contracted for
before July 1, 1955.

(18) Historic power boilers means any steam traction engine, portable or stationary, standard or
nonstandard power boiler, including free-lance and scale models, owned by publicly operated
museums, non-profit organizations and individuals who preserve, maintain, exhibit and only
occasionally operate these boilers on a not-for-profit basis and for the primary purpose of perpetuating
the agricultural and pioneer heritage of Tennessee.

(a)
This definition shall be interpreted to include the following two types of historic boilers:

1.
Traditional: Any steam traction engine, portable or stationary, standard or nonstandard
power boiler that was constructed prior to July 1, 1949.

2.
Nontraditional: Any free-lance and scale models, standard or nonstandard power boiler
that was constructed after July 1, 1949.

(i)
Free-lance is any nontraditional historic power boiler built without original
drawings, calculations or blueprints.

(ii)
Scale model is any nontraditional historic power boiler built as an exact or scale
replica of a traditional historic power boiler.

(19) Inspector means the Chief Inspector, Deputy Inspector, or Special Inspector.

(a)
Chief Inspector is the Chief Boiler and Pressure Vessel Inspector appointed pursuant to T.C.A.
§ 68-122-106.

(b)
Deputy Inspector is any inspector appointed pursuant to T.C.A. § 68-122-107.

(c)
Special Inspector is an inspector holding a Tennessee certificate of competency, and who is
continuously employed by an insurance company authorized to insure against loss from
explosion of boilers or pressure vessels in this State, or a company owning or operating pressure
vessels (Owner-User Inspection Agency) in this State for the purposes of making inspections of
March, 2007 (Revised)
3 BOILER INSPECTIONS
CHAPTER 0800-3-3

(Rule 0800-3-3-.01, continued)

pressure vessels used or to be used by such company, and provided such company complies
with the requirements of T.C.A. § 68-122-108.

1.
A special inspector shall receive no salary from, nor shall any of their expenses be paid
by, the State, and the continuance of a special inspector's commission shall be
conditioned upon the special inspector continuing in the employ of a boiler insurance
company duly authorized as aforementioned or upon continuing in the employ of a
company operating unfired pressure vessels in this State, and upon the special inspector's
maintenance of the standards imposed by the Act.

2.
A special inspector of a company operating unfired pressure vessels shall not be
authorized to inspect boilers.

3.
A special inspector shall inspect all boilers and unfired pressure vessels insured or all
unfired pressure vessels operated by their respective companies and, when so inspected,
the owners and users of such boilers and unfired pressure vessels shall be exempt from
the payment to the State of the inspection fee