PUBLIC PROTECTION
CABINET
Department of Housing,
Buildings and Construction
Division of Plumbing
(Amendment)
815 KAR 15:040. Power boiler and
pressure vessel supplemental requirements.
RELATES TO: KRS 236.030
STATUTORY AUTHORITY: KRS 236.030
NECESSITY, FUNCTION, AND CONFORMITY: KRS
236.030 authorizes the commissioner[executive director], through
the Board of Boiler and Pressure Vessel Rules, to fix reasonable
standards for the safe construction, installation, inspection, and
repair of boilers and pressure piping. This administrative regulation establishes[sets
forth] the specific requirements for power boilers that[which]
are within the scope of Section I of the ASME Boiler and Pressure Vessel Code.[This
amendment is necessary to comply with KRS Chapter 13A and to set forth
additional specific requirements for new and existing power boilers which do
not apply to other vessels.]
Section 1. New Installations. (1) Power
boilers.
(a) A power boiler[All power
boilers] shall be constructed in accordance with applicable provisions of
the ASME Boiler and Pressure Vessel Code incorporated in 815 KAR 15:025,
Section 1(1), and [Title]815 KAR Chapter 15[of the Kentucky
administrative regulations].
(b) Pressure piping beyond the
first (or second) stop valve shall comply with the codes and standards
applicable to pressure piping as established by[ASME Code for Pressure
Piping adopted by reference in] 815 KAR 15:025, Section 1(4)[1(3)].
(2) Installation.[:]
(a) A vessel[Vessels]
subject to external corrosion shall be so installed that there is sufficient
access to all parts of the exterior to permit proper inspection of the exterior
surfaces, otherwise sufficient protection against corrosion shall be provided,
or the vessel shall be of a[such] size, dimension, and connection[connected]
that the vessel[it] can be readily removed from its location for
inspection.
(b) A vessel[Vessels]
having a handhole, manhole, or cover plate[handholes, manholes, or
cover plates] to permit inspection of interior surfaces shall be so
installed that each opening is[these openings are] readily
accessible.
(c) If a[When] cylindrical vessel
is[vessels are] installed in a vertical position and subject to
corrosion, the bottom head, if dished, shall[should] be concave
to pressure to facilitate proper drainage.
(d) The installed vessel shall be so
located that the stamping or marking shall be accessible to the boiler
inspector, special inspector, or owner-user inspector and shall not be obstructed[obliterated]
by insulation or other covering not readily removable.
(3) Pressure relieving devices (pressure
vessels).[:]
(a) A single pressure relieving device[devices]
shall be set to operate at a pressure not exceeding the maximum allowable
working pressure (MAWP) of the vessel.
(b)1. A[All] pressure vessel[vessels]
other than an unfired steam boiler[boilers] shall be
protected by a pressure relieving device that shall prevent the pressure within
the vessel from rising more than ten (10)[five (5)] percent above
the maximum allowable working pressure (MAWP) when full open and discharging,
except as established in paragraphs (c), (d), and (j)[ and (d)]
of this subsection.
2. An unfired steam boiler[boilers]
shall have protective devices as required by this administrative regulation.
3. An unfired steam boiler shall be
equipped with pressure relieving devices required by ASME Section I.
(c) The aggregate capacity of the
pressure relieving devices connected to any vessel or system of vessels for the
release of a liquid, air, steam, or other vapor shall be sufficient to
discharge the maximum quantity that can be generated or supplied to the
attached equipment without permitting a rise in pressure within the vessel or
more than sixteen (16) percent above the maximum allowable working pressure
(MAWP) of the vessel when all pressure relieving devices are full open and
discharging.
(d) If[Where] an additional
hazard can be created by exposure of a pressure vessel to fire or other
unexpected sources of external heat, supplemental pressure relieving devices
shall be installed capable of protecting against excessive pressure. These
supplemental pressure relieving devices shall be capable of preventing the
pressure from rising more than twenty-one (21) percent above the maximum
allowable working pressure (MAWP).
(e) A pressure relieving device[devices]
shall be constructed, located, and installed so that the device is[they
are] readily accessible for inspection and repair and[so that they]
cannot be readily rendered inoperative and shall be selected on the basis of
their intended service.
(f) Safety, safety relief, and relief
valves shall be of the direct spring loaded type.
(g) Pilot operated pressure relief valves
may be used. The pilot shall be[, provided that the pilot is]
self-actuated and the main valve shall[will] open automatically
at not over the set pressure and shall[will] discharge the
valve’s[its] full rated capacity if some essential part of the pilot
should fail.
(h)1. The spring in a pressure
relief valve in service for pressures up to and including 250 psi shall not be
reset for any pressure more than ten (10) percent above or below that for which
the valve is marked.
2. For higher pressures, the
spring shall not be reset for any pressure more than five (5) percent above or
five (5) percent below that for which the safety or relief valve is marked.
(i) The set pressure tolerances, plus or
minus, of pressure relief valves shall not exceed two (2) psi for pressures up
to and including seventy (70) psi and three (3) percent for pressures above
seventy (70) psi. All other requirements regarding over pressure protection
devices shall be in accordance with UG-125[UG 125] through UG-140[UG
136] of ASME Pressure Vessel Code, Section VIII, Division 1.
(j)1. If a pressure relieving device is
omitted or removed, the device shall be omitted or removed in accordance with
ASME Section VIII, Division 1, UG-140, Appendix M and ASME Section VIII,
Division 2, Part 9, or Division 3, Part KR.
2. If a pressure relieving device is
omitted or removed pursuant to the standards established in subparagraph 1. of
this paragraph, except ASME Section VIII, Division 1, Appendix M., the Boiler
Section shall be notified prior to the omission or removal, and prior to the
pressure vessel being placed in service.
3. The required documentation shall be
submitted to the Boiler Section for review and acceptance or rejection of the
proposed omission or removal.
Section 2. Maximum Allowable Working
Pressure for Existing Installations. (1) Maximum allowable working pressure (MAWP)
for standard boilers and pressure vessels. The maximum allowable working
pressure (MAWP) for a standard boiler or[boilers and]
pressure vessel[vessels] shall be determined in accordance with
the applicable provision of the edition of ASME Boiler and Pressure Vessel Code
under which the boiler or pressure vessel was[they were]
constructed and stamped.
(2) Maximum allowable working pressure (MAWP)
for nonstandard boilers.
(a) The maximum allowable working
pressure (MAWP) on the shell of a nonstandard boiler, pressure vessel,
or drum shall be determined by the strength of the weakest section of the
structure, computed from the thickness of the plate, the tensile strength of
the plate, the efficiency of the longitudinal joint or tube ligaments, the
inside diameter of the weakest course, and the factor of safety allowed
by paragraph[subsection] (h) of this subsection[section].
(b) Formulas. (TS times t times E)
divided by (R times FS) equals maximum allowable working pressure in psig;
where:[,]
[1.]TS = ultimate tensile strength
of shell plates psi.
[2.]t = minimum thickness of shell
plate, of weakest course, in inches.
[3.]E = efficiency of longitudinal
joint.
R = inside radius of the weakest
course of the shell or drum in inches.
FS = factor of safety permitted.
(c) For riveted construction, E shall[may]
be determined under Paragraph A-30 of ASME Section I,[PR-15 of ASME]
Boiler and Pressure Vessel Code for Power Boilers.
(d) For tube ligaments, E shall be
determined by rules given in Paragraphs PG-52 and 53 of ASME Section I, Boiler
and Pressure Vessel Code for Power Boilers. For seamless construction, E shall
be considered 100 percent.
[R = inside radius of the weakest
course of the shell or drum in inches.
FS = factor of safety permitted.]
(e) Tensile strength. If[When]
the tensile strength of steel or wrought iron shell plates is not known, the
tensile strength[it] shall be assumed to be[taken at]
55,000 psi for steel and 45,000 psi for wrought iron.
(f) Crushing strength of mild steel. The
resistance to crushing of mild steel shall be taken at 95,000 psi of cross
section area.
(g)1. Strength of rivets in shear.
In order to compute[When computing] the ultimate strength of
rivets in shear, the following values in pounds psi of the cross sectional area
of the rivet shank shall be used:
Iron rivets in single shear
38,000 lbs.
Iron rivets in double shear
76,000 lbs.
Steel rivets in single shear
44,000 lbs.
Steel rivets in double shear
88,000 lbs.
2. If[When] the diameter of
the rivet holes in the longitudinal joints of a boiler is not known, the
diameter and cross sectional area of rivets, after driving, may be selected
from the following table or as ascertained by cutting out one (1) rivet in the
body of the joint:
SIZES OF RIVETS BASED ON PLATE THICKNESS
(In Inches)
Thickness of plate
1/4
9/32
5/16
11/32
3/8
13/32
Diameter of rivet after driving
11/16
11/16
3/4
3/4
13/16
13/16
Thickness of plate
7/16
15/32
1/2
9/16
5/8
-----
Diameter of rivet after driving
15/16
15/16
15/16
1 1/16
1 1/16
-----
(h) Factors of safety. The following
factors of safety shall be increased by the boiler inspector or special inspector
if required by the condition and safety of the boiler[demand it]:
1. The lowest factor of safety
permissible on existing installations shall be four and one-half (4 1/2)[five-tenths
(4.5)] except for horizontal return tubular boilers having continuous
longitudinal lap seams more than twelve (12) feet in length where the factor of
safety shall be eight (8), but if[when] the boiler is removed
from its existing setting, the boiler[it] shall not be
reinstalled for pressure in excess of fifteen (15) lbs. psig.
2. A reinstalled or secondhand
nonstandard boiler[boilers] shall have a minimum factor of safety
of six (6) if[when] the longitudinal seams are of lap riveted
construction and minimum factor of safety of five (5) if[when]
the longitudinal seams are of butt and double strap construction.
(3) Age limit of fire tube boilers. The
age limit of a horizontal return tubular, flue, or cylinder boiler
having a longitudinal lap joint and operating at a pressure in excess of fifty
(50) lbs. psig shall be twenty (20) years.
(4) Welded boilers. A boiler[Boilers]
having either longitudinal or circumferential seams of fusion welded
construction shall have been constructed and stamped in accordance with[the
rules and regulations of the] ASME Section I, Boiler and Pressure
Vessel Code for Power Boilers or shall have the standard stamping of a state
that has adopted a standard of construction equivalent to the standards of[the]
ASME Section I[Code for Power Boilers and Pressure Vessels].
(5) Cast iron headers and mud drums. The MAWP[maximum
allowable working pressure] on a water tube boiler, the tubes of which are
secured to cast iron or malleable iron headers, or which have cast iron mud
drums, shall not exceed 160 lbs. psig.
(6) Pressure on cast iron boilers. The maximum
allowable working pressure (MAWP) for any cast iron boiler, except for
hot water boilers, shall be fifteen (15) lbs. psig.
(7) Safety valve requirements for power
boilers.[:]
(a) A weighted lever[The use of
weight-level] safety valve[valves] shall not be used and the valve[valves]
shall be replaced by a safety valve[valves] that conforms[conform]
to the requirements of[the] ASME Section I[Code for Power
Boilers].
(b) A safety valve[valves]
having either the seat or disc of cast iron shall not be used.
(c) Each boiler shall have at least one
(1) safety valve, and, if the boiler[it] has more than 500 square
feet of water heating surface, the boiler[it] shall have two (2)
or more safety valves.
(d) A safety valve[valves]
and a safety relief valve[valves] shall be installed with the
valve’s[their] spindles vertical.
(e)1. The method of computing the
steam generating capacity of the boiler shall be as established[given]
in paragraph A-12 of[the] ASME Section I[Boiler and Pressure
Vessel Code for Power Boilers].
2. The safety valve or valves
shall be connected to the boiler, independent of any other steam connection,
and attached to the boiler, without intervening pipe or fittings. If alteration
is required to conform to this requirement, owners and users shall be allowed
one (1) year in which to complete the work.
3. A stop valve[Valves]
shall not be placed between the safety valve and the boiler or on the discharge
pipe (if used) between the safety valve and the atmosphere.
4. If a discharge pipe is used, it
shall be full sized and fitted with an open drain to prevent water lodging in
the upper part of the safety valve or discharge pipe and supported
independently of the safety valve.
5. If an elbow is placed on a
safety valve or discharge pipe, it shall be located close to the safety valve
outlet.
6. A[All] safety valve discharge[discharges]
shall be located or piped to avoid endangering persons using a walkway[walkways]
or platform[platforms] used to control the main valves of a
boiler[boilers] or steam header[headers].
(f) The safety valve capacity of each
boiler shall be sufficient to allow the safety valve or valves to discharge all
the steam generated by the boiler without allowing the pressure to rise more
than six (6) percent above the maximum allowable working pressure (MAWP).
(g)1. For each boiler, one (1) or
more safety valves on the boiler shall be set at or below the maximum allowable
working pressure (MAWP). If an additional valve is[valves
are] used, the highest pressure setting shall not exceed the maximum
allowable working pressure (MAWP) by more than three (3) percent.
2. The complete range of pressure
settings of all of the saturated steam safety valves on a boiler shall not
exceed ten (10) percent of the highest pressure to which any valve is set.
3. If two (2) or more boilers
operating at different pressures and safety valve settings are interconnected,
the lower pressure boilers or interconnected piping shall be equipped with
safety valves of sufficient capacity to prevent overpressure considering the
generating capacity of all boilers.
4. If the boiler is supplied with
feed water directly from a pressure main[mains] without
the use of feeding apparatus (not to include return taps), the safety
valve shall not be set at a pressure greater than ninety-four (94) percent of
the lowest pressure obtained in the supply main feeding the boiler.
(h) The relieving capacity of the safety
valves on any boiler may be checked by one (1) of the three (3)[following]
methods established in subparagraphs 1. through 3. of this paragraph;
and, if found to be insufficient, additional capacity shall be provided.
1.a.[By making] The accumulation
test shall consist[, which consists] of shutting off all other
steam discharge outlets from the boiler and forcing the fires to the maximum.
b. The safety valve capacity shall
be sufficient to prevent a pressure in excess of six (6) percent above the maximum
allowable working pressure (MAWP).
c. This method shall not be used
on a boiler with a superheater or reheater.
2.a.[By measuring] The
maximum amount of fuel that can be burned shall be measured and[computing]
the corresponding evaporative capacity (steam generating capacity) shall be
computed upon the basis of the heating valve of this fuel.
b. This computation may be made as
outlined in the Appendix of the ASME Code for Power Boilers.
3.[By determining] The maximum
evaporative capacity shall be determined by measuring the feed water.
4. If either of the methods established
in subparagraphs 1. through 3. of this paragraph[outlined above] is
employed, the sum of the safety valve capacity shall be equal to or greater
than the maximum evaporative capacity (maximum steam generating capacity) of
the boiler. The minimum safety valve or safety relief valve relieving capacity
for other than electric boilers shall be determined on the basis of the pounds
of steam generated per hour per square foot of boiler heating surface and water
wall heating surface, in accordance with[as given in] the
following table:
MINIMUM POUNDS OF STEAM PER HOUR
PER SQUARE FOOT OF SURFACE
Fire Tube Boilers
Water Tube Boilers
Boiler heating surface
Hand-fired
5
6
Stoker-fired
7
8
Oil-, gas-, or pulverized-fuel-fired
8
10
Waterwall heating surface
Hand-fired
8
8
Stoker-fired
10
12
Oil-, gas-, or pulverized-fuel-fired
14
16
a. If a boiler is fired only by a gas
having a heat value in excess of 200 BTU per cubic foot, the minimum safety
valve or safety relief valve relieving capacity shall[may] be
based on the values given for a hand-fired boiler above.
b. The minimum safety valve or safety
relief valve relieving capacity for electric boilers shall be three and
one-half (3 1/2) pounds per hour per kilowatt input.
(8) Boiler feeding and feed piping.[:]
Except as established in[allowed by] paragraphs (b) through (f)
of this subsection, a boiler[boilers] having more than 500 square
feet of water-heating surface shall have at least two (2) means of feeding
water. Each source of feeding shall be capable of supplying water to the boiler
at a pressure of three (3) percent higher than the highest setting of any
safety valve on the boiler.
(a) Each boiler[All boilers]
shall have a feed supply that[which] allows the boiler to be fed
at any time while under pressure.
(b) A boiler that is[Boilers
that are] fired with solid fuel not in suspension or a boiler which the[and
for boilers whose] setting or heat source can continue to supply sufficient
heat to cause damage to the boiler if the feed supply is interrupted, one (1) of
the means of feeding water required by this subsection[such means of
feeding] shall be steam operated.
(c) 1. A boiler that is[Boilers]
fired by gas, liquid, or solid fuel in suspension[,] may be equipped
with a single means of feeding water if the boiler’s heat input is
immediately shut off by any interruption in the water feed[furnished for
the immediate shut off of the heat input if the water feed is interrupted].
2. If the boiler has a
water-heating surface of not more than 100 square feet, the feed piping and
connection to the boiler shall not be smaller than one-half (1/2) inch pipe
size.
3. If the boiler has a
water-heating surface more than 100 square feet, the feed piping and connection
to the boiler shall not be less than three-fourths (3/4) inch pipe size.
(d) A high temperature water boiler[boilers]
shall be provided with means of adding water to the boiler or system while
under pressure. The feed water shall be introduced into the boiler to prevent
its discharge close to riveted joints of the shell, furnace sheets, directly
against surfaces exposed to gases at high temperature or direct radiation from
the fire.
(e)1. The feed pipe to the boiler
shall be provided with a check valve near the boiler and a stop valve or
cock between the check valve and the boiler.
2. If two (2) or more boilers are
fed from a common source, there shall also be a stop valve[globe]
or regulating valve on the branch to each boiler between the check valve and
source of supply. The stop valve or regulating valve shall be located as
close to the boiler as is practicable.
3. If a globe valve is[valves
are] used on feed piping, the inlet shall be under the disc of the valve.[The
valve shall be located as close to the boiler as is practicable.]
(f) If a de-aerating heater is[heaters
are] not employed,[it is recommended that] the temperature of the
feed water shall be no less than 120 degrees Fahrenheit to avoid the possibility
of setting up localized stress. If a de-aerating heater is[heaters
are] employed,[it is recommended that] the minimum feed water
temperature shall be no less than 215 degrees Fahrenheit so that
dissolved gases will[may] be thoroughly released.
(9) Fusible plugs. A fire-actuated
fusible plug[plugs], if used, shall conform to the requirements
of[the] ASME Section I, Paragraphs[Boiler and Pressure Vessel
Code for Power Boilers, Sections] A-19, A-20 and A-21.
(10) Water columns, gauge glasses, and gauge
cocks.
(a) 1. An outlet connection[connections],
except for a damper regulator, feed water regulator, low-water fuel
cutout, drain[drains], steam gauge[gauges], or
apparatus that does not permit the escape of an appreciable amount of steam or
water, shall not be placed on the piping that connects the water column
to the boiler.
2. The minimum size of the steam
and water connection to the water column shall be one (1) inch pipe size, and
each water column shall be provided with a valved drain of at least three-fourths
(3/4) inch pipe size.
3. The drain shall be piped to a
safe location.
(b) Each manually fired boiler shall
comply with ASME Section I, except a manually fired boiler built before the
publication of the 1991 Addenda to ASME Section I (1989 Edition), which shall
have three (3) or more gauge cocks located within the range of the visible
length of the water glass, except if[when] the boiler has two (2)
water glasses with independent connections to the boiler located on the same
horizontal lines and not less than two (2) feet apart. Two (2) gauge cocks shall
be[are] sufficient for boilers not over thirty-six (36) inches in
diameter in which the heating surface does not exceed 100 square feet.
(c) Each automatically fired boiler
shall comply with ASME Section I[Gauge cocks are not required for
electric boilers operating at pressures not exceeding 400 psi. The gauge cock
connections shall be not less than one-half (1/2) inch pipe size].
(d) For an installation in which[all
installations where] the water gauge glass or glasses are more than thirty
(30) feet from the boiler operating floor,[it is recommended that] water
level indicating or recording gauges shall be installed at eye height
from the operating floor.
(11) Pressure gauges.
(a)1. Each boiler shall have a
pressure gauge connected to the steam space or to the water column or its steam
connection.
2. The pressure gauge shall be
connected to a siphon or equivalent device of sufficient capacity to keep the
gauge tube filled with water and so arranged that the gauge cannot be shut off
from the boiler except by a cock placed near the gauge and provided with a tee
or lever handle arranged to be parallel to the pipe in which it is located when
the cock is open.
3. The dial of the pressure gauge
shall be graduated to approximately double the pressure at which the safety
valve is set, but, in no case to less than one and one-half (1 1/2) times the
pressure.
(b) If a pressure gauge connection longer
than eight (8) feet becomes necessary, a shutoff valve shall[may]
be used near the boiler provided the valve is of the outside screw and yoke
type and is locked or wired open.[The line shall be ample size with
provisions for free blowing.]
(c) Each boiler shall be provided with a
one-fourth (1/4) inch nipple and globe valve connected to the steam space for
the exclusive purpose of attaching a test gauge if[when] the
boiler is in service so that the accuracy of the boiler pressure gauge may be
ascertained.
(12) Stop valves.
(a) Each outlet from a boiler (except
safety valve connections) shall be fitted with a stop valve located as close as
practicable to the boiler.
(b)1. If a boiler[boilers]
provided with a manhole is[manholes are] connected to a common
main, the steam or high temperature water connection from the[each]
boiler shall be fitted with two (2) stop valves having an ample free blow drain
between them.
2. The discharge of this drain
shall be visible to the operator while manipulating the valves and shall be
piped clear of the boiler setting.
3. The stop valves shall consist
of one (1) automatic nonreturn valve (set next to the boiler) and a second
valve of the outside screw and yoke type shall be installed in accordance with ASME
Section I[of the ASME Boiler and Pressure Vessel Code].
(13) Blow-off piping.
(a)1. The construction of the
setting around each blow-off pipe shall permit free expansion and contraction.
2.[Careful] Attention shall
be given to the problem of sealing the[these] setting openings
without restricting the movement of the blow-off piping.
3. All blow-off piping, if[when]
exposed to furnace heat, shall be protected by firebrick or other heat
resisting material constructed to allow close inspection of the piping.
(b)1. If[When] the maximum
allowable working pressure (MAWP) exceeds 100 psig, blow-off piping
shall be extra heavy from the boiler to the valve or valves, and shall be run
full size without use of reducers or bushings.
2. The piping shall be of extra
heavy wrought iron or steel and shall not be galvanized.
3. All fittings between the boiler
and blow-off valve shall be steel or extra heavy fittings of malleable iron.
4. In case of renewal of blow-off
pipe or fittings, installation shall be[they shall be installed]
in accordance with 815 KAR 15:025[rules and administrative
regulations for new installations].
(14) Blowdown valves.
(a)1. Ordinary type straight-run
globe valves in which dams or pockets may exist for the collection of sediment
shall not be used[on these connections].
2. Straightway Y-type globe valves
or angle valves may be used in vertical pipes[,] or[they may be used]
in horizontal runs of piping if the pipe is[provided they are] so
constructed or installed allowing the lowest edge of the opening through the
seat to be at least twenty-five (25) percent of the inside diameter below the
center line of the valve.
(b)1. The blow-off valve or valves
and the pipe between them and the boiler shall be of the same size except if[where]
a larger pipe for the return of condensation is used as provided for by[the]
ASME Section I.
2[Boiler and Pressure Vessel
Code for Power Boilers]. On all boilers, except those used for high
temperature water, traction or portable purposes, if[when] the
allowable working pressure exceeds 100 psi, each bottom blow-off pipe shall
have two (2) slow-opening valves, or one (1) slow-opening valve and a
quick-opening valve, or a cock complying with the requirements of[the]
ASME Section I[Boiler and Pressure Vessel Code for Power Boilers].
(c)1. If a blow-off cock is used,
the plug shall be held in place by a guard or gland and[.] the
plug shall be distinctly marked in line with the passage.
2. A slow-opening valve requires
at least five (5) 360-degree turns of the operating mechanism to change from
full-closed to full-opening, or vice versa.
(d)1. If a boiler has multiple
blow-off pipes, and has a single master valve[may be] placed on
the common blow-off pipe from the boiler,[in which case] only one (1)
valve on each individual blow-off shall be required. In this case, either the
master valve or the individual valves or cocks shall be of the slow-opening
type, or a slow-opening valve and a quick-opening valve or cock may be combined
in one (1) body and may be used if the combined fitting is the equivalent of
two (2) independent slow-opening valves or a slow-opening valve and a
quick-opening valve or cock and if the failure of one (1) to operate cannot
affect the operation of the other.
2. The bottom blow-off pipes of
every traction engine or portable boiler shall have at least one (1)
slow-opening or quick-opening blow-off valve or cock conforming to the
requirements of ASME Section I[of the ASME Boiler and Pressure Vessel
Code].
3. Only one (1) blow-off valve,
which shall be of a slow-opening type, shall be required on forced circulation
and electric boilers having a normal water content not exceeding 100 gallons.
(15) Boiler blowoff equipment. The
blowdown from a boiler or boilers that enters a sanitary sewer system or
blowdown that[which] is considered a hazard to life or property
shall pass through some form of blowoff equipment that will reduce pressure and
temperature as required hereinafter.
(a) The temperature of the water leaving
the blowoff equipment shall not exceed 150 degrees Fahrenheit.
(b) The pressure of the blowdown leaving
any type of blowoff equipment shall not exceed five (5) psig.
(c) The blowoff piping and fittings
between the boiler or boilers and the blowoff tank(s) shall comply with ASME
Section I, Paragraphs PG-58 and PG-59[of the ASME Boiler and Pressure
Vessel Code, Section I].
(d) The blowoff tank construction shall
comply with ASME Section VIII[Pressure Vessel Code, Section VIII
(Division I)].
(e) All materials used in the fabrication
of boiler blowoff equipment shall comply with Material of ASME Section II[Section
II of the ASME Boiler and Pressure Vessel Code].
(f) If[When] a steam
separator is used, the separator[it] shall be designed to
withstand at least twice the operating pressure of the separator and[it]
shall be equipped with a vent, inlet, outlet, and a pressure gauge.
(g) All blowoff equipment shall be fitted
with openings to facilitate cleaning and inspection.
(h) A copy of a booklet for the design,
construction and arrangement of boiler blowoff equipment may be obtained from
the National Board of Boiler and Pressure Vessel Inspectors, whose address is
1055 Crupper Avenue, Columbus, Ohio 43229.
(16) Piping.
(a) Boiler external piping shall be attached
in accordance with ASME Section I and B31.1.
(b)1.[Piping connected to the
outlet of a boiler, which comes with the ASME Boiler and Pressure Vessel Code
requirements, shall be attached as follows:
1. Screwing into a tapped opening with
a screwed fitting or a valve at the other end.
2. Screwing each end into tapered
flanges, fittings, or valves with or without rolling or peening.
3. Bolted joints, including those of
the Van Stone type.
4. Expanding into grooved holes, seal
welding, if desired. Pipe which is expanded, rolled, or peened shall be made
from open-hearth or electric-furnace steel.
(b) If exposed to products of
combustion, blow-off piping of fire-tube boilers shall be attached as outlined
in paragraph 1 of subsection (a) of this section. If not so exposed to products
of combustion, the piping shall be attached as outlined in paragraph (a)1, 2 or
3 of this subsection. Fusion welding for sealing purposes at the junction of
bolted joints may be used.
(c) Welding may be used to attach
piping to nozzles or fittings if the rules for fusion welding or forge welding
are followed.] If two (2) or more boilers with manholes are connected to a
common steam or high temperature water main or header, all welded external
piping from the boiler out to the second stop valve shall be installed by a
manufacturer or contractor authorized to use any one (1) of the ASME[American
Society of Mechanical Engineers] Code symbol stamps for pressure piping, power
boilers, or assembly stamps.
2. The piping or fittings,
adjacent to the welded joint farthest from the boiler, shall be stamped with
the pressure piping, power boiler, or assembly code symbol stamp of the ASME[American
Society of Mechanical Engineers] when approved by the boiler inspector,
special inspector, or owner-user inspector.
GARY A. FECK, Commissioner
AMBROSE WILSON, IV, Secretary
APPROVED BY AGENCY:
October 1, 2015
FILED WITH LRC:
October 7, 2015 at 10 a.m.
PUBLIC HEARING AND
PUBLIC COMMENT PERIOD: A public hearing on this administrative regulation shall
be held on November 24, 2015, at 10:00 a.m., EDT, in the Department of Housing,
Buildings and Construction, 101 Sea Hero Road, Suite 100, Frankfort, Kentucky.
Individuals interested in being heard at this hearing shall notify this agency
in writing by November 17, 2015 (five working days prior to the hearing) of
their intent to attend. If no notification of intent to attend the hearing is
received by that date, the hearing may be canceled. The hearing is open to the
public. Any person who wishes to be heard will be given an opportunity to
comment on the proposed administrative regulation. A transcript of the public
hearing will not be made unless a written request for a transcript is made. If
you do not wish to be heard at the public hearing, you may submit written
comments on the proposed administrative regulation. Written comments shall be
accepted until November 30, 2015. Send written notification of intent to be
heard at the public hearing or written comments on the proposed administrative
regulation by the above date to the contact person:
CONTACT PERSON: Michael
T. Davis, General Counsel, Department of Housing, Buildings and Construction, 101
Sea Hero Road, Suite 100, Frankfort, Kentucky, 40601-5412, phone 502-573-0365 ext.
144, fax 502-573-1057.
REGULATORY
IMPACT ANALYSIS AND TIERING STATEMENT
Contact person: Michael
T. Davis
(1) Provide a brief
summary of:
(a) What this
administrative regulation does: This administrative regulation sets forth the supplemental
requirements for power boilers and pressure vessels.
(b) The necessity
of this administrative regulation: This administrative regulation is necessary to
specify the supplemental requirements for power boilers and pressure vessels.
(c) How this
administrative regulation conforms to the content of the authorizing statutes: This
regulation directly conforms to KRS 236.030(1), which requires the department
to fix by administrative regulation reasonable standards for the safe
construction, installation, inspection, and repair of boilers, pressure
vessels, and associated pressure piping in this state.
(d) How this
administrative regulation currently assists or will assist in the effective
administration of the statutes: This administrative regulation is necessary to specify the
supplemental requirements for power boiler and pressure
vessel safety.
(2) If this is an
amendment to an existing administrative regulation, provide a brief summary of:
(a) How the
amendment will change this existing administrative regulation: This amendment updates
existing code references to ensure conformity with legislative amendments to KRS 236.040 and other sections of Chapter 236 by 12 RS HB
358 GA, which became effective on July 12, 2012; further defines the elements
of existing formulas required for determining maximum allowable working
pressure (MAWP); and updates citations to
corresponding administrative regulations that are being amended in conjunction
with this amendment.
(b) The necessity
of the amendment to this administrative regulation: This
regulation must be amended to clarify language of existing provisions, and
establish or revise applicable standards required by recent legislative
amendments to KRS Chapter 236.
(c) How the
amendment conforms to the content of the authorizing statutes: KRS 236.030
mandates the Commissioner of the Department of Housing, Buildings and
Construction to fix reasonable standards for the safe construction,
installation, inspection, and repair of boilers, pressure vessels, and pressure
piping.
(d) How the
amendment will assist in the effective administration of the statutes: This
amendment directly effectuates the enabling statutes and allows the department
to establish clear supplemental guidelines specific to power boilers and
pressure vessels.
(3) List the type
and number of individuals, businesses, organizations, or state and local
governments affected by this administrative regulation: All inspectors,
inspecting agencies, installers, repairers, owners, operators, and users of power
boilers and pressure vessels will be affected by the amendments to this
regulation.
(4) Provide an
analysis of how the entities identified in question (3) will be impacted by
either the implementation of this administrative regulation, if new, or by the
change, if it is an amendment, including:
(a) List the
actions that each of the regulated entities identified in question (3) will
have to comply with this administrative regulation or amendment: All
inspectors, inspecting agencies, installers, repairers, owners, operators, and
users of power boilers and pressure vessels will have to review and comply with
the updated provisions.
(b) In complying
with this administrative regulation or amendment, how much will it cost each of
the entities identified in question (3): It is not anticipated that this
amendment will result in any increase in stakeholder costs.
(c) As a result of
compliance, what benefits will accrue to the entities identified in question
(3): Benefits include clarity regarding the required standards for power
boilers and pressure vessels.
(5) Provide an
estimate of how much it will cost to implement this administrative regulation:
(a) Initially: There
are no anticipated additional costs to administer these regulatory amendments.
(b) On a continuing
basis: There are no anticipated additional costs to administer these regulatory
amendments on an ongoing basis.
(6) What is the
source of the funding to be used for the implementation and enforcement of this
administrative regulation: Implementation of these amendments is anticipated to
result in no additional costs to the agency. Any agency costs resulting from
these amendments will be met with existing agency funds.
(7) Provide an
assessment of whether an increase in fees or funding will be necessary to
implement this administrative regulation, if new, or by the change if it is an
amendment: This amendment does not require any increase in fees or funding.
(8) State whether
or not this administrative regulation establishes any fees or directly or
indirectly increases any fees: See answer to question #7 above.
(9) TIERING: Is
tiering applied? Tiering is not applied as all applicable parties will be
subject to the amended requirements.
FISCAL
NOTE ON STATE OR LOCAL GOVERNMENT
1. What units,
parts or divisions of state or local government (including cities, counties,
fire departments, or school districts) will be impacted by this administrative
regulation? The Department of Housing, Buildings and Construction, Division of
Plumbing, Boiler Inspection
Section.
2. Identify each
state or federal statute or federal regulation that requires or authorizes the
action taken by the administrative regulation. This regulation is required and
authorized by KRS 236.030.
3. Estimate the
effect of this administrative regulation on the expenditures and revenues of a
state or local government agency (including cities, counties, fire departments,
or school districts) for the first full year the administrative regulation is
to be in effect.
(a) How much
revenue will this administrative regulation generate for the state or local
government (including cities, counties, fire departments, or school districts)
for the first year? This amendment is not anticipated to result any change in
revenues.
(b) How much
revenue will this administrative regulation generate for the state or local
government (including cities, counties, fire departments, or school districts)
for subsequent years? This amendment is not anticipated to result in any change
in revenues.
(c) How much will
it cost to administer this program for the first year? There are no anticipated
additional costs to administer this regulatory amendment.
(d) How much will
it cost to administer this program for subsequent years? There are no
anticipated additional costs to administer this regulatory amendment.
Note: If specific
dollar estimates cannot be determined, provide a brief narrative to explain the
fiscal impact of the administrative regulation.
Revenues (+/-): Neutral.
Expenditures (+/-):
Neutral.
Other Explanation: Neutral.
