Kan. Admin. Regs. § 49-51-7 - Boiler feeding
(a) Each boiler
shall have a feed supply that will permit it to be fed at any time while under
pressure.
(b) Each boiler having
more than 500 square feet of water-heating surface shall have at least two
suitable means of feeding, at least one of which shall be a feed pump. A source
of feed at a pressure three percent greater than the set pressure of the safety
valve with the highest setting may be considered one of the means. Boilers
fired by gaseous, liquid, or solid fuel in suspension may be equipped with a
single means of feeding water, if means are furnished for the shutoff of heat
input before the water level reaches the lowest safe level.
(c) The feedwater shall be introduced into
the boiler in a manner preventing it from discharge close to riveted joints of
shell or furnace sheets, directly against surfaces exposed to products of
combustion, or to direct radiation from the fire.
(d) The feed piping to the boiler shall be
provided with a check valve near the boiler and a valve or cock between the
check valve and the boiler. When two or more boilers are fed from a common
source, there shall also be a valve on the branch to each boiler between the
check valve and the source of supply. Whenever a globe valve is used on feed
piping, the inlet shall be under the disk of the valve.
(e) In all cases in which returns are fed
back to the boiler by gravity, there shall be a check valve and stop valve in
each return line. The stop valve shall be placed between the boiler and the
check valve. Both shall be located as close to the boiler as is practicable.
(f) If deaerating heaters are not
employed, the temperature of the feedwater shall not be less than 120 degrees
F. to avoid the possibility of setting up localized stress. If deaerating
heaters are employed, the minimum feedwater temperature shall not be less than
215 degrees F. so that dissolved gases may be thoroughly released.
Notes
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