Kan. Admin. Regs. § 49-50-22 - Venting of atmospheric vents, gas vents, or bleed or relief lines
(a) Each gas
pressure regulator, pressure switch, safety shutoff valve, and any other gas
control that has a threaded fitting shall be vented to the outdoors to a safe
point of discharge. The material for each vent line shall be metallic, in
accordance with the standards in NFPA 54, which is adopted in K.A.R. 49-50-2.
(b) The atmospheric vent lines
shall not be connected to any common gas vent, to any threaded gas vent, or to
any bleed or relief line on any double-block-and-bleed fuel train. Each boiler
shall be vented separately.
(c)
Each atmospheric vent line that has a threaded connection shall be manifolded
together in a common atmospheric vent line having a cross-sectional area that
is not less than the area of the largest vent line plus 50% of the total areas
of the additional vent lines.
(d)
Each gas regulator and each pressure interlock switch, as well as any other
fuel train component that requires atmospheric pressure to balance diaphragms
or other similar devices, shall be provided with a pipe-threaded connection for
its vent line. The vent line shall be extended outdoors to a safe point of
discharge. A means shall be provided at the vent line's terminating point to
prevent blockage of the line by foreign material, moisture, or insects.
(e) Each vent line and actuating
line inside boiler casings shall be made of metallic material.
Notes
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No prior version found.