Current through Register Vol. 39, No. 6, September 16, 2024
(a) The
owner or user shall prepare a high pressure boiler, including locomotive, hobby
and exhibition boilers, for internal inspection by:
(1) cooling the boiler, furnace, and setting
so as to prevent damage to any part;
(2) draining and washing internal parts to be
inspected, including disassembly and cleaning of float bowl type low-water fuel
cutoff devices and associated piping plugs or caps;
(3) removing wash-out, drain, and inspection
plugs;
(4) removing enough of the
grates in an internally fired boiler to permit inspection;
(5) removing soot, ashes and unburned solid
fuel plus enough brickwork, refractory, and insulation to permit
inspection;
(6) removing manhole
and handhole plates;
(7) preparing
the controls and safety devices for inspection and testing;
(8) preventing leakage of water, steam, or
vapors into boiler interiors that would endanger personnel;
(9) providing adequate ventilation to prevent
the accumulation of hazardous gasses; and
(10) providing, when requested by the
inspector, a competent person, as defined under the North Carolina Occupational
Safety & Health standard for confined spaces, to assist the inspector in
the performance of his inspection.
(b) In addition to the requirements in
Paragraph (a) of this Rule, the owner or user shall prepare a high pressure
boiler that has a manhole and which is connected to a common header with
another boiler for internal inspection by:
(1)
closing and tagging, or padlocking, the steam stop valves and opening all drain
valves or cocks located between the steam stop valves;
(2) closing and tagging, or padlocking, the
feed and check valves and opening all drain valves or cocks located between the
feed and check valves;
(3) draining
boiler and then closing and padlocking the blowoff valves;
(4) disconnecting, at the request of the
inspector, blowoff lines between pressure parts and valves;
(5) opening all drains and vent
lines;
(6) closing and tagging or
padlocking all fuel valves, blower or fan motors and any other devices that may
deliver energy in any form to the boiler; and
(7) after complying with all other provisions
of this Rule, removing the manhole covers.
(c) The owner or user need not make any
special preparation for an external inspection of a boiler or pressure vessel,
except that if the inspector requires the boiler or pressure vessel to be shut
down for a closer inspection, the boiler or pressure vessel shall be prepared
as is required for the internal inspection of a high pressure boiler.
Authority
G.S.
95-69.11;
Eff. May 29,
1981;
Amended Eff. July 1, 2011; July 1, 2006; January 1,
1995;
Pursuant to
G.S.
150B-21.3A, rule is necessary without
substantive public interest Eff. July 22,
2018.
