Flu-gas temperatures should be at how many
degrees above steam production temperature
during boiler operations?
When securing a boiler, at what pressure should
you open the drum vent valves?
What is the purpose of a boiler operating log?
Learning Objective: Understand the relationship of
safety in operating and maintaining boilers. Recognize
the different types and use of lockout devices in boiler
In servicing boilers, the need for SAFETY cannot
be overemphasized. Much progress has been made
over the years in the development of safety devices for
boilers. There are still many ways, however, in which
serious accidents can happen around boilers. A boiler
operator or serviceman who is careless on the job
threatens the safety of everyone. Accidents somehow
have a way of happening at a moment we least expect.
All the more reason, therefore, for constant alertness
and close attention to detail. Do not take chances! BE
Some of the major safety precautions to be
observed by Utilitiesmen engaged in boiler operation
and servicing are presented below.
As protection against toxic or explosive gases,
boiler settings must be ventilated completely and
tested for toxic or explosive gases before crews are
permitted to enter.
The covers of manholes must be removed for
ventilation before people enter the drum.
Before anyone enters a steam drum, mud drum, or
other waterside enclosure, steam and feed lines
connected to the headers under pressure should be
isolated by a stop valve and a blank with an open
telltale valve in between, or by two stop valves with a
telltale valve opened in between.
A ventilating fan should be operating in the drum
when someone is working in the boiler.
Workers should not be inside the waterside of the
boiler when pressure is being applied to test a valve
that has not been under pressure.
Workers should wear protective clothing when
making boiler water tests.
Boiler settings must be examined daily for external
air leaks. Cracks, blisters, or other dangerous
conditions in joints, tubes, seams, or blowoff
connections are to be reported to your senior chief
petty officer immediately.
Boilers should also be examined regularly for
deposits on their heating surfaces and for grease or
other foreign matter in the water. Boilers showing any
such faults should be cleared at the first opportunity
and should not be used until cleared.
Performing certain adjustments and repairs while
pressure is up is prohibited. A complete absence of
pressure is to be ensured by opening the air cock or test
and water gauge cocks connecting with the steam space
before fittings or parts subject to pressure are removed or
tightened, and before manhole or handhole plate fittings
are loosened on a boiler that has been under pressure.
large warning sign, such as Caution-Man Working
Inside, should be placed near the furnace entrance.
The use of open-flame lights is prohibited in
boilers. When cleaning where flammable vapors and
gases may be present, workers are to use only
explosionproof portable lamps equipped with heavily
insulated three-wire conductors, with one conductor
connecting the guard to ground.
Safety-toed shoes or toe guards must be worn to
prevent injuries from falling slag.
When someone is working inside the furnace, a
a respirator must be worn.
When a worker is chopping slag inside a furnace,
Hard hats and goggles must be worn.
When cleaning operations are performed, workers
should wear the proper personal protective equipment.
The following requirements apply:
Combustion control, feed control, and burner,
stoker, or similar adjustments are permitted with the
boiler steaming, since many adjustments can be made
only when pressure is up.
Oil accumulated on furnace bottoms should be
cleaned out immediately.
The fuel-oil suction and discharge strainers
should be cleaned at least every 8 hours and more
frequently if necessary.
Condensate pits in boiler rooms should have
metal covers. If the pits must be opened for
maintenance, adequate guards should be placed around
them and warning signs posted.