Download - Boiler Safe Working Practice
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BOILER ROOMBOILER ROOM
As a precaution against funnel againstAs a precaution against funnel againstfunnel fires and sparks, burners, tubes,funnel fires and sparks, burners, tubes,uptakes, exhaust manifolds and sparksuptakes, exhaust manifolds and sparksarresters should be maintained in goodarresters should be maintained in goodworking condition. If there is a funnel fire orworking condition. If there is a funnel fire orsparks are emitted from the funnel, thesparks are emitted from the funnel, thetanker should, if necessary, alter the coursetanker should, if necessary, alter the course
as soon as possible to avoid sparks fallingas soon as possible to avoid sparks fallingand must be stopped and all openingsand must be stopped and all openingsclosedclosed
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BLOWING THE BOILER TUBESBLOWING THE BOILER TUBES
Boiler tubes should not be soot prior toBoiler tubes should not be soot prior to
arrival and after department from a port. Thearrival and after department from a port. The
officer on bridge watch should be consultedofficer on bridge watch should be consulted
prior to the operation commencing and theprior to the operation commencing and the
vessels course altered if necessary. Boilervessels course altered if necessary. Boiler
tubes should not be blown when the vesseltubes should not be blown when the vessel
in port.in port.
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EMERGENCY AND ABNORMALEMERGENCY AND ABNORMAL
RUNNING CONDITIONRUNNING CONDITION
The following are the guidelines for an engineer onThe following are the guidelines for an engineer onduty to respond to emergencyduty to respond to emergency
HIGH WATER LEVEL:HIGH WATER LEVEL:a. check and reduce firing rate.a. check and reduce firing rate.
b. perate blow down systemb. perate blow down system
c. throttle feed check valves.c. throttle feed check valves.
d. If bad water hammer due to carry!over isd. If bad water hammer due to carry!over isexperienced, close steam outlet valve to preventexperienced, close steam outlet valve to prevent
damage to pipeline and machinery.damage to pipeline and machinery.
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Water level below gage gla!!:Water level below
gage gla!!:
a. shut!off burner "if not cut!outa. shut!off burner "if not cut!out
automatically#automatically#b. take the boiler out of load.b. take the boiler out of load.
c. ensure the internal damage due toc. ensure the internal damage due to
overheating.overheating.
d. $o not bring!up the water level in hasted. $o not bring!up the water level in haste
until the boiler parts are cooled down.until the boiler parts are cooled down.
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LARGE LEA":LARGE LEA":
%. &ater level vanishes%. &ater level vanishes'. Bursting noise'. Bursting noise
(. $rop in steam pressure(. $rop in steam pressure
). *lame may be put off by steam.). *lame may be put off by steam.
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EMERGENCY O#ERATION DUEEMERGENCY O#ERATION DUE
TO $IRETO $IRE
*ire can occur in the*ire can occur in the a%r &eater!'a%r &eater!'
e(o)o*%+er!e(o)o*%+er!,, !,er&eater!!,er&eater!andand e-&a!te-&a!t
ga! &eat e-(&a)ger!ga! &eat e-(&a)ger!. These heat. These heat
extracting units are all situated in the path ofextracting units are all situated in the path of
combustion gases and under certaincombustion gases and under certain
conditions, fortunately rare, can experienceconditions, fortunately rare, can experience
disastrous fires. These fires are two typedisastrous fires. These fires are two type
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TWO TY#ES O$ BOILER $IRE:TWO TY#ES O$ BOILER $IRE:
%.+T *I-%.+T *I-
'. /$0-1 *I-'. /$0-1 *I-
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A$2A1TA0-+ andA$2A1TA0-+ and
$I+A$2A1TA0-+ * *ire Tube$I+A$2A1TA0-+ * *ire Tube
BoilerBoiler ADVANTAGES O$ $IRE TUBE BOILERADVANTAGES O$ $IRE TUBE BOILER
%.can use impure water, without serious%.can use impure water, without serious
damage.damage.'. They can contain a large amount of water,'. They can contain a large amount of water,
and do not re3uire exacting supervision asand do not re3uire exacting supervision as
regard to water level. +team pressure isregard to water level. +team pressure issteadier.steadier.
(.Their first cost is relatively low(.Their first cost is relatively low
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). They are accessible to maintenance.). They are accessible to maintenance.
4. Because fire is on the inside of Boiler4. Because fire is on the inside of Boiler
and is surrounded by water and radiationand is surrounded by water and radiationlosses are lower.losses are lower.
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DISADVANTAGES O$ $IRE TUBE BOILERDISADVANTAGES O$ $IRE TUBE BOILER
%. Because they contain large amount of%. Because they contain large amount ofwater, they re3uire a long interval of time towater, they re3uire a long interval of time to
raise a steam and are not flexible asraise a steam and are not flexible as
regards to changes of steam demand.regards to changes of steam demand. '. They are more susceptible to explosion'. They are more susceptible to explosion
and in such a case, the large volume ofand in such a case, the large volume of
escaping water flashing into steam uoponescaping water flashing into steam uoponreaching the atmosphere might causereaching the atmosphere might cause
serious damage to personnel.serious damage to personnel.
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(. igh steam pressure would re3uire(. igh steam pressure would re3uire
extremely thick Boiler plate, and thus the fireextremely thick Boiler plate, and thus the fire
tube Boiler are not usually capable oftube Boiler are not usually capable ofproducing steam at high pressure andproducing steam at high pressure and
temperature.temperature.
). Typically efficiency is less than that of). Typically efficiency is less than that ofwater tube Boiler.water tube Boiler.