FMEA FOR BOILER Proce rocess ss Step Func unctio tion GAS FIRING
STEA STEAM M EXL EXL!S !SI! I!N N
Potentia ntiall Failur ilure e Mod Mode Gas line leaks Gas line repair High gas pressure Low Low wate waterr le" le"el el 'e(ecti"e sa(et% "al"es 'e(ecti"e stea$ pressure gauges Scaling or corrosion in /oiler0s internal sur(aces#%passe& controls
Potential Efect (s) o Failure Syste Plant Low Efect No Efect Low Efect No Efect Low Efect No Efect Stea$ s%ste$ trip Lower pro&uction Low Efect No Efect Low Efect No Efect
#oil #oiler er shu shut& t&ow own n
Stea Stea$ $ s%st s%ste$ e$ tri trip p
ro& ro&uc ucti tion on sto stoop opin ing g
#oil #oiler er shu shut& t&ow own n
Stea Stea$ $ s%st s%ste$ e$ tri trip p
ro& ro&uc ucti tion on sto stoop opin ing g
#oil #oiler er shu shut& t&ow own n
Stea Stea$ $ s%st s%ste$ e$ tri trip p
ro& ro&uc ucti tion on sto stoop opin ing g
#oil #oiler er shu shut& t&ow own n
Stea Stea$ $ s%st s%ste$ e$ tri trip p
ro& ro&uc ucti tion on sto stoop opin ing g
#oil #oiler er shu shut& t&ow own n
Stea Stea$ $ s%st s%ste$ e$ tri trip p
ro& ro&uc ucti tion on sto stoop opin ing g
Ta$pering Ta$pering with controls oor $aintenance *on&ensate tank e.plosionEXL!SI!N IN F)RNA*E Ina&e+uate pilot,igniterpilot,igniterIML!SI!NS E.cessi"e negati"e pressure
E+uip$ent un&ergoing $aintenanceSu&&en starting o( re$otel% controlle& e+uip$ent- Release o( 1ui& pressureElectrical shockMAINTENAN*E *leaning Entering a con2ne& or enclose& space such as (urnace3 &ucts3 &ru$s3 shell3 gas passes3 1ues3 tanks3 /unkers3 hoppers3 etcAir/orne conta$inants such as gases3 (u$es3 "apours3 &ust an& $istMo"ing e+uip$ent or parts an& (an /la&es in e.pose& con&ition *ongestion in work area Acci&ental opening o( the access &oorELE* ELE*T TRI*A RI*AL L
E.p E.pose ose&, nak nake& el electr ectric ical al wiring ring E.pose& electrical /o.esSwitch /o. opens without turning of powers-
Se!
Criticality Analysis Occur "etect
RP#
FMEA FOR BOILER Process Step Function *heck 4al"e
*o$/ustion roo$
*ontrol
Force& &ra(t (an Air 2lter Furnace Fuel s%ste$ iping s%ste$ Sa(et% "al"e =ater so(tener Fee& water s%ste$
Potential Failure Mode Faile& to open Re$ain open *rack "al"e Incorrect /urner se+uence Too $uch (uel /eing 2re& Too $uch e.cess air Fault% 1a$ &etector *o$/ustion air "er% low 1ow *o$/ustion gas pass (ailure !"er $a.i$u$ per$issi/le working pressure Low water le"el E.tra water le"el ower Failure =ater treat$ent Noise in $otor 'irt on sure(ace
