108926: NS.M07.5741 WE: PREVENT
ACCIDENTAL IGNITION AND
RECOGNIZE AND REACT TO
GENERIC ABNORMAL OPERATING
CONDITIONS
Types,of,AOCs,-,ans-✔✔Any,unplanned,or,uncontrolled,escape,of,gas,,fire,,or,explosion,
(above,or,underground)
any,pressure,of,a,gas,system,that,exceeds,the,operating,limits,-,ans-
✔✔a,relief,valve,expelling,gas,or,telemetry,pressure,readings,,etc.
any,pressure,that,falls,below,normal,operating,requirements,-,ans-
✔✔a,pilot,out,at,a,customer,appliance,,or,telemetry,reads,are,significantly,lower,than,norm
al,,etc.
Pipeline,that,has,NO,pressure,that,was,last,known,to,be,in,service,,as,indicated,by,the,follo
wing:,-,ans-✔✔Inadvertent,shutdown.,valve,closed,
(when,it,should,be,open).,Broken,line.,Excess,flow,valve,
(EFV),activated.,Pressure,limiting,device,activated,,etc.
pipeline,facility,installation,that,no,longer,meets,code,requirements,or,company,policy,-,an
s-✔✔bent,riser/other,aboveground,piping,,pipe/
coating,nicked,or,gouged,during,excavation,,grease,stem,on,valve,broken,or,damaged,,in
adequate,support,or,excessive,bending,or,loading,on,facilities,,valve,stuck,and,unable,to,t
urn,,regulator,or,meter,failure,,regulator,vent,too,close,to,a,source,of,ignition,,air,intake,,op
ening,to,a,building,,or,unsafe,electrical,source,,underground,pipeline,exposed,
(when,should,be,buried),,meter/riser,enclosed,or,in,an,unventilated,space.
natural,gas,is,a,naturally,occurring,hydrocarbon,gas,mixture,that,consists,of,-,ans-
✔✔methane,but,includes,varying,amounts,of,other,higher,alkanes,,and,sometimes,a,small
,percentage,of,carbon,dioxide,,nitrogen,,hydrogen,sulfide,,or,helium.
, characteristics,-,ans-✔✔natural,gas,is,non-
toxic,,colorless,,odorless,,and,tasteless,,small,amounts,can,be,breathed,without,ill,effects,,
hazardous,because,it,displaces,oxygen,,one,spark,can,ignite,natural,gas
ignition,temperature,of,natural,gas,,assuming,perfect,combustion,conditions,is,-,ans-
✔✔about,1,100-1,200,degrees,Fahrenheit
"lean",gas,to,air,mixture,-,ans-✔✔below,the,lower,explosive,limit,
(LEL),there,is,not,enough,gas,to,ignite,,even,if,an,ignition,source,is,present.
"rich",gas,to,air,mixture,-,ans-✔✔above,the,upper,explosive,limit,
(UEL),there,is,too,much,gas,to,ignite,,even,if,ignition,source,is,present.
source,of,ignition,can,be,-,ans-✔✔cell,phone,,doorbell,,even,static,electricity.
LEL,-,ans-✔✔5%,natural,gas(4%,indiana)
UEL,-,ans-✔✔15%,natural,gas,(14%,indiana)
most,ideal,gas-to-air,combustion,mixture,ratio,-,ans-✔✔10%
gas,concentration,of,1/5,(20%),of,the,LEL,can,be,detected/smelt,by,-,ans-✔✔an,odorant
mercaptan,is,-,ans-
✔✔a,chemical,containing,sulfur,that,produces,a,rotten,egg,or,garlicky,odor.
all,leaks,are,classified,as,grade,-,ans-✔✔1,,2,,2+,,3
all,leaks,means,leaks,found,on...,-,ans-
✔✔jurisdictional,facilities,,including,mains,,company,service,lines,,customer,service,lines,,
and,customer,meter,settings.
factors,that,affect,the,classification,of,leaks:,-,ans-
✔✔location,,ignition,sources,,surface,conditions,,volume,or,how,much,gas
location,-,ans-
✔✔the,location,of,the,leak,with,respect,to,surrounding,structures,and,enclosures,such,as,b
asements,,electrical,and,telephone,conduits,,manholes,,and,sewer,pipes.
ignition,sources,-,ans-
✔✔the,number,of,possible,sources,of,ignition,such,as,open,flames,,gasoline,engines,,elec
tric,engines,,and,static,electricity.
surface,contitions,-,ans-
✔✔surface,and,frost,conditions,that,could,create,the,possibility,of,gas,migrating,to,other,ar
eas.
ACCIDENTAL IGNITION AND
RECOGNIZE AND REACT TO
GENERIC ABNORMAL OPERATING
CONDITIONS
Types,of,AOCs,-,ans-✔✔Any,unplanned,or,uncontrolled,escape,of,gas,,fire,,or,explosion,
(above,or,underground)
any,pressure,of,a,gas,system,that,exceeds,the,operating,limits,-,ans-
✔✔a,relief,valve,expelling,gas,or,telemetry,pressure,readings,,etc.
any,pressure,that,falls,below,normal,operating,requirements,-,ans-
✔✔a,pilot,out,at,a,customer,appliance,,or,telemetry,reads,are,significantly,lower,than,norm
al,,etc.
Pipeline,that,has,NO,pressure,that,was,last,known,to,be,in,service,,as,indicated,by,the,follo
wing:,-,ans-✔✔Inadvertent,shutdown.,valve,closed,
(when,it,should,be,open).,Broken,line.,Excess,flow,valve,
(EFV),activated.,Pressure,limiting,device,activated,,etc.
pipeline,facility,installation,that,no,longer,meets,code,requirements,or,company,policy,-,an
s-✔✔bent,riser/other,aboveground,piping,,pipe/
coating,nicked,or,gouged,during,excavation,,grease,stem,on,valve,broken,or,damaged,,in
adequate,support,or,excessive,bending,or,loading,on,facilities,,valve,stuck,and,unable,to,t
urn,,regulator,or,meter,failure,,regulator,vent,too,close,to,a,source,of,ignition,,air,intake,,op
ening,to,a,building,,or,unsafe,electrical,source,,underground,pipeline,exposed,
(when,should,be,buried),,meter/riser,enclosed,or,in,an,unventilated,space.
natural,gas,is,a,naturally,occurring,hydrocarbon,gas,mixture,that,consists,of,-,ans-
✔✔methane,but,includes,varying,amounts,of,other,higher,alkanes,,and,sometimes,a,small
,percentage,of,carbon,dioxide,,nitrogen,,hydrogen,sulfide,,or,helium.
, characteristics,-,ans-✔✔natural,gas,is,non-
toxic,,colorless,,odorless,,and,tasteless,,small,amounts,can,be,breathed,without,ill,effects,,
hazardous,because,it,displaces,oxygen,,one,spark,can,ignite,natural,gas
ignition,temperature,of,natural,gas,,assuming,perfect,combustion,conditions,is,-,ans-
✔✔about,1,100-1,200,degrees,Fahrenheit
"lean",gas,to,air,mixture,-,ans-✔✔below,the,lower,explosive,limit,
(LEL),there,is,not,enough,gas,to,ignite,,even,if,an,ignition,source,is,present.
"rich",gas,to,air,mixture,-,ans-✔✔above,the,upper,explosive,limit,
(UEL),there,is,too,much,gas,to,ignite,,even,if,ignition,source,is,present.
source,of,ignition,can,be,-,ans-✔✔cell,phone,,doorbell,,even,static,electricity.
LEL,-,ans-✔✔5%,natural,gas(4%,indiana)
UEL,-,ans-✔✔15%,natural,gas,(14%,indiana)
most,ideal,gas-to-air,combustion,mixture,ratio,-,ans-✔✔10%
gas,concentration,of,1/5,(20%),of,the,LEL,can,be,detected/smelt,by,-,ans-✔✔an,odorant
mercaptan,is,-,ans-
✔✔a,chemical,containing,sulfur,that,produces,a,rotten,egg,or,garlicky,odor.
all,leaks,are,classified,as,grade,-,ans-✔✔1,,2,,2+,,3
all,leaks,means,leaks,found,on...,-,ans-
✔✔jurisdictional,facilities,,including,mains,,company,service,lines,,customer,service,lines,,
and,customer,meter,settings.
factors,that,affect,the,classification,of,leaks:,-,ans-
✔✔location,,ignition,sources,,surface,conditions,,volume,or,how,much,gas
location,-,ans-
✔✔the,location,of,the,leak,with,respect,to,surrounding,structures,and,enclosures,such,as,b
asements,,electrical,and,telephone,conduits,,manholes,,and,sewer,pipes.
ignition,sources,-,ans-
✔✔the,number,of,possible,sources,of,ignition,such,as,open,flames,,gasoline,engines,,elec
tric,engines,,and,static,electricity.
surface,contitions,-,ans-
✔✔surface,and,frost,conditions,that,could,create,the,possibility,of,gas,migrating,to,other,ar
eas.
