FDNY COF P-98 QUESTIONS AND
ANSWERS
Combustible86Waste86-86answer--
Any86substance,86item86or86other86organic86or86inorganic86matter86that86presents86a86fir
e86hazard86and86is86a86byproduct86or86residue86of86the86construction,86use86or86occupan
cy86of86any86premises,86or86any86activity86conducted86thereon,86that86has86no86economi
c86value86in86connection86with86such86use86or86occupancy.
Compressed86Gas86-86answer--
A86material,86or86mixture86of86materials86that86is86a86gas86at8668F86or86less86at8614.786p
sia86of86pressure;86and86has86a86boiling86point86of8668F86or86less86at8614.786psia86that86i
s86either86liquefied,86non-
liquefied86or86in86solution86at86that86temperature86and86pressure,86except86gases86which
86have86no86other86health-or86physical-
hazard86properties86that86are86not86considered86to86be86compressed86until86the86pressu
re86in86the86packaging86exceeds864186psia86at8668F
Compressed86Gas86Container86-86answer--
A86pressure86container86designed86to86hold86compressed86gases86at86pressures86great
er86than86186atmosphere86at8668F.86A86compressed86gas86container86is86a86container86t
hat86stores86highly86pressurized86gas.
Compressed86Gas86System86-86answer--
An86assembly86of86components,86such86as86containers,86reactors,86pumps,86compresso
rs86and86connecting86piping86and86tubing,86designed86to86contain,86distribute86or86transp
ort86compressed86gases.
Containment86system86-86answer--A86gas-
tight86recovery86system86comprised86of86devices86or86equipment86which,86when86placed
86over86or86around86the86portion86of86the86compressed86gas86container86that86is86leakin
g,86stops86or86controls86the86escape86of86gas86from86the86container
, Containment86vessel86-86answer--A86gas-
tight86vessel86which,86when86installed86or86placed86over86or86around86a86leaking86compr
essed86gas86container,86confines86the86container86and86the86gas86leaking86there86from.
DOTn86-86answer--
United86States86Department86of86Transportation,86n=US86regulations,86not86Canadian
Explosion86-86answer--
An86effect86produced86by86the86sudden86violent86expansion86of86gases,86whether86or86n
ot86accompanied86by86a86shock86wave86or86disruption,86of86enclosing86materials
Excess86Flow86Valve86-86answer--
A86valve86inserted86into86a86compressed86gas86container86that86is86designed86to86shut86
off86the86flow86of86gas86in86the86event86that86its86predetermined86flow86is86exceeded
Excess86Flow86Control86-86answer--A86fail-
safe86system86or86other86approved86device,86equipment86or86system86designed86to86shu
t86off86flow86caused86by86a86rupture86in86a86pressurized86piping86system.
Exhausted86Enclosure86-86answer--
A86device,86typically86consisting86of86a86hood86equipped86with86a86fan86that86serves86to8
6capture86and86exhaust86fumes,86mist,86vapors86and86gases86generated86at86a86worksta
tion86or86other86local86environment.86An86exhausted86enclosure86does86not86include86a86
room86provided86with86general86ventilation
Gas86Room86-86answer--
A86separately86ventilated,86fully86enclosed86room86in86which86only86compressed86gases8
6and86associated86equipment86and86supplies86are86stored86or86used.
Manifold86-86answer--
Multiple86tanks86that86are86connected86together86to86operate86as86one86system
Nesting86-86answer--A86method86of86securing86flat-
bottomed86compressed86gas86containers86upright86in86a86tight86mass86using86a86contigu
ous86three-
point86contact86system86whereby86all86containers86within86a86group86have86a86minimum8
6of86three86points86of86contact86with86other86containers,86walls86or86bracing.
Oxidizing86Gas86-86answer--
A86gas86that86car86support86and86accelerate86combustion86of86other86materials.
What86is86compressed86flammable86gas?86-86answer--
It86is86any86gas86that86is86ignitable86in86a86mixture86of8613%86or86less86(by86volume)86wit
h86air,86or86the86flammable86range86with86air86is86at86least8612%,86regardless86of86the86l
ower86limit,86at86atmospheric86temperature86and86pressure.
ANSWERS
Combustible86Waste86-86answer--
Any86substance,86item86or86other86organic86or86inorganic86matter86that86presents86a86fir
e86hazard86and86is86a86byproduct86or86residue86of86the86construction,86use86or86occupan
cy86of86any86premises,86or86any86activity86conducted86thereon,86that86has86no86economi
c86value86in86connection86with86such86use86or86occupancy.
Compressed86Gas86-86answer--
A86material,86or86mixture86of86materials86that86is86a86gas86at8668F86or86less86at8614.786p
sia86of86pressure;86and86has86a86boiling86point86of8668F86or86less86at8614.786psia86that86i
s86either86liquefied,86non-
liquefied86or86in86solution86at86that86temperature86and86pressure,86except86gases86which
86have86no86other86health-or86physical-
hazard86properties86that86are86not86considered86to86be86compressed86until86the86pressu
re86in86the86packaging86exceeds864186psia86at8668F
Compressed86Gas86Container86-86answer--
A86pressure86container86designed86to86hold86compressed86gases86at86pressures86great
er86than86186atmosphere86at8668F.86A86compressed86gas86container86is86a86container86t
hat86stores86highly86pressurized86gas.
Compressed86Gas86System86-86answer--
An86assembly86of86components,86such86as86containers,86reactors,86pumps,86compresso
rs86and86connecting86piping86and86tubing,86designed86to86contain,86distribute86or86transp
ort86compressed86gases.
Containment86system86-86answer--A86gas-
tight86recovery86system86comprised86of86devices86or86equipment86which,86when86placed
86over86or86around86the86portion86of86the86compressed86gas86container86that86is86leakin
g,86stops86or86controls86the86escape86of86gas86from86the86container
, Containment86vessel86-86answer--A86gas-
tight86vessel86which,86when86installed86or86placed86over86or86around86a86leaking86compr
essed86gas86container,86confines86the86container86and86the86gas86leaking86there86from.
DOTn86-86answer--
United86States86Department86of86Transportation,86n=US86regulations,86not86Canadian
Explosion86-86answer--
An86effect86produced86by86the86sudden86violent86expansion86of86gases,86whether86or86n
ot86accompanied86by86a86shock86wave86or86disruption,86of86enclosing86materials
Excess86Flow86Valve86-86answer--
A86valve86inserted86into86a86compressed86gas86container86that86is86designed86to86shut86
off86the86flow86of86gas86in86the86event86that86its86predetermined86flow86is86exceeded
Excess86Flow86Control86-86answer--A86fail-
safe86system86or86other86approved86device,86equipment86or86system86designed86to86shu
t86off86flow86caused86by86a86rupture86in86a86pressurized86piping86system.
Exhausted86Enclosure86-86answer--
A86device,86typically86consisting86of86a86hood86equipped86with86a86fan86that86serves86to8
6capture86and86exhaust86fumes,86mist,86vapors86and86gases86generated86at86a86worksta
tion86or86other86local86environment.86An86exhausted86enclosure86does86not86include86a86
room86provided86with86general86ventilation
Gas86Room86-86answer--
A86separately86ventilated,86fully86enclosed86room86in86which86only86compressed86gases8
6and86associated86equipment86and86supplies86are86stored86or86used.
Manifold86-86answer--
Multiple86tanks86that86are86connected86together86to86operate86as86one86system
Nesting86-86answer--A86method86of86securing86flat-
bottomed86compressed86gas86containers86upright86in86a86tight86mass86using86a86contigu
ous86three-
point86contact86system86whereby86all86containers86within86a86group86have86a86minimum8
6of86three86points86of86contact86with86other86containers,86walls86or86bracing.
Oxidizing86Gas86-86answer--
A86gas86that86car86support86and86accelerate86combustion86of86other86materials.
What86is86compressed86flammable86gas?86-86answer--
It86is86any86gas86that86is86ignitable86in86a86mixture86of8613%86or86less86(by86volume)86wit
h86air,86or86the86flammable86range86with86air86is86at86least8612%,86regardless86of86the86l
ower86limit,86at86atmospheric86temperature86and86pressure.
