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Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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SUPERHEATING OF STEAM (steam separating arrangements in boilers F22B 37/26)
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Steam superheating characterised by heating method (exothermal chemical reactions not involving a supply of free oxygen gas, apparatus or devices for using the heat therefrom F24J)
F22G 1/005
.
{
the heat being supplied by steam
}
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F22G 1/02
.
with heat supply by hot flue gases from the furnace of the steam boiler
F22G 1/04
. .
by diverting flow or hot flue gases to separate superheaters operating in reheating cycle, e.g. for reheating steam between a high-pressure turbine stage and an intermediate turbine stage
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F22G 1/06
.
with heat supply predominantly by radiation
F22G 1/08
. .
from heated brickwork or the like
F22G 1/10
.
with provision for superheating by throttling
F22G 1/12
.
by mixing steam with furnace gases or other combustion products
F22G 1/14
.
using heat generated by chemical reactions
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F22G 1/16
.
by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil
F22G 1/165
. .
{
by electricity (steam generation in boilers heated electrically, in general, F22B 1/28)
}
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Steam superheaters characterised by constructional features; Details of component parts thereof (general aspects of enclosed heat-exchangers F28D)
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F22G 3/001
.
{
Steam tube arrangements not dependent of location (characterised by location F22G 7/00)
}
F22G 3/002
. .
{
with helical steam tubes
}
F22G 3/003
.
{
Superheater drain arrangements
}
F22G 3/004
.
{
Steam tubes with steam flowing in opposite directions in one pipe, e.g. Field tubes (F22G 3/005 takes precedence)
}
F22G 3/005
.
{
Annular steam tubes, i.e. the steam being heated between concentric tubes with the heating fluid flowing in inner and around outer tube
}
F22G 3/006
.
{
Steam superheaters with heating tubes (F22G 3/005 takes precedence)
}
F22G 3/007
.
{
Headers; Collectors, e.g. for mixing
}
F22G 3/008
.
{
Protection of superheater elements, e.g. cooling superheater tubes during starting-up periods, water tube screens
}
F22G 3/009
.
{
Connecting or sealing of superheater or reheater tubes with collectors or distributors
}
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Controlling superheat temperature (control systems for steam boilers F22B; regulating or controlling in general G05)
F22G 5/02
.
Applications of combustion-control devices, e.g. tangetial-firing burners, tilting burners
F22G 5/04
.
by regulating flue gas flow, e.g. by proportioning or diverting
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F22G 5/06
.
by recirculating flue gases
F22G 5/08
. .
preventing furnace gas backflow through recirculating fan
F22G 5/10
.
by displacing superheater sections
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F22G 5/12
.
by attemperating the superheated steam, e.g. by injected water sprays (spray mixers B01F 5/18)
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F22G 5/123
. .
{
Water injection apparatus
}
F22G 5/126
. . .
{
in combination with steam-pressure reducing valves
}
F22G 5/14
. .
by live steam
F22G 5/16
.
by indirectly cooling or heating the superheated steam in auxiliary enclosed heat-exchanger
F22G 5/18
.
by by-passing steam around superheater sections
F22G 5/20
.
by combined controlling procedures
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Steam superheaters characterised by location, arrangement, or disposition
F22G 7/005
.
{
for locomotive boilers (F22G 7/065, F22G 7/105 take precedence)
}
F22G 7/02
.
in fire tubes
F22G 7/04
.
in jackets around fire tubes
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F22G 7/06
.
in furnace tubes
F22G 7/065
. .
{
for locomotive boilers
}
F22G 7/08
.
in fire-boxes
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F22G 7/10
.
in smoke-boxes
F22G 7/105
. .
{
for locomotive boilers
}
F22G 7/12
.
in flues
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F22G 7/14
.
in water-tube boilers, e.g. between banks of water tubes
F22G 7/145
. .
{
of inclined type, i.e. the water-tube sets being inclined with respect to the horizontal plane
}
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Last Modified: 10/10/2013