1. CPC Sections
  2. CPC Section F
  3. CPC Class F22
  4. CPC Subclass F22G
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CPC
COOPERATIVE PATENT CLASSIFICATION
F22G
SUPERHEATING OF STEAM [2025-01]
F22G 1/00
Steam superheating characterised by heating method [2025-01]
F22G 1/005
.
{the heat being supplied by steam} [2013-01]
F22G 1/02
.
with heat supply by hot flue gases from the furnace of the steam boiler [2013-01]
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 [2013-01]
F22G 1/06
.
with heat supply predominantly by radiation [2013-01]
F22G 1/08
. .
from heated brickwork or the like [2013-01]
F22G 1/10
.
with provision for superheating by throttling [2013-01]
F22G 1/12
.
by mixing steam with furnace gases or other combustion products [2013-01]
F22G 1/14
.
using heat generated by chemical reactions [2013-01]
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 [2013-01]
F22G 1/165
. .
{by electricity} [2025-01]
F22G 3/00
Steam superheaters characterised by constructional features; Details or component parts thereof [2025-01]
F22G 3/001
.
{Steam tube arrangements not dependent of location} [2025-01]
F22G 3/002
. .
{with helical steam tubes} [2013-01]
F22G 3/003
.
{Superheater drain arrangements} [2013-01]
F22G 3/004
.
{Steam tubes with steam flowing in opposite directions in one pipe, e.g. Field tubes (F22G 3/005 takes precedence)} [2013-01]
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} [2013-01]
F22G 3/006
.
{Steam superheaters with heating tubes (F22G 3/005 takes precedence)} [2013-01]
F22G 3/007
.
{Headers; Collectors, e.g. for mixing} [2013-01]
F22G 3/008
.
{Protection of superheater elements, e.g. cooling superheater tubes during starting-up periods, water tube screens} [2013-01]
F22G 3/009
.
{Connecting or sealing of superheater or reheater tubes with collectors or distributors} [2013-01]
F22G 5/00
Controlling superheat temperature [2025-01]
F22G 5/02
.
Applications of combustion-control devices, e.g. tangential-firing burners, tilting burners [2017-05]
F22G 5/04
.
by regulating flue gas flow, e.g. by proportioning or diverting [2013-01]
F22G 5/06
.
by recirculating flue gases [2013-01]
F22G 5/08
. .
preventing furnace gas backflow through recirculating fan [2013-01]
F22G 5/10
.
by displacing superheater sections [2013-01]
F22G 5/12
.
by attemperating the superheated steam, e.g. by injected water sprays [2025-01]
F22G 5/123
. .
{Water injection apparatus} [2013-01]
F22G 5/126
. . .
{in combination with steam-pressure reducing valves} [2013-01]
F22G 5/14
. .
by live steam [2013-01]
F22G 5/16
.
by indirectly cooling or heating the superheated steam in auxiliary enclosed heat-exchanger [2013-01]
F22G 5/18
.
by by-passing steam around superheater sections [2013-01]
F22G 5/20
.
by combined controlling procedures [2013-01]
F22G 7/00
Steam superheaters characterised by location, arrangement, or disposition [2013-01]
F22G 7/005
.
{for locomotive boilers (F22G 7/065, F22G 7/105 take precedence)} [2013-01]
F22G 7/02
.
in fire tubes [2013-01]
F22G 7/04
.
in jackets around fire tubes [2013-01]
F22G 7/06
.
in furnace tubes [2013-01]
F22G 7/065
. .
{for locomotive boilers} [2013-01]
F22G 7/08
.
in fire-boxes [2013-01]
F22G 7/10
.
in smoke-boxes [2013-01]
F22G 7/105
. .
{for locomotive boilers} [2013-01]
F22G 7/12
.
in flues [2013-01]
F22G 7/14
.
in water-tube boilers, e.g. between banks of water tubes [2013-01]
F22G 7/145
. .
{of inclined type, i.e. the water-tube sets being inclined with respect to the horizontal plane} [2013-01]