F22G1/00	7	Steam superheating characterised by heating method	F22G1/00	F22G1/00		504
F22G1/005	8	{the heat being supplied by steam}	F22G1/00	F22G1/00		182
F22G1/02	8	with heat supply by hot flue gases from the furnace of the steam boiler	F22G1/02	F22G1/02		239
F22G1/04	9	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	F22G1/04	F22G1/04		70
F22G1/06	8	with heat supply predominantly by radiation	F22G1/06	F22G1/06		231
F22G1/08	9	from heated brickwork or the like	F22G1/08	F22G1/08		2
F22G1/10	8	with provision for superheating by throttling	F22G1/10	F22G1/10		23
F22G1/12	8	by mixing steam with furnace gases or other combustion products	F22G1/12	F22G1/12		31
F22G1/14	8	using heat generated by chemical reactions	F22G1/14	F22G1/14		45
F22G1/16	8	by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil	F22G1/16	F22G1/16		477
F22G1/165	9	{by electricity}	F22G1/16	F22G1/16		169
F22G3/00	7	Steam superheaters characterised by constructional features; Details or component parts thereof	F22G3/00	F22G3/00		436
F22G3/001	8	{Steam tube arrangements not dependent of location}	F22G3/00	F22G3/00		54
F22G3/002	9	{with helical steam tubes}	F22G3/00	F22G3/00		33
F22G3/003	8	{Superheater drain arrangements}	F22G3/00	F22G3/00		19
F22G3/004	8	{Steam tubes with steam flowing in opposite directions in one pipe, e.g. Field tubes (F22G3/005 takes precedence)}	F22G3/00	F22G3/00		37
F22G3/005	8	{Annular steam tubes, i.e. the steam being heated between concentric tubes with the heating fluid flowing in inner and around outer tube}	F22G3/00	F22G3/00		17
F22G3/006	8	{Steam superheaters with heating tubes (F22G3/005 takes precedence)}	F22G3/00	F22G3/00		46
F22G3/007	8	{Headers; Collectors, e.g. for mixing}	F22G3/00	F22G3/00		81
F22G3/008	8	{Protection of superheater elements, e.g. cooling superheater tubes during starting-up periods, water tube screens}	F22G3/00	F22G3/00		137
F22G3/009	8	{Connecting or sealing of superheater or reheater tubes with collectors or distributors}	F22G3/00	F22G3/00		379
F22G5/00	7	Controlling superheat temperature	F22G5/00	F22G5/00		245
F22G5/02	8	Applications of combustion-control devices, e.g. tangential-firing burners, tilting burners	F22G5/02	F22G5/02		370
F22G5/04	8	by regulating flue gas flow, e.g. by proportioning or diverting	F22G5/04	F22G5/04		374
F22G5/06	8	by recirculating flue gases	F22G5/06	F22G5/06		168
F22G5/08	9	preventing furnace gas backflow through recirculating fan	F22G5/08	F22G5/08		4
F22G5/10	8	by displacing superheater sections	F22G5/10	F22G5/10		51
F22G5/12	8	by attemperating the superheated steam, e.g. by injected water sprays	F22G5/12	F22G5/12		658
F22G5/123	9	{Water injection apparatus}	F22G5/12	F22G5/12		377
F22G5/126	10	{in combination with steam-pressure reducing valves}	F22G5/12	F22G5/12		169
F22G5/14	9	by live steam	F22G5/14	F22G5/14		29
F22G5/16	8	by indirectly cooling or heating the superheated steam in auxiliary enclosed heat-exchanger	F22G5/16	F22G5/16		238
F22G5/18	8	by by-passing steam around superheater sections	F22G5/18	F22G5/18		26
F22G5/20	8	by combined controlling procedures	F22G5/20	F22G5/20		373
F22G7/00	7	Steam superheaters characterised by location, arrangement, or disposition	F22G7/00	F22G7/00		155
F22G7/005	8	{for locomotive boilers (F22G7/065, F22G7/105 take precedence)}	F22G7/00	F22G7/00		118
F22G7/02	8	in fire tubes	F22G7/02	F22G7/02		120
F22G7/04	8	in jackets around fire tubes	F22G7/04	F22G7/04		3
F22G7/06	8	in furnace tubes	F22G7/06	F22G7/06		55
F22G7/065	9	{for locomotive boilers}	F22G7/06	F22G7/06		571
F22G7/08	8	in fire-boxes	F22G7/08	F22G7/08		45
F22G7/10	8	in smoke-boxes	F22G7/10	F22G7/10		87
F22G7/105	9	{for locomotive boilers}	F22G7/10	F22G7/10		126
F22G7/12	8	in flues	F22G7/12	F22G7/12		172
F22G7/14	8	in water-tube boilers, e.g. between banks of water tubes	F22G7/14	F22G7/14		821
F22G7/145	9	{of inclined type, i.e. the water-tube sets being inclined with respect to the horizontal plane}	F22G7/14	F22G7/14		200
