Steam Turbine Code Types
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GEK 103567J Revised November 2003
GE Power Systems
Code Designation Book for Steam Turbines
These instructions do not purport to cover all details or variations in equipment nor to provide for every possible contingency to be met in connection with installation, operation or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes the matter should be referred to the GE Company. © 2002 GENERAL ELECTRIC COMPANY
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Code Designation Book for Steam Turbines
Code Designation Book for Steam Turbines
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I. CODE DESIGNATION BOOK FOR STEAM TURBINES
Revision Log Sheet GEK 103567 – Revision I SERIES
REV LEVEL-TYPE OF CHANGE
DATE
Code Book
Rev. 4 - title page
May 1999
A Series
Rev. 2 - added new design A13
July 1997
A9
Rev. 1 - graphic change
May 1996
A10
Rev. 1 - graphic and text change
May 1996
A11
Rev. 1 - graphic and text change
May 1996
A12
Rev. 1 - added design
May 1996
A13
Rev. 0 - added new design
July 1997
D10
Rev. 1 - graphic and text change
May 1996
G Series
Rev. 2 - added ship date G10
July 1997
G8
Rev. 1 - graphic change
May 1996
G9
Rev. 1 - added design
May 1996
G10
Rev. 2 - added ship date
July 1997
SC Series
Rev. 1 - added one design
May 1996
SC5
Rev. 1 - added design
May 1996
G Series
Rev. 3 - revised turbine for design G8
July 1998
G Series
Rev. 3 - added new design G11
July 1998
G11
Rev. 3 - added design
July 1998
C Series
Rev. 4 - added new design C9
May 1999
C9
Rev. 4 - added design
May 1999
D11H
Rev. 5 - added text for new design
June 2001
D11H
Rev. 6 - added new graphic and text
June 2002
D8H
Rev. 6 - added new graphic and text
June 2002
G12
Rev. 6 - added new graphic and text
June 2002
A14
Rev. 6 - added new graphic and text
June 2002
A series
Rev. 6 - updated schematics and added A14
June 2002
B series
Rev. 6 - updated schematics
June 2002
C series
Rev. 6 - updated schematics
June 2002
D series
Rev. 6 - updated schematics
June 2002
DP/DS series
Rev. 6 - updated schematics
June 2002
E series
Rev. 6 - updated schematics
June 2002
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Code Designation Book for Steam Turbines REV LEVEL-TYPE OF CHANGE
DATE
F series
Rev. 6 - updated schematics
June 2002
FP/FS series
Rev. 6 - updated schematics
June 2002
G series
Rev. 6 - updated schematics and added G12
June 2002
H series
Rev. 6 - updated schematics
June 2002
I series
Rev. 6 - updated schematics
June 2002
J series
Rev. 6 - updated schematics
June 2002
K series
Rev. 6 - updated schematics
June 2002
L series
Rev. 6 - updated schematics
June 2002
M series
Rev. 6 - updated schematics
June 2002
N series
Rev. 6 - updated schematics
June 2002
S series
Rev. 6 - updated schematics
June 2002
T series
Rev. 6 - updated schematics
June 2002
SC series
Rev. 6 - updated schematics
June 2002
SAC series
Rev. 6 - updated schematics
June 2002
SANC series
Rev. 6 - updated schematics
June 2002
DAC series
Rev. 6 - updated schematics
June 2002
DANC series
Rev. 6 - updated schematics
June 2002
Introduction
Rev. 6 - updated drawing orientation and nomenclature
June 2002
A series
Rev. 7 - updated schematics
July 2002
DP/DS series
Rev. 7 - updated schematics
July 2002
H series
Rev. 7 - updated schematics
July 2002
L series
Rev. 7 - updated schematics
July 2002
M series
Rev. 7 - updated schematics
July 2002
A Series
Rev. 8– added new design A15
January 2003
A Series
Rev. 8– added A15 to A series schematics
January 2003
Introduction
Rev. 8– updated for Fitchburg closing
January 2003
A Series
Rev. 9– updated A15
November 2003
Code Designation Book for Steam Turbines
GEK 103567J
II. STEAM TURBINE CODE SYSTEM Steam turbines designed and manufactured by GE in Schenectady, NY have been classified by an alphanumeric code system since 1941. This booklet defines that system and lists the code designations of past and current designs. The code system categorizes steam turbine designs on the basis of overall construction configuration, and is not intended to define the detailed design of any specific unit. The configuration code type, however, is the most basic description of steam turbine design, and with the addition of specific information on megawatt rating, last stage bucket length, and steam conditions can be a useful description for many purposes. Prior to 1987, GE produced large steam turbine generators for electric utility applications in Schenectady, medium steam turbine generators in Lynn, Mass., and small industrial units and mechanical drive turbines in Fitchburg, Mass. Since closing of the Lynn plant in 1987, turbines in the former Lynn product scope rated above approximately 40 MW have been produced in Schenectady and the smaller units in Fitchburg. The 40 MW division in product scope is only approximate and is subject to change in the future. Since closing the Fitchburg, Mass., 1998 all smaller size units have been produced in Schenctady. The code system has been extended to include those designs previously built in Lynn and now produced in Schenectady. The addition of the Lynn turbine designs for industrial applications and the new designs developed in Schenectady for combined cycle greatly increases the variety of designs and the number of different code types in active use. Furthermore, many of the new code types are for relatively simple, singlecasing, non-reheat machines, for which the relatively complex rules for defining new code types in use for more complex designs are not appropriate. Therefore, the code system has been divided into two sections. Section I, Reheat and Multi-Casing Non-Reheat Turbines includes the more complex configurations, and new code types are established in accordance with the traditional practice of the Schenectady code system. The reheat and two-casing, non-reheat designs previously produced in Lynn are included in Section I. The turbines of Section II, Single-Casing, Non-Reheat Turbines, are of relatively simple design with limited configuration variation and less complex rules are applied for defining code type.
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Code Designation Book for Steam Turbines
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III. DRAWING ORIENTATION AND NOMENCLATURE CONVENTION Because of the many turbine configurations that are in use it is necessary to adhere to a standard convention for defining direction of rotation, and in the use of nomenclature for identifying such components as valves, bearings and couplings. The orientation shown below is standard practice for this code book and all other diagrams and cross sections for technical and commercial purposes.
Orientation Generator shown on the right, turbine on the left. Turbine End and Generator End of the turbine and Turbine End and Collector End of the generator oriented as shown. Left and right sides defined viewing from turbine to generator. Rotation Standard direction of rotation for all GE steam turbine generators covered by the code system is CCW, viewing the generator from the turbine end. It is important to recognize that rotation is defined for the unit and not for the steam turbine alone, and is independent of code type or the direction of steam flow. Non-standard rotation may be used in circumstances such as for a replacement turbine required to match rotation of an existing non-GE generator, and single-shaft combined cycle applications in which rotation is required to match the gas turbine’s, which is not consistent across the product line. Also, in the mid-1980’s a small number of units were produced in Lynn with non standard rotation based on designs previously applied in single-shaft combined cycle, and in the transition of product scope from Lynn to Schenectady, this was repeated on a small number of units. Bearings
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Code Designation Book for Steam Turbines
Bearings are numbered sequentially beginning with the furthermost from the generator CE. For single shaft combined cycle applications that include the steam turbine in the middle of the train, bearing numbering starts with the gas turbine. Steam turbine bearing numbering designations in these configurations will typically begin with T3 vice T1. See the D10 Schematic as an example. Couplings
Shaft couplings (when more than one) are designated A, B, C etc. from left to right. (In direction of increasing KW loading) Packings
Packings are numbered sequentially beginning with the furthermost from the generator CE. Turbines that have a double shell may have two adjacent packing sections. In this situation the juxtaposed sections only receive one label designation. See the A8 schematic packing section N2, as an example.
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TABLE OF CONTENTS SECTION I REHEAT AND MULTIPLE-CASING, NON-REHEAT STEAM TURBINES SERIES FULL-SPEED, REHEAT, SINGLE-FLOW CONDENSING TURBINES
A
NO CURRENT USE
B
FULL-SPEED, NON-REHEAT, DOUBLE-FLOW CONDENSING TURBINES
C
FULL-SPEED, REHEAT, DOUBLE-FLOW CONDENSING TURBINES
D
FULL-SPEED, TANDEM-COMPOUND, DOUBLE-FLOW, PRIMARY (DP) AND SECONDARY (DS) CONDENSING ELEMENTS FOR CROSS-COMPOUND, FOUR-FLOW, REHEAT TURBINES
DP/DS
NO CURRENT USE
E
FULL-SPEED, REHEAT, TRIPLE-FLOW CONDENSING TURBINES
F
FULL-SPEED, TANDEM-COMPOUND, TRIPLE-FLOW, PRIMARY (FP) AND SECONDARY (FS) CONDENSING ELEMENTS FOR CROSS-COMPOUND, SIX-FLOW REHEAT TURBINES
FP/FS
FULL-SPEED, REHEAT, FOUR-FLOW CONDENSING TURBINES
G
FULL-SPEED, NON-CONDENSING ELEMENTS OF CROSS-COMPOUND TURBINES
H
HALF-SPEED, SINGLE-FLOW CONDENSING TURBINES
J
HALF-SPEED, DOUBLE-FLOW CONDENSING TURBINES
K
HALF-SPEED, TANDEM-COMPOUND DOUBLE-FLOW CONDENSING TURBINES
L
HALF-SPEED, TANDEM-COMPOUND FOUR-FLOW CONDENSING TURBINES
M
HALF-SPEED, TANDEM-COMPOUND SIX-FLOW CONDENSING TURBINES
N
FULL-SPEED, REHEAT, SIX-FLOW CONDENSING TURBINES
S
FULL-SPEED, NON-REHEAT, SIX-FLOW, CONDENSING TURBINES
T
SPECIAL DESIGN SERIES
Special Design SECTION II
SINGLE-CASING, NON-REHEAT STEAM TURBINES CONDENSING TURBINES WITH NO CONTROLLED EXTRACTIONS OR ADMISSIONS
SC
NON-CONDENSING TURBINES WITH NO CONTROLLED EXTRACTIONS OR ADMISSIONS
SNC
CONDENSING TURBINES WITH A SINGLE CONTROLLED EXTRACTION OR ADMISSION
SAC
NON-CONDENSING TURBINES WITH A SINGLE CONTROLLED EXTRACTION OR ADMISSION CONDENSING TURBINES WITH TWO CONTROLLED EXTRACTIONS OR ADMISSIONS NON-CONDENSING TURBINES WITH TWO CONTROLLED EXTRACTIONS OR ADMISSIONS
SANC DAC DANC
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Code Designation Book for Steam Turbines
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IV. SECTION I REHEAT AND MULTIPLE-CASING, NON-REHEAT STEAM TURBINES This category of turbines includes all reheat designs and all non-reheat designs of more than one casing. Designs in this category previously produced in Lynn, Mass. are included. However, the listing of prototype turbines for each code in the pages that follow refers to the first unit made in Schenectady. A. Rules for Establishing Code Designations For any new turbine design, selecting the proper code classification, assigning new classifications, etc., is governed by the following basic rules: 1.
The basic code-series designation, (A, B, C, D, etc.) the first characteristic in the code, is determined by the following characteristics: a. Full speed (3000, 36000 rpm) vs. half speed (1500, 1800 rpm) b. Tandem vs. cross-compound c. Number of Low Pressure flow paths (single, double, triple-flow, etc.) d. Reheat vs. non-reheat e. Condensing vs. non-condensing
2.
Variation in any one or more of the following basic details, within any given code classification, will result in the assignment of a new code number (1, 2, 3, etc.) for any specific turbine. a. Location of main steam control valves (separate chest vs. shell mounted) b. Location of Intercept Valves (on the upper shell vs. separately-mounted) c. Internal vs. external low-pressure crossover pipes d. Relocation of thrust bearing e. Change in number or location of main journal bearings or couplings f.
Conventional bolted-in first stage nozzle (including the expanding nozzle-chest design) vs. the separately supported nozzle boxes
g. HP-IP sections in combined casing vs. separate casings h. Conventional bolted-in partial arc nozzle vs. 360 nozzle 3.
Additional breakdown of important characteristics within a certain code number is indicated by the final letter of the designation. The following is a definition of those suffixes:
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Code Designation Book for Steam Turbines a. A - HP section turned 180 b. D - Double shell construction at the reheat inlet c. E - LP sections using exhaust hoods with the casing exposed at the center portion d. H - LP section exhaust hood designed for high temperature due to high backpressure application e. R - Reheat turbine to be used with light- or heavy-water reactors f.
4.
X - Specialized application not likely to be repeated
In order to limit the multiplicity of turbine code number assignments and to keep these in accord with the basic objective of the code designation system, the following basic variations in similar turbines are not considered relevant enough to change the code designation: a. Top, bottom single or double cross-over pipe connections b. Reheat shells with separately mounted intercept valves may have either four steam inlet connections (two upper and two lower shell) or simply two lower connections c. 3000 rpm (50 cycle) units relative to 3600 rpm (60 cycle) machines. Similarly, no change in code classification of 1800 rpm units will be made for similar designs at 1500 rpm, 1200 rpm, etc. d. The control valve casings mounted on the high pressure shell may be either flanged or welded construction, and individual or multiple valve chest assemblies e. Turbines employing the expanding-nozzle-chest type inner high-pressure shell will still carry the same code designations as used for similar units with the earlier-type inner shell arrangement f.
Overload stage valves (considered as an integral component of the main control valves)
g. Combined reheat valves instead of separate intercept and reheat stop valves h. Single flow vs. double flow nozzle boxes. 90 vs. 180 i.
One or two reheat stages in the moisture separator/reheater, or 2 vessels vs. 4 vessels
j.
Down or side exhaust on LP section(s)
k. Partial arc admission nozzle box vs. 360 nozzle box l.
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Sliding or flexible leg support under front or middle standards
Code Designation Book for Steam Turbines
GEK 103567J
V. A SERIES FULL-SPEED, REHEAT, SINGLE-FLOW CONDENSING TURBINES The A series, in modern practice, includes single-casing and multiple-casing designs and is restricted to reheat turbine only. The earlier definition for the A series code included non-reheat designs. The non-reheat code types A1, A2, A3 and A4 have not been built since the early 1950’s. Code Type
Prototype Turbine
Ship Date
A1
80967
8/48
A2
80974
2/48
A3
93374
10/52
A4
34665
9/41
A5
108827
11/51
A6
198057
5/89
A7
198082
4/91
A8
270T236
12/92
A9
270T250
6/95
A10
270T320
5/95
A11
270T335
12/95
A12
270T369
12/96
A13
270T412
8/99
A14
270T646
9/03
A15
5/04
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A14
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Off-Shell Control Valves(s), Double-Shell High Pressure Section With Reaction Staging, Generator on High Pressure End, Sliding Support of Shell on Front Standard. 21
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Code Designation Book for Steam Turbines
Low Pressure Section
Reheat Section
High Pressure Section
Reheater
A15
Off-Shell Control Valves(s), Double-Shell High Pressure Section With Reaction Staging, Generator on High Pressure End, Sliding Support of Shell on Front Standard. For Single Shaft Combined Cycle and Multi Shaft Combined Cycle.
Low Pressure Section
Reheat Section
High Pressure Section
Reheater
A15
Off-Shell Control Valves(s), Double-Shell High Pressure Section With Reaction Staging, Generator on High Pressure End, Sliding Support of Shell on Front Standard. Fixed Support of Shell on Fixed Mid Standard, Sliding Low Pressure Exhaust Hood. For Single-Shaft and Multi-Shaft Combined Cycle.
Code Designation Book for Steam Turbines
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VI. B SERIES NO CURRENT USE The B series, in modern practice, is reserved for future use. Formerly, the B series code types were applied to full-speed, non-reheat, double-flow designs having one end of the low-pressure rotor supported by the TE generator bearing. These designs have not been built since about 1951. Any future use of a B series code would begin with B3 since some B1 and B2 type turbines many still be in service. Code Type
Prototype Turbine
Ship Date
B1
80992
3/48
B2
93337
8/51
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VII. C SERIES FULL-SPEED, NON-REHEAT, DOUBLE-FLOW CONDENSING TURBINES These designs, in code types C1, C2 and C3, were built in Schenectady until the early 1950’s and then exclusively in Lynn until the first C4 was built in Schenectady in 1987. Code Type
Prototype Turbine
Ship Date
C1
80945
1/48
C2
none
none
C3
87459
5/51
C4
270T174
12/87
C4E
198063
11/89
C5E
198096
8/91
C6
198072
5/90
C7
270T256
7/93
C8
270T268
9/93
C9
270T456
8/00
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VIII. D SERIES FULL-SPEED, REHEAT, DOUBLE-FLOW CONDENSING TURBINES These double-flow, reheat designs have been built in large numbers since 1950. Code Type
Prototype Turbine
Ship Date
D1
99648
8/53
D2
83679
6/50
D3
108841
12/55
D4
108855
4/57
D5
118317
9/60
D6
128950
1/61
D7
170X227
1/64
D8
170X253
6/65
D8D
170X380
12/69
D8H
170X672
7/75
D9
170X401
5/70
D10
270T195
5/94
D11
270T209
8/92
D11H
270T528
2/02
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D8H
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Same as D8 Except Special Low-Pressure Section Design for High Back Pressure Condition and Mid-Standard.
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D11H
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Same as D11 Except Special Low-Pressure Section Design for High Back Pressure Condition and Mid-Standard.
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IX. DP/DS SERIES FULL-SPEED, TANDEM-COMPOUND, DOUBLE-FLOW, PRIMARY (DP) AND SECONDARY (DS) CONDENSING ELEMENTS FOR CROSS-COMPOUND, FOUR-FLOW, REHEAT TURBINES The turbines in this group represent the Primary and Secondary elements of cross-compound machines. Considerable similarity in general design and arrangement exists between this code series and the D series, however, the two are classified separately because the DP and DS individual elements are not designed to operate as independent tandem units. The term primary identifies the element of the cross-compound turbine that contains the highest (initial steam) pressure; the term secondary identifies the mating element of the turbine Code Type
Prototype Turbine
Ship Date
DP1
118389
4/60
DP2
128902
9/59
DP3
128931
1/63
DS1
128903
9/59
DS2
128934
2/63
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X. E SERIES NO CURRENT USE The E series, in modern practice, is reserved for future use. Formerly the E series applied to full-speed, non-reheat, triple-flow turbines. Code type E1 turbines were built prior to about 1953. Any future use of an E series code would begin with E2 since some E1 units may still be in service. Code Type
Prototype Turbine
Ship Date
E1
80958
7/48
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XI. F SERIES FULL-SPEED, REHEAT, TRIPLE-FLOW CONDENSING TURBINES These triple-flow, reheat units were built in large numbers between 1951 and the mid-1960’s. With development of longer last stage buckets, triple-flow designs are no longer produced. Code Type
Prototype Turbine
Ship Date
F1
87463
7/51
F2
99639
6/52
F3
93354
10/52
F4
101606
7/54
F5
115019
10/57
F6
108881
10/57
F7
115073
3/58
F8
115035
6/58
F9
118322
8/58
F10
118369
11/59
F11
128952
8/61
F12
170X197
12/63
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XII. FP/FS SERIES FULL-SPEED, TANDEM-COMPOUND, TRIPLE-FLOW, PRIMARY (FP) AND SECONDARY (FS) CONDENSING ELEMENTS FOR CROSS-COMPOUND, SIX-FLOW REHEAT TURBINES The turbines in this group represent the Primary and Secondary elements of cross-compound machines. Considerable similarity in general design and arrangement exists between this code series and the F series, however, the two are classified separately because the FP and FS individual elements are not designed to operate as independent tandem units. Each element has either a high-pressure or reheat section and, depending upon whether the design is for single or double reheat, a reheat and/or intermediate-pressure section, both elements have a triple-flow, condensing low pressure section. The term primary identifies the element of the cross-compound turbine that contains the highest (initial steam) pressure; the term secondary identifies the mating element of the turbine. Code Type
Prototype Turbine
Ship Date
FP1
118307
3/59
FP2
118356
11/59
FS1
118308
3/59
FS2
118357
11/59
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XIII. G SERIES FULL-SPEED, REHEAT, FOUR-FLOW CONDENSING TURBINES These designs are all tandem-compound, four-flow, condensing turbines except for code type G1 which was used as the secondary element of a cross-compound turbine. Code Type
Prototype Turbine
Ship Date
G1
93340
3/52
G2
170X188
10/62
G2D
170X191
6/67
G3
170X228
1/66
G3D
170X284
12/65
G4
170X321
1/67
G5
170X297
9/67
G5E
170X362
6/68
G6
170X456
8/71
G7
170X541
12/72
G8
270T159
5/86
G9
270T345
3/96
G10
270T380
6/98
G11
270T427
2/00
G12
270T638
12/03
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High Pressure (HP)/Intermediate Pressure G12 Double-Shell (IP) Section with Combined HP/IP inner shell, Nozzle
Boxes, Separate Control Valves, and Separate Intercept Valves, Tandem Double-Flow Exhaust Hoods, Two Separate Condenser Openings, and Thrust Bearing in Front Standard.
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XIV. H SERIES FULL-SPEED, NON-CONDENSING ELEMENTS OF CROSS-COMPOUND TURBINES This series includes all of the non-condensing elements of cross-compound steam turbines. All are reheat except code types H1 and H2 which were either used with non-reheat units or the reheat section was on the secondary element. Some H1 Turbine built in the 1930’s may have been used as back-pressure machines exhausting into headers rather than to the secondary shaft of a cross-compound unit. Code Type
Prototype Turbine
Ship Date
H1
80993
10/48
H2
83601
3/49
H3
93339
8/58
H3A
108872
3/57
H4
93390
12/52
H5
99667
7/54
H6
101651
10/54
H7
108870
2/57
H8
108866
9/57
H9
115006
7/57
H10
101650
9/57
H11
115099
7/58
H12
115053
8/58
H12A
128924
9/60
H13
128927
12/59
H14
170X114
8/61
H15
170X122
5/63
H16
170X142
7/63
H17
170X224
5/64
H18
170X264
7/65
H19
170X177
1/64
H19A
170X181
6/67
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XV. J SERIES HALF-SPEED, SINGLE-FLOW CONDENSING TURBINES These turbines are single-flow, 1500 and 1800 rpm machines. Code type J1 is tandem-compound but all of the others have been used as the secondary shafts of cross compound turbines. It is not expected that these designs will be built in the future because full-speed, tandem-compound designs can be built for the same rating at less cost. Code Type
Prototype Turbine
Ship Date
J1
56625
1/48
J2
108873
2/57
J3
115023
7/57
J4
170X265
8/65
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XVI. K SERIES HALF-SPEED, DOUBLE-FLOW CONDENSING TURBINES These half speed designs are used as the low-pressure element of cross-compound turbines. There is likely to be limited application for these designs in the future because full-speed, tandem-compound turbines can generally be built at the same rating for less cost. Code Type
Prototype Turbine
Ship Date
K1
83631
7/50
K2
99678
3/54
K3
115007
6/57
K4
128925
9/60
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XVII. L SERIES HALF-SPEED, TANDEM-COMPOUND DOUBLE-FLOW CONDENSING TURBINES These designs have a high-pressure or reheat section and a separate double-flow low-pressure section. Fossil plant applications have been both as non-reheat, tandem-compound turbines and as the secondary element of reheat cross-compound turbines. Neither has been produced since the 1950’s. Code types L4, L5 and L6 were used as small nuclear applications. Code Type
Prototype Turbine
Ship Date
L1
83600
4/49
L2
87465
3/51
L3
83642
5/49
L4
170X210
4/64
L5
170X349
10/68
L6
170X484
7/72
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XVIII. M SERIES HALF-SPEED, TANDEM-COMPOUND FOUR-FLOW CONDENSING TURBINES These designs have been used as the low-pressure element of cross-compound turbines in two and three casings, and as complete tandem-compound turbines in three casings. Code Type
Prototype Turbine
Ship Date
M1
170X115
9/61
M2
170X247
10/64
M3
170X182
12/66
M4
170X343
4/68
M4R
none
none
M5
170X346
6/68
M5R
170X684
9/75
M6
170X417
3/70
M6R
170X465
8/72
M7
170X408
none
M7R
170X468
10/71
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XIX. N SERIES HALF-SPEED, TANDEM-COMPOUND SIX-FLOW CONDENSING TURBINES This tandem-compound, six-flow design has been used for the largest nuclear applications. Code Type
Prototype Turbine
Ship Date
N1
170X326
2/68
N1R
170X290
8/66
N2
170X399
7/70
N2R
170X392
6/70
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XX. S SERIES FULL-SPEED, REHEAT, SIX-FLOW CONDENSING TURBINES These tandem-compound, six-flow turbines can be used for the very largest tandem units. Initial steam conditions have been sub-critical and super-critical with single-reheat, and super-critical with double-reheat. Code Type
Prototype Turbine
Ship Date
S1
170X270
10/65
S1E
170X332
10/67
S2
170X540
10/72
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XXI. T SERIES FULL-SPEED, NON-REHEAT, SIX-FLOW, CONDENSING TURBINES This design is for use in non-reheat applications where erosion considerations limit last stage bucket length. The only unit designed was for application with a breeder reactor providing steam at 1450 psig and 900 F. The plant was never completed. Code Type
Prototype Turbine
Ship Date
T1
170X844
none
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XXII. SPECIAL DESIGN SERIES The following units represent turbine designs for specialized application with little probability of being applied again. The first letter of each code number indicates the appropriate code series for the design configuration and the following “X” indicates that the unit is for specialized application. These machines are included for general information and future reference. Code Type
Prototype Turbine
Ship Date
DX1
101685
2/56
FX1
108812
4/56
FX2
108863
6/56
LX1
115064
11/58
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XXIII. SECTION II SINGLE-CASING, NON-REHEAT STEAM TURBINES The turbines in this category are all full-speed, non-reheat, single-casing, single-flow, two-bearing designs and are simpler in configuration and construction than those of Section I. Fewer variations in configuration within each code series are possible. Most of these configurations were produced in Lynn prior to 1987. However, the Lynn plant did not have a formal system of configuration codes. The listing of prototype turbines identifies the first unit of each code type made in Schenectady. Where applicable, these code designations may be applied to turbines built earlier in Lynn. In general, however, new code types are not established for turbine configurations made in Lynn that have not since been produced in Schenectady. A. Rules for Establishing Code Designations 1.
The basic code series is defined by a combination of two or more letters based on whether a. Condensing or non-condensing b. Number of controlled extractions or admissions (0,1 or 2)
2.
Code numbers (1, 2, 3 etc.) within a code series are assigned to identify whether a. Generator driven from the HP or LP end b. Shell-mounted control valves and inlet governing stage or full-throttling, off-shell valve(s)
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XXIV. SC SERIES CONDENSING TURBINES WITH NO CONTROLLED EXTRACTIONS OR ADMISSIONS
Code Type
Prototype Turbine
Ship Date
SC1
198068
3/90
SC2
198055
9/88
SC3
270T238
12/92
SC4
198052
7/88
SC5
270T347
6/96
XXV. SNC SERIES NON-CONDENSING TURBINES WITH NO CONTROLLED EXTRACTIONS OR ADMISSIONS No code types assigned.
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XXVI. SAC SERIES CONDENSING TURBINES WITH A SINGLE CONTROLLED EXTRACTION OR ADMISSION
Code Type
Prototype Turbine
Ship Date
SAC1
198058
11/88
SAC2
198060
7/89
SAC3
270T294
11/94
SAC4
270T296
8/94
XXVII. SANC SERIES NON-CONDENSING TURBINES WITH A SINGLE CONTROLLED EXTRACTION OR ADMISSION
Code Type
Prototype Turbine
Ship Date
SANC1
198064
12/89
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XXVIII. DAC SERIES CONDENSING TURBINES WITH TWO CONTROLLED EXTRACTIONS OR ADMISSIONS
Code Type
Prototype Turbine
Ship Date
DAC1
198062
9/89
DAC2
270T218
8/92
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XXIX. DANC SERIES NON-CONDENSING TURBINES WITH TWO CONTROLLED EXTRACTIONS OR ADMISSIONS
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Code Type
Prototype Turbine
Ship Date
DANC1
198067
5/90
DANC2
270T291
10/94
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GE Power Systems General Electric Company One River Road, Schenectady, NY 12345 518 • 385 • 2211 TX: 145354
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