Steam Turbine Code Types

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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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


May 1996

A12

Rev. 1 - added design

May 1996

A13

Rev. 0 - added new design

July 1997

D10


May 1996

G Series

Rev. 2 - added ship date G10

July 1997

G8

Rev. 1 - graphic change

May 1996

G9


May 1996

G10

Rev. 2 - added ship date

July 1997

SC Series

Rev. 1 - added one design

May 1996

SC5


May 1996

G Series

Rev. 3 - revised turbine for design G8

July 1998

G Series

Rev. 3 - added new design G11

July 1998

G11


July 1998

C Series

Rev. 4 - added new design C9

May 1999

C9


May 1999

D11H

Rev. 5 - added text for new design

June 2001

D11H

Rev. 6 - added new graphic and text

June 2002

D8H


June 2002

G12


June 2002

A14


June 2002

A series

Rev. 6 - updated schematics and added A14

June 2002

B series

Rev. 6 - updated schematics

June 2002

C series


June 2002

D series


June 2002

DP/DS series


June 2002

E series


June 2002

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Code Designation Book for Steam Turbines REV LEVEL-TYPE OF CHANGE

DATE

F series


June 2002

FP/FS series


June 2002

G series

Rev. 6 - updated schematics and added G12

June 2002

H series


June 2002

I series


June 2002

J series


June 2002

K series


June 2002

L series


June 2002

M series


June 2002

N series


June 2002

S series


June 2002

T series


June 2002

SC series


June 2002

SAC series


June 2002

SANC series


June 2002

DAC series


June 2002

DANC series


June 2002

Introduction

Rev. 6 - updated drawing orientation and nomenclature

June 2002

A series


July 2002

DP/DS series


July 2002

H series


July 2002

L series


July 2002

M series


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


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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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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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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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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


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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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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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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.


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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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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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