Steam Turbine Code Types

GEK 10356 7JRevised 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 forevery possible contingency to be met in connection with installation, operation or maintenance. Shouldfurther information be desired or should particular problems arise which are not covered sufficiently forthe purchaser’s purposes the matter should be referred to the GE Company.

© 2002 GENERAL ELECTRIC COMPANY

GEK 1 03567J C ode Des ign ation Boo k for Ste am Tu rb ine s

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Code De sig nation B ook for Steam Turbin es GEK 10356 7J

I. CODE DESIGNATION BOOK FOR STEAM TURBINES

Revision Log SheetGEK 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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GEK 103567J Code Designation Book for Steam Turbines

SERIES 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

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II. STEAM TURBINE CODE SYSTEM

Steam turbines designed and manufactured by GE in Schenectady, NY have been classified by an alpha-numeric code system since 1941. This booklet defines that system and lists the code designations of pastand current designs. The code system categorizes steam turbine designs on the basis of overall constructionconfiguration, and is not intended to define the detailed design of any specific unit. The configurationcode type, however, is the most basic description of steam turbine design, and with the addition of specificinformation on megawatt rating, last stage bucket length, and steam conditions can be a useful descriptionfor 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 turbinesin Fitchburg, Mass. Since closing of the Lynn plant in 1987, turbines in the former Lynn product scoperated 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. Sinceclosing 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 producedin Schenectady. The addition of the Lynn turbine designs for industrial applications and the new designsdeveloped in Schenectady for combined cycle greatly increases the variety of designs and the number ofdifferent code types in active use. Furthermore, many of the new code types are for relatively simple, single-casing, non-reheat machines, for which the relatively complex rules for defining new code types in use formore 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, andnew 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. Theturbines of Section II, Single-Casing, Non-Reheat Turbines, are of relatively simple design with limitedconfiguration variation and less complex rules are applied for defining code type.

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GEK 1 03567 J C ode Des ign ation Boo k for Ste am Tu rb ine s

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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 conventionfor 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 sec-tions for technical and commercial purposes.

Orientation

Generator shown on the right, turbine on the left. Turbine End and Generator End of the turbine and TurbineEnd and Collector End of the generator oriented as shown. Left and right sides defined viewing from turbineto 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 theunit 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 matchrotation of an existing non-GE generator, and single-shaft combined cycle applications in which rotation isrequired to match the gas turbine’s, which is not consistent across the product line. Also, in the mid-1980’sa small number of units were produced in Lynn with non standard rotation based on designs previouslyapplied 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 shaftcombined cycle applications that include the steam turbine in the middle of the train, bearing numberingstarts with the gas turbine. Steam turbine bearing numbering designations in these configurations willtypically 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 ofincreasing KW loading)

Packings

Packings are numbered sequentially beginning with the furthermost from the generator CE. Turbines thathave a double shell may have two adjacent packing sections. In this situation the juxtaposed sections onlyreceive one label designation. See the A8 schematic packing section N2, as an example.

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TABLE OF CONTENTSSECTION I

REHEAT AND MULTIPLE-CASING, NON-REHEAT STEAM TURBINESSERIES

FULL-SPEED, REHEAT, SINGLE-FLOW CONDENSING TURBINES ANO CURRENT USE BFULL-SPEED, NON-REHEAT, DOUBLE-FLOW CONDENSING TURBINES CFULL-SPEED, REHEAT, DOUBLE-FLOW CONDENSING TURBINES DFULL-SPEED, TANDEM-COMPOUND, DOUBLE-FLOW, PRIMARY (DP) ANDSECONDARY (DS) CONDENSING ELEMENTS FOR CROSS-COMPOUND,FOUR-FLOW, REHEAT TURBINES

DP/DS

NO CURRENT USE EFULL-SPEED, REHEAT, TRIPLE-FLOW CONDENSING TURBINES FFULL-SPEED, TANDEM-COMPOUND, TRIPLE-FLOW, PRIMARY (FP) ANDSECONDARY (FS) CONDENSING ELEMENTS FOR CROSS-COMPOUND,SIX-FLOW REHEAT TURBINES

FP/FS

FULL-SPEED, REHEAT, FOUR-FLOW CONDENSING TURBINES GFULL-SPEED, NON-CONDENSING ELEMENTS OF CROSS-COMPOUNDTURBINES H

HALF-SPEED, SINGLE-FLOW CONDENSING TURBINES JHALF-SPEED, DOUBLE-FLOW CONDENSING TURBINES KHALF-SPEED, TANDEM-COMPOUND DOUBLE-FLOW CONDENSING TURBINES LHALF-SPEED, TANDEM-COMPOUND FOUR-FLOW CONDENSING TURBINES MHALF-SPEED, TANDEM-COMPOUND SIX-FLOW CONDENSING TURBINES NFULL-SPEED, REHEAT, SIX-FLOW CONDENSING TURBINES SFULL-SPEED, NON-REHEAT, SIX-FLOW, CONDENSING TURBINES TSPECIAL DESIGN SERIES Special

DesignSECTION II

SINGLE-CASING, NON-REHEAT STEAM TURBINESCONDENSING TURBINES WITH NO CONTROLLED EXTRACTIONS ORADMISSIONS

SC

NON-CONDENSING TURBINES WITH NO CONTROLLED EXTRACTIONS ORADMISSIONS

SNC

CONDENSING TURBINES WITH A SINGLE CONTROLLED EXTRACTION ORADMISSION

SAC

NON-CONDENSING TURBINES WITH A SINGLE CONTROLLED EXTRACTIONOR ADMISSION

SANC

CONDENSING TURBINES WITH TWO CONTROLLED EXTRACTIONS ORADMISSIONS

DAC

NON-CONDENSING TURBINES WITH TWO CONTROLLED EXTRACTIONS ORADMISSIONS

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 prototypeturbines 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 deter-mined 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 bythe final letter of the designation. The following is a definition of those suffixes:

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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 appli-cation

e. R - Reheat turbine to be used with light- or heavy-water reactors

f. X - Specialized application not likely to be repeated

4. In order to limit the multiplicity of turbine code number assignments and to keep these in accordwith the basic objective of the code designation system, the following basic variations in similarturbines 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 con-nections (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 changein code classification of 1800 rpm units will be made for similar designs at 1500 rpm, 1200rpm, etc.

d. The control valve casings mounted on the high pressure shell may be either flanged or weldedconstruction, and individual or multiple valve chest assemblies

e. Turbines employing the expanding-nozzle-chest type inner high-pressure shell will still carrythe same code designations as used for similar units with the earlier-type inner shell arrange-ment

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. 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 toreheat turbine only. The earlier definition for the A series code included non-reheat designs. The non-reheatcode 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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14


15


16


17


18


19


20


A14 Off-Shell Control Valves(s), Double-Shell High PressureSection With Reaction Staging, Generator on HighPressure End, Sliding Support of Shell on Front Standard.

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Off-Shell Control Valves(s), Double-Shell High PressureSection With Reaction Staging, Generator on HighPressure End, Sliding Support of Shell on Front Standard.For Single Shaft Combined Cycle and Multi Shaft Combined Cycle.

A15

Low PressureSection

ReheatSection

High PressureSection

Reheater

GEK 103567J Code Designation Book for Steam Turbines

Off-Shell Control Valves(s), Double-Shell High PressureSection With Reaction Staging, Generator on HighPressure 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.

A15

Low PressureSection

ReheatSection

High PressureSection

Reheater


VI.

B SERIES

NO CURRENT USE

The B series, in modern practice, is reserved for future use. Formerly, the B series code types were appliedto full-speed, non-reheat, double-flow designs having one end of the low-pressure rotor supported by theTE generator bearing. These designs have not been built since about 1951. Any future use of a B seriescode would begin with B3 since some B1 and B2 type turbines many still be in service.


B1 80992 3/48

B2 93337 8/51

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24


25


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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 thenexclusively in Lynn until the first C4 was built in Schenectady in 1987.


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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28


29


30


31


32


33


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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.


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

35


36


37


38


39


40


D8H Same as D8 Except Special Low-Pressure Section Design forHigh Back Pressure Condition and Mid-Standard.

41


42


D11H Same as D11 Except Special Low-Pressure Section Design forHigh Back Pressure Condition and Mid-Standard.

43


44


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 tooperate as independent tandem units.

The term primary identifies the element of the cross-compound turbine that contains the highest (initialsteam) pressure; the term secondary identifies the mating element of the turbine


DP1 118389 4/60

DP2 128902 9/59

DP3 128931 1/63

DS1 128903 9/59

DS2 128934 2/63

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46


47


48


49


50


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 ofan E series code would begin with E2 since some E1 units may still be in service.


E1 80958 7/48

51


52


53


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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 devel-opment of longer last stage buckets, triple-flow designs are no longer produced.


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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56


57


58


59


60


61


62


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 tooperate as independent tandem units.

Each element has either a high-pressure or reheat section and, depending upon whether the design is forsingle 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 (initialsteam) pressure; the term secondary identifies the mating element of the turbine.


FP1 118307 3/59

FP2 118356 11/59

FS1 118308 3/59

FS2 118357 11/59

63


64


65


66


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 whichwas used as the secondary element of a cross-compound turbine.


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

67


68


69


70


71


72


73


G12 Double-Shell High Pressure (HP)/Intermediate Pressure(IP) Section with Combined HP/IP inner shell, NozzleBoxes, Separate Control Valves, and Separate InterceptValves, Tandem Double-Flow Exhaust Hoods, Two SeparateCondenser 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 reheatexcept code types H1 and H2 which were either used with non-reheat units or the reheat section was on thesecondary element. Some H1 Turbine built in the 1930’s may have been used as back-pressure machinesexhausting into headers rather than to the secondary shaft of a cross-compound unit.


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

75


76


77


78


79


80


81


82


83


84


85


86


87


88


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 ofthe others have been used as the secondary shafts of cross compound turbines. It is not expected that thesedesigns will be built in the future because full-speed, tandem-compound designs can be built for the samerating at less cost.


J1 56625 1/48

J2 108873 2/57

J3 115023 7/57

J4 170X265 8/65

89


90


91


92


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 likelyto be limited application for these designs in the future because full-speed, tandem-compound turbines cangenerally be built at the same rating for less cost.


K1 83631 7/50

K2 99678 3/54

K3 115007 6/57

K4 128925 9/60

93


94


95


96


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 secondaryelement 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.


L1 83600 4/49

L2 87465 3/51

L3 83642 5/49

L4 170X210 4/64

L5 170X349 10/68

L6 170X484 7/72

97


98


99


100


101


102


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 threecasings, and as complete tandem-compound turbines in three casings.


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

103


104


105


106


107


108


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.


N1 170X326 2/68

N1R 170X290 8/66

N2 170X399 7/70

N2R 170X392 6/70

109


110


111


112


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 con-ditions have been sub-critical and super-critical with single-reheat, and super-critical with double-reheat.


S1 170X270 10/65

S1E 170X332 10/67

S2 170X540 10/72

113


114


115


116


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.


T1 170X844 none

117


118


119


120


XXII.

SPECIAL DESIGN SERIES

The following units represent turbine designs for specialized application with little probability of beingapplied again. The first letter of each code number indicates the appropriate code series for the designconfiguration and the following “X” indicates that the unit is for specialized application. These machinesare included for general information and future reference.


DX1 101685 2/56

FX1 108812 4/56

FX2 108863 6/56

LX1 115064 11/58

121


122


123


124


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 designsand are simpler in configuration and construction than those of Section I. Fewer variations in configurationwithin 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 prototypeturbines identifies the first unit of each code type made in Schenectady. Where applicable, these codedesignations may be applied to turbines built earlier in Lynn. In general, however, new code types are notestablished 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)

125


126


XXIV.

SC SERIES

CONDENSING TURBINES WITH NO CONTROLLED EXTRACTIONS OR ADMISSIONS


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 ORADMISSIONS

No code types assigned.

127


128


129


130


XXVI.

SAC SERIES

CONDENSING TURBINES WITH A SINGLE CONTROLLED EXTRACTION OR ADMISSION


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 ORADMISSION


SANC1 198064 12/89

131


132


133


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XXVIII.

DAC SERIES

CONDENSING TURBINES WITH TWO CONTROLLED EXTRACTIONS OR ADMISSIONS


DAC1 198062 9/89

DAC2 270T218 8/92

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XXIX.

DANC SERIES

NON-CONDENSING TURBINES WITH TWO CONTROLLED EXTRACTIONS ORADMISSIONS


DANC1 198067 5/90

DANC2 270T291 10/94

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GE Power Systems

General Electric CompanyOne River Road, Schenectady, NY 12345518 • 385 • 2211 TX: 145354

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Steam Turbine Code Types

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