Erection of SST 5000 Turbine Down Exhaust Rev 10

© Siemens Energy, Inc. 2011. All rights reserved.Confidential Information

Siemens Steam Turbine Constructability Overview (Down Exhaust Unit)

Energy Sector© Siemens Energy, Inc. 2011. All rights reserved

Jun-12Page 2 Confidential Information

Contents

SST-5000 Series Turbine (HI-L) - Overview

Major Components – Weights and Dimensions

Overall Assembly Sequence

Detailed Assembly Sequence – General

Detailed Assembly Sequence – LP

Detailed Assembly sequence – HP/IP

Detailed Assembly sequence – Valves

Detailed Assembly sequence – Final Alignment



Steam Power Plants

Gas Turbine and CC

Power Plants

NuclearPower Plants

94Gigawatts

177Gigawatts

290Gigawatts

Fossil & Nuclear Fleet [GWs]and market ranking

# 1

# 2

# 2

Definitions: Siemens’ fleet operating in utilities > 100 MW. Operating plants only; retired, deactivated etc. and projects under construction not included.

Global Installed Capacity and Ranking

561 GW

More than 560 GW installed fleet worldwide

Since 1998, Siemens has had over 330 new apparatus Steam Turbines world wide put into service

244 of these for combined cycle applications64 of these combined cycle units in the Americas (50 and 60 Hz)



Orlando (US)ST Engineering

Charlotte (US)ST/Gen Manufacturing

Muelheim (Germany)ST Engineering & Manufacturing

Cilegon (Indonesia)CondensersComponents

Newcastle (UK)ST Engineering

Budapest (Hungary)Blades/Bearings

Steam Turbine Global Network

1st Unit to be Shipped 1st quarter 2012

Charlotte (US)ST Engineering,

Procurementand

Manufacturing



Conventional reheat turbine product lines ( > 90 MW)

Three product lines covering major applicationsFive basic turbine element typesSeveral modules within each type covering complete power rangeCommon design features,e.g. blading, seal configurationsCommon design elements,e.g. valves, bearings, auxiliary skids

HI30

HI50

HI60

8.7m2

4.4m2

6.9m2

Siemens steam turbine conventional power plant portfolio -A modular product concept permitting high flexibility



Steam Turbine Series –Turbine Series Features and Variants

SST-5000

• First installed in early 90’s – more than 100 in operation

• Two or four flow LP turbines, available with a range of last stage blades (4.4 to 8.7 m2 60Hz, 5.0 to 12.5 m2 50 Hz)

• Applied to >180 MW multishaft (1x1, 2x1, 3x1, 4x1, etc.) applications

• Double flow LP with down, single or dual side exhaust

• Power Range: • ~180 to 480 MW (Two-flow LP turbine)• ~450 to 600 MW (Four-flow LP turbine)

• Max Operating Conditions: 2565 psia / 1112º F / 1112º F



SST-5000 Series Turbine – Combined HP/IP Section

2 Casing Design

Monobloc Rotor

Spring-Back Seals

Fully 3-dimensional high performance variable reaction blading (3DVTM)

Combined Stop and Control Valves – Bolted onto the Lower Half of the HP/IP Casing (assembled on site)

Module Shipped to site pre-assembled from the factory



SST-5000 Series Turbine – LP Turbine

High-performance LP blading for

different sizes of exhaust area (4.4 to

8.7 m^2)

Efficient erosionprotection measures

Double flow LP with single side, dual side,

or down exhaust arrangements

Single Piece Bolted Upper Half

LP Inner Casing –Supported on

Bearing Pedestals

LP Outer Casing Exhaust is Welded directly to Condenser Hardware (no expansion joint)



SST-5000 Turbine – Cross Section

Fixed Bearing Pedestals

Combined Thrust/Journal

Bearing

One Cross Over Pipe Shared Journal

Bearings

Hydraulic Turning Gear



LP Turbine

Generator

HP/IP Turbine

Valves

Cross Over Pipe

Double Flow Down Exhaust SST5000 Double Flow Down Exhaust SST5000 ConfigurationConfiguration



Major Components Weights and Dimensions

Please see following table for list of some major components, weights, dimensions and quantities. This is not a complete packing list and the data is

subject change during design.

936823036,156Bearing 3 Casing Assembly1



4552997,496Guide Bolts2

142227236151,017LP Inner Case Lower Part1

17218122783,776LP Inner Case Upper Part1

497312910,693Guide Blade Carrier Assy.2

45961689,767Stationary Blade Ring Assy.2

149146359167,552LP Rotor Assembly1

10913214752,250RHT Stm Stop/Control Valve Assy.2

8511711720,944Main Stm Stop/Control Valve Assy.2

151144377269,846K Turbine Section Assy.1

Height [in]Width

[in]Length

[in]Gross

[lb]ComponentQty



Major Components Weights and Dimensions

Please see following table for list of some major components, weights, dimensions and quantities. This is not a complete packing list

and the data is subject change during design.

15613438364,060LP Outer Casing Upper Part TS1

15613438369,234LP Outer Casing Upper Part GS1

10720837588,714LP Outer Casing End Wall Rear1

107208375105,070LP Outer Casing End Wall Front1

Down Exhaust

71621755,909LP Induction Valve2

142791627,937Gland Condenser Skid1

103561037,055Control Fluid Skid1

15813850070,548Lube oil skid1

Height [in]

Width [in]

Length [in]

Gross [lb]ComponentQty



Steam Turbine Series – Constructability

• Expected Construction Times for the SST-5000

SST-5000: 7-10 Months

• Modular features of both series (core turbine components and modular auxiliary systems) aid the constructor to reduce the amount of on site work

• Commissioning Times Ranges from 2-3 Months

• In some cases, there is overlap between construction and commissioning schedules, depending on how the project is being executed

Construction and Commissioning Times estimates strongly depend on manpower availability, project schedule, technical experience of

construction personnel, etc.



Steam Turbine Series – Equipment Lead Times

• Siemens Standard quoted Lead Time delineates the main ST components, comprising of the HP/IP and LP Turbine Rotor/Inner Casing

• However, other equipment will be shipped earlier, to facilitate construction of the unit on site:

• Bearing Pedestals: Ex-Works – 2 months

• LP Outer Casing: Ex-Works – 1 month

• These two components are required to start installation of the steam turbine equipment and are sequenced before the HP/IP, LP turbineand LP rotors, so by the time the main ST components reach site,the plant construction team should be ~2 months into the erection of the ST equipment




Following is the general assembly sequence for SST5000 turbine

Insert Anchor bolts, Align and Grout bearing pedestals in foundation

Install HP/IP turbine – shipped completely assembled

Install LP turbine

Install LP outer casing

Install LP inner casing – lower half

Install LP rotor and align

Install LP inner casing – upper half

Install LP outer casing – upper half

Install Cross Over Pipe

Install Valves




Siemens provides Erection and Commissioning ManualsManuals include:

All required field installation drawings and BOMs ( Bills of Material )Weld procedures for field welds of Siemens to Siemens weldsData sheets indicating how to take and record critical data forreview and recordProject sequence for erection

Reference schedule in manual depicts a 7 month schedule for the erection phase of the ST/Generator components



Assembly Sequence – Foundation and Bearing Pedestals

Overview of Siemens Foundation and Bearing Pedestal/Alignment Hardware:Siemens provides anchor bolts and spherical nuts and washers for bearing pedestals

Nuts and washers inserted in embedment box prior to final pourBearing Pedestals are aligned laterally and vertically in relation to each other, to ensure proper rotor train alignment

Following completion of the alignment process, bearing pedestals are grouted in place (bearing pedestals are fixed in place)

Siemens provides horizontal guide pin, used as lateral fixed point and for alignment of the LP Inner Casing

Following completion of the alignment process, centering guides are grouted in place



Assembly Sequence – Foundation and Bearing Pedestals (Overview)

Foundation checks, Pedestal Installation, Alignment, and Grouting: 3-4 Weeks



Assembly Sequence – Down Exhaust Foundation

Foundation Preparation – Bearing Pedestal Foundation Box Embedments

Embedment Box for Anchor Bolt Nut and Washers not Provided by Siemens as a part of a standard offer



Detailed Assembly Sequence – General –Down Exhaust Contd.

Bearings and Centering Guide



Assembly Sequence of Down Exhaust LP turbine – Mounting of LP Inner Casing Centering Guide

Embedment for Centering Guide (details provided by Siemens, final design and supply by foundation design entity)

Centering Guide Aligned to Bearing Centerline, welded, and grouted in place



Detailed Assembly Sequence – HP/IP turbine

HP turbine in the following description refers to the combined HP/IP “K”type turbine:

HP/IP Installation and Alignment (Casing and Coupling to LP): 3-4 Weeks

K Turbine is Pre-Assembled from the factory, thus most of the work involved alignment of the casing and subsequent alignment to the LP turbine rotor



Detailed Assembly Sequence – HP/IP turbine

Assembled K turbine.



Lifting & Setting the K turbine on the Foundation



Lifting & Setting the K turbine on the Foundation



Detailed Assembly Sequence – HP/IP turbine –Contd.

Installed K turbine on foundation



Assembly Sequence of Down Exhaust LP Turbine (Design/Assembly Features)

LP Outer CasingOuter Casing design has no impact on turbine rotor train alignment (design is inherently decoupled from LP inner casing and Rotor)Casing is purely used to direct steam to the condenser, designed to withstand the vacuum forces imparted during operationOnce completed, no additional installation or alignment is required

LP Inner CasingInner Casing components are pre-aligned from the factory (upper and lower halves)Lower Casing is installed and aligned via tightwire to the rest of the turbine train in the fieldRotor is then installed, radial/axial clearances checked, upper halves of blade rings and diaphragms are installed and upper half of the inner casing is installedThere is no need to remove the LP rotor once installed, nor additional individual alignment efforts on LP diaphragms or blade rings



Detailed Assembly Sequence – LP Turbine

LP Outer Casing Construction, Inner Casing Installation and Alignment, Completion of Overall LP Turbine: 17-19 Weeks



Assembly Sequence of Down Exhaust LP turbine



Assembly Sequence of Down Exhaust LP turbine – Continued

Horizontal Joint Bolt Connection

Outer Casing Lower Half

Side Wall

End Wall

Internal Stiffeners




LP Outer Cylinder Base End Walls




Lower End Walls on Foundation




Set, install, and align side walls for final welding




Installation of internal support hardware




Assemble and align outer casing cover

Set LP outer cover aside



Setting the LP Inner Casing Lower Half

Note: Guide blade Carriers come shipped already installed in the lower half casing.



Assembly Sequence of LP turbine – Continued

Set down Inner casing Bottom Half



Preparing the rotor for installation



Installing the rotor



Installing the Guide Blade Carriers and L-0 Blade Rings



Cleaning/Preparing and Installing the Inner Casing Upper Half



Completed Assembly Sequence of LP turbine –Down Exhaust Shown

Assembled LP



Building the Crossover Pipe

Crossover Pipe ships as 4 Major Pieces Fit & Welded in the Field



Detailed Assembly Sequence – Valves

Valve Installation, Instrumentation: 3-4 Weeks



Preparation

Main Steam / Hot Reheat Valves



Main Steam / Hot Reheat ValvesMain Steam / Hot Reheat Valves



Installing the HP Combined Stop / Control Valve







Detailed Assembly Sequence – Final Alignment, Instrumentation, etc.

Final Alignment, Final Instrumentation Installation, Preparation for Flushing: 5-6 Weeks



Assembly Sequence Overview – Bearing Instrumentation

Junction Boxes for Wiring Provided with equipment

Cable Connection/Routing into Bearing Pedestal Instrumentation

View of Installation Method for Speed Probes



Assembly Sequence Overview– HI Turbine Instrumentation

Thermocouples Pre-Wired to External Junction Boxes (mounted on HI Turbine Casing)



Lube Oil Skid

Lube Oil system will be shipped pre-assembled on two skids

Lube Oil Pump/Tank SkidLube Oil Cooler Skid

Duplex Filters

AC Pumps

DC PumpLift Oil Pumps

Oil Mist Eliminator

Lube Oil Skid Standard design is for installation ~15 feet below ST centerlineFor down exhaust configurations, option can be supplied for installation at grade level



Gland Steam Condenser Skid

Gland steam condenser skid will be shipped assembled

Gland Steam Condenser

Exhauster2x100%



Control Oil System

Control Oil system will be shipped assembled to site



Completed down exhaust Turbine

Date post:	24-Oct-2015
Category:	Documents
Upload:	paulon9271
View:	145 times
Download:	13 times

Erection of SST 5000 Turbine Down Exhaust Rev 10

Documents