stim-03.014_en piping design requirements condensate lines

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Siemens AGEnergy Sector

This document contains proprietary information. It is submitted inconfidence and is to be used solely for the purpose for which it is furnishedand returned upon request. This document and such information is not to bereproduced, transmitted, disclosed, or used otherwise in whole or in partwithout written authorization.

Document typeNo.: STIM-03.014

Steam Turbine Information Manual Revision/Date: 2 2009-08-12

Issued by: E F PR SU EN PD 14

Title

Piping Design Requirements for Condensate Lines of the MAN and MAC

System

Proj Code UA Content CodeUNID-Nr

Document Status: Preliminary Final


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Steam Turbine Information Manual Document No.: STIM-03.014Piping Design Requirements on CondensateLines of the MAC and MAN System Revision/Date: 2 2009-08-12

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Released by: Hartmut Egener E F PR SU EN PD 3 Signed Egener 2009-11-03

Reviewed by: Franz Bruder E F PR PI 15 Signed Bruder 2009-11-03

Reviewed by: Bernd Leu E F PR SU EN PD 14 Signed Leu 2009-10-30

Prepared by: Kakhi Naskidashvili E F PR SU EN PD 14 Signed Naskidashvili 2009-10-30

Name Org. Unit Signature Date

REVISION SHEET

REVISION REISSUE

DATE

SECTION DESCRIPTION OF CHANGE

1 2007-08-15 45

2 2009-08-126

Title changedSection 6 added


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TABLE OF CONTENTS

1. SCOPE .....................................................................................................................................................................4

1.1

RESPONSIBILITIES OF THE PIPE DESIGNER:....................................................................................................4

2. GENERAL ...............................................................................................................................................................4

2.1 NATIONAL STANDARDS.....................................................................................................................................4

3. PIPING DESIGN REQUIREMENTS ....................................................................................................................5

4. REQUIREMENTS ON PIPING SUPPORTS ......................................................................................................5

5. PARTICULAR PIPING AND SUPPORT REQUIREMENTS FOR THE MAN SYSTEM .............................5

6. REQUIREMENTS ON THE PIPING DESIGN AND ARRANGEMENT OF THE COMPONENTS OF

THE MAC SYSTEM ........................................................................................................................................................9

6.1. LP EXHAUST HOOD SPRAY..........................................................................................................................9

6.2. LP EXHAUST HOOD SPRAY FLUSHING ....................................................................................................9


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1. SCOPE

This document covers the piping design requirements for condensate lines in the MAC, MAGand MAN system.

1.1 Responsibilities of the Pipe Designer:

The pipe designer shall be responsible for the design, analysis and specification of theinterconnecting piping systems in accordance with:

ASME B31.1 when designing according to ASME

VGB R503 M and VGB R510 L when designing according to DIN EN / ISO

STIM-03.001

STIM-03.002

2. GENERAL

2.1 National Standards

Specific standards issued by the following organizations shall apply where referencedin this specification. It shall be the designers responsibility to obtain copies of all

referenced documents and drawings. Unless specific exception is taken and approvedby Siemens Energy, the referenced documents shall be considered binding.

ANSI American National Standards InstituteASME American Society of Mechanical EngineersASTM American Society of Testing Materials

or where required

DIN EN Deutsches Institut fr Normung / European NormISO International Standard OrganisationEG Maschinenrichtlinie/ EG Maschine Directive 98/37/EG

Druckgerterichtlinie / Pressure Equipment Directive (PED) 97/23/EG


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3. PIPING DESIGN REQUIREMENTS

Piping and pipe supports shall be designed and implemented with due allowancefor thermal expansion and movement of terminals.

Upstream and downstream straight sections of adequate length in accordance with

STIM-03.002 shall be provided before and afterregulating valves.

An upstream straight section with a length of 20xDi (inside diameter) and adownstream straight section with a length of 10xDi (inside diameter) must beimplemented for orifice MAN5XCF001.

Compensation loops shall located in piping runs as required to accommodatethermal expansion and movement of terminals.

The use of bends and elbows to change piping direction shall be minimized.

4. REQUIREMENTS ON PIPING SUPPORTS

The use of free swinging piping hangers should be avoided or, at the very least,kept to an absolute minimum. If possible the pipes should be supported.

The piping run must be safeguarded against possible vibration excitation fromswitching and flow processes or pump pressure fluctuations with the aid of guidesor dampers.

In the event of seismic design requirements, the support concept must then allowfor the additional forces, moments and vibration.

5. PARTICULAR PIPING AND SUPPORT REQUIREMENTS FOR THE MAN SYSTEM

A fixed point must be provided ahead of and behind water injection valveMAN5XAA151, see Sketch 1. In cases where pipe movement does not allow thistype of fixed point, a spring and damper combination shall be used for the entiresupport configuration, see Sketch 2.


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Sketch 1: Support concept with fixed point

Sketch 2: Support concept with spring and damper combination


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The distance between the branch to overflow line / orifice MAN53BP031 and orificeMAN52BP001 must be less than 1 m.

To accommodate water hammer caused by flashing, the pipe length between valveMAN63AA051 and orifice MAN62BP001 must be kept below 5 m.

Piping of the water injection must be routed such as to ensure automatic venting.

Sketch 3: Connection to overflow line


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Connections to the orifice for the bypass steam inlet must be free from stress andvibration, see Sketch 4.Appropriate pipe supports (springs, dampers) shall be implemented at this location.Rigid supports upstream of the nozzle shall be designed such as to rule outoverloading of the nozzle as a result of vertical displacement of the bypass valves

during assembly or operation of the bypass system.

Sketch 4: Connection to orifice for bypass steam inlet


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6. REQUIREMENTS ON THE PIPING DESIGN AND ARRANGEMENT OF THE COMPONENTSOF THE MAC SYSTEM

6.1. LP EXHAUST HOOD SPRAY

The mesh size of the strainer MAC01AT001 shall not exceed 1,5 mm.

The condensate supply line for the LP exhaust hood spray must be arranged below the outercasing upper part of the LP turbine. In the supply line to the spray nozzles in the casing upper parta splitting flange must be arranged. The splitting flange must be arranged 80 mm below thecasing joint, see sketch.

6.2. LP EXHAUST HOOD SPRAY FLUSHING

The pipeline to the spray nozzle of LP exhaust hood spray has to be flushed. It is recommended toflush the pipeline, before the last Seam of pipeline to the nozzle is welded on.

stim-03.014_en piping design requirements condensate lines

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