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Ultrasonic cleaning and testing – for better performance and greater efficiencyAdditional offering available for your SGT5-4000F and SGT6-4000F premix and pilot gas burners

Answers for energy.

After cleaning, the burner components are stored,

ready for reassembly

Seal of qualityThe Siemens Field Service Seal

This seal, signifies that your burners have been expertly cleaned at Siemens according to our technical and quality assurance requirements. Our process for the chemical cleaning of burner components – designed to avoid damaging their surfaces – is described in detail in our pro-cedures, which are regularly updated to reflect our latest technical knowledge.

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| BurnerClean |

Flow measurement1

Thermal pre-treatment2

Blow-out33

Drying8

Flow measurement9

Visual inspection10

Conservation11

End of cleaning

OK?

Rinsing5 Rinsing

Passivation6 Passivation

Blow-out77 Blow-out

Immersion cleaning44 Immersion cleaning

Yes No

Ideal burner cleaning sequence with dual-flow measurement

After the cleaning one machine showed improved operation Burner cleaning for SGT5-4000F and SGT6-4000F

What are the benefits of ultrasonic cleaning for premix and pilot gas burners?

Experience with our fleet of turbines with annular combustion chambers has shown that deposits can form on burners over time during operation depending on the fuel used and the ambient conditions. It can affect operating behavior in many ways, including:

■ Carbonization and sulfur deposits (hot/cold spots)

■ Combustion chamber instability

■ Power loss

■ Increased trips (emergency shutdowns).

We offer ultrasonic cleaning of the premix and pilot gas burners in combi-nation with dual-flow measurement. You can see what benefits the cleaning provides, and we can verify the success of this key service.

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„The benefits of Siemens

burner cleaning?

That’s easy – potential for

fewer trips and improved

operation.“Werner Brödner

Siemens Project Manager

On the left, the still uncleaned burner; on the right, the cleaned burner

looking almost like new

Burner cleaning and flow measurement go hand in handFor reliable results

Flow measurement for proven results

In our work process, considerable at-tention is paid to flow measurement before and after cleaning, because this is a key indicator of the effectiveness of the cleaning. It also provides a veri-fication that the cleaning process did not affect operation of your gas turbine. Our internal specifications define in detail the procedure for performing flow measurement.

Using flow measurement, we calculate the effective through flows and the deviation from the mean value of the entire burner set. This allows the cleaning process to be controlled to help prevent damage to the burner. Documentation of the measured values before and after the cleaning provides Siemens Service Engineering with important information for assess-ing the complex burner system as well as any service measures that may be recommended. Or would you rather rely solely on a visual inspection of the burners?

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“Our customers have reported

high satisfaction with the results

of burner cleaning. Flow measure-

ments before and after cleaning

demonstrate the effectiveness

of the process.”Thomas Wänger

Flow Measurement Specialist

Graph:The flow measurement

diagram showing the measurement before cleaning

Photos below: The endoscopic inspection

prior to cleaning reveals deposits that necessitate

a qualified cleaning process

An ideal way to prepare the burner for cleaning Heat treatment followed by blow-out

Thermal pre-treatment

Siemens’ experience with burner cleaning without thermal pretreatment is that it can in many cases yield less than desirable results. Siemens’ process for thermal pre-treatment for burner cleaning is designed to remove organic residues, especially from inside the components to be cleaned. These include residues of, for example, grease, oil, cooling lubricants, and con-servation agents as well as combustion residues – and elemental sulfur, which are often difficult or impossible to remove. The components are heated in a furnace and then, after a prescribed dwell time, they are cooled in a controlled process that can take several hours.

Blow-out

Especially in the case of operationally stressed components, loose particles may be present inside the components after thermal treatment has been performed. We remove these particles by blowing them out with compressed air in order to achieve faster results with the citric acid cleaning process described below.

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“With the thermal pre-treatment of

burners, we strive to optimize results

in the subsequent cleaning process.”Herbert Fandel

Burner Cleaning Specialist

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The burners are cleaned and rinsed in multiple cycles Immersion cleaning in the ultrasonic bath followed by rinsing

Immersion cleaning in citric-acid bath

The components are placed in the heated citric-acid bath. The cleaning effect of this bath is accelerated and intensified by means of ultrasonic waves of a particular frequency. We can vary the cleaning time according to the thickness and type of contamination. The citric-acid cleaning process can take up to several hours. On the basis of past experience, Siemens typically performs two cleaning cycles on operationally stressed components for maximum effectiveness. Results are also confirmed by post-cleaning flow measurement.

Rinsing

Following the citric-acid bath, the parts are rinsed wet-on-wet inside and out with water.

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“Immersion cleaning supported by

ultrasound is essential for optimal

burner cleaning.”Marcus Goetze

Burner Cleaning Specialist

After immersion in the citric-acid bath, the burners

must be spray-washed in order to rinse off any

remaining acid

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A clean solution for outstanding quality Subsequent passivation, blow-out, and drying

Passivation

In order to help prevent rust, non-rustproof components are briefly passivated by immersion in a degreasing bath for a short time after rinsing.

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Blow-out

Partially dissolved particle layers can still remain inside the compo-nents after the acid treatment. These can then later detach in operation and impair the function of the components. For this reason, we perform another blow out with a compressed air device.

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Drying

Blowing out with com-pressed air helps remove remaining particles and dries the components, especially inside, to remove residual humidity which can affect the conservation process.

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Detailed photos show the burners in the

degreasing bath and during subsequent drying

“The sight of a clean burner –

almost like new and ready for

installation – gives me a feeling

of accomplishment every time!”Karsten Wegener

Site Manager

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Final quality controls to optimize effectivenessTesting and handover for installation

Visual inspection

We visually inspect the burner components for contamination externally and also internally using an endoscope and follow a rigorous process to disposition findings. If we ascertain that there are any large, loose particles still inside, we can draw on further treatment processes which have been approved by Siemens Service Engineering.

Conservation

Finally, we coat components made of non-rust-proof material by immersion in or spraying with a universal corrosion resistance agent.

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Graph:Uniform distribution of the

flow values is a sign of an excellent cleaning result

Photos on the right: The endoscopic inspection

after cleaning can verify the success of the

cleaning process

“Our cleaned burners have elicited

positive responses: many customers

have stated that the gas turbines ran

more quietly with fewer trips and

better performance.”Carsten Schmidt

IBS Engineer

Our goal: shortest outage times for the highest availability of your power plantSiemens Field Service worldwide

Qualified, committed, on-site – wherever you need us!

Siemens Field Service offers comprehensive services for complete power plant installations, gas power plants, steam turbine power plants, and generators. We work with state-of-the-art plant diagnosis and fault-detection systems as well as Siemens Service Engineering in order to improve efficiency, reduce emissions, and guarantee availability over the entire lifecycle of the power plants. With our strategically positioned branches in many countries of the world, we are always close to our customers so that we can implement project- and customer-specific field service solutions at any time.

Profit from the expertise and experience of an industry leader:

■ Manufacturer and specialist knowledge based on over 165 years of experience

■ Products and services from the OEM

■ Construction and commissioning of more than 50 new power plants annually

■ Inspections and maintenance annually – 200 gas power plants – 150 steam power plants – 50 conventional islands

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Global presence

■ Locally in more than 190 countries

■ 290 production sites and factories in more than 40 countries

■ 19 field service branches world-wide close to our customers

■ Over 1,500 qualified field service engineers and technicians world-wide

Fast, confidential, flexible:

■ 24/7 telephone hotline for emergencies or issue resolution with your plant

Expert knowledge and know-how through continuous qualification

■ Over 2,000 field service employees

■ Over 100 subcontractors worldwide

■ 100 customer training courses annually

High quality standards

■ Prepared more than 200 project plans annually

■ Integrated quality management system, certified to DIN IS0 9001

Our Field Service worldwide works intensively together

with specialists, subsuppliers and customers – back to grid

as soon as possible

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All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners.

Subject to change without prior notice.

The information in this document contains general descriptions of the technical options available, which may not apply in all cases. The required technical options should therefore be specified in the contract.

Published by and copyright © 2013: Siemens AG Energy Sector Freyeslebenstrasse 1 91058 Erlangen, Germany

Siemens Energy, Inc. 4400 Alafaya Trail Orlando, FL 32826-2399, USA

Energy Service Division Service Fossil Field Service Marketing Region Europe Huttenstr. 12 10553 Berlin, Germany E-mail: field-service-marketing.energy@siemens.com

For more information, please contact our Customer Support Center. Phone: +49 180/524 70 00 Fax: +49 180/524 24 71 (Charges depending on provider)

E-mail: support.energy@siemens.com

Energy Service Division Order No. E50001-G520-A481-X-4A00 | Printed in Germany | Dispo 34805 | c4bs No. 7816 | TH 258-130138 | BR | 461500 | WS | 07131.5