Dedusting Solutions. Metals Technologies

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Metals Technologies

Dedusting Solutions

Technology, mechanical engineering, automation and

electrical engineering from a single source – cleaner steel

production at attractive cost

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For every metric ton of steel produced, 10 to 25 kilograms of dust accumulate.

There‘s no question that modern dedusting systems are crucial, but the costs and

outlay for their operation should be no higher than absolutely necessary. The most

important goals are high reliability, strict compliance with prescribed threshold

values and reasonable energy consumption.

You expect …

Cost-efficient production and maximized productivity

Low consumption levels and efficient energy use

Short delivery times and consistently high availability

Flexibility of charge materials, and in the grades of steel produced

Solid production quality and highly expert solutions – “German quality standards“

Preparation for future environmental and market requirements

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The challenge:

Environmentally oriented

production – with an eye

toward the future

Cleaning up processes

The dedusting system should run cleanly,

removing the large amount of residue

from electric arc furnaces, ladle furnaces, vacuum furnaces or sintering furnaces. And it should run without being disrupted by unfavorable factors and events, such as the use of unclean scrap in steel pro-duction.

Decrease costs, increase availability

To achieve high reliability and favorable operating costs requires the right design. The more cleanly the process parameters are adapted to one another and the more precisely the design is tailored to the up-stream aggregate, the more smoothly the operation will run.

Maintenance is another cost aspect to consider. Long-lasting, low-maintenance components virtually eliminate unplan-ned downtimes. And planunplan-ned downtimes for the dedusting system should be coordi-nated with those of the plant as a whole

to keep total production as high as possible.

Is the system ready for the future?

A dedusting system requires sensible investments. That is why it is so important for the system to be able to accommo-date future expansions of production and potentially stricter environmental regulations – without requiring signifi-cant modification and conversion costs. And for the same reason, you need a plant layout that also offers flexibility for the future.

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Smooth operation – fully automated

Your automation solution reflects years of process knowledge. IT ensures flexible, secure operation, a high degree of safety for people and machinery and high ef-ficiency over the entire life-cycle of the system.

Advanced solutions, such as an inverter for large drives, contribute to decreased energy costs by allowing output and energy consumption to be continuously adapted to production demands.

Equipped for future demands today

Siemens VAI designs your system to harmoniously accommodate any future expansions with no long downtimes or start-up problems. Thus, with your initial investment, we’ve put you on the right track to effectively limiting subsequent costs later on.

The right approach:

Dedusting solutions for your

electric furnace steel mill

Years of expertise

Armed with proven concepts, which have been optimized over many years, we can master any challenge in the dedusting of your electric furnace steel mill. Our range of expertise encompasses five types of primary coolers alone.

Dependability comes from experience

The roughly 200 reference plants built in the last ten years stand as proof of our solid experience. Our engineers have definitively advanced important develop-ments, such as the quenching tower, and have brought them into series production.

You benefit from these advances through high availability, high reliability and guar-anteed elimination of residues such as di-oxin from an electric arc furnace. In other words, you produce steel while we make sure your systems – and thus your steel mill environment – stay clean.

Maintenance? Short, planned and efficient

Robust components, high-quality work-manship and the right design help keep maintenance to a minimum. And our intelligent maintenance time schedule proactively prevents any potential break-downs.

Our systems also allow bags to be changed during operation – another way we contribute to high availability.

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Siemens VAI now offers the entire spectrum of dedusting technology from a single

source, always in close collaboration with your company‘s steel production plant

specialists. This is our approach for creating perfectly coordinated, economically

viable solutions. Today, we combine the special expertise of what was known until

2005 as VAI Pomini with the resources and staying power of Siemens, ensuring

reliable implementation of even the largest projects.

Good reasons for our

dedusting solutions

Guaranteed compliance with agreed-upon limit values

Tailored dedusting units using compre-hensive mini-mill expertise

Future emission requirements are al-ready taken into account in the plant layout

Problem-free operation with low ser-vice requirements

Turnkey solutions from a single source – with one contact, and one person in charge

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To ensure reliable and low-maintenance

dedusting, all modules and processes

must be perfectly coordinated, including

with respect to EAF specifications and

secondary metallurgy. The focus here

is on monitoring the off-gases, their

composition and temperature. The

easi-est way to achieve this is with a solution

from a single source.

Clean solutions –

on every level

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Automation

With SIMATIC, Siemens has been setting the de facto standard in automation technology for about 20 years. No other system is so widely used in the metals industry. The concept of Totally Integrated Automa-tion supports a homogeneous automaAutoma-tion landscape that’s also a safe long-term investment, from the factory floor to the management level.

Total engineering

Accurate planning that addresses everything from energy supply and raw materials logistics to through-put targets is a prerequisite for a successful start of your plant. We provide all the up-front necessities to make sure your project gets off to a safe start, including technical consulting, financing, as well as simulation of all processes.

Life-cycle services

High availability calls for a well-designed service concept, up to and including around-the-clock moni-toring of the plant at Siemens headquarters. Clearly defined processes, uniform manuals, assured parts availability and a globally available team of special-ists ensure minimized shutdown times and high per-formance throughout the life-cycle of the plant.

Across all processes:

Electrical engineering, automation, expertise

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Material handling Ladle furnace Maintenance suction equipment Booster fan Spark (axial hor Canopy Sleeve

ﬁ xed elbow Drop output box

Water-cooled hot gas line

Forced draught cooler (tube type)

Forced draught cooler (plate type)

Quenching tower (spraynozzle type) Spark (axial ve

Auxiliary dedusting

Secondary dedusting

Primary dedusting

Auxiliary dedusting

Additional off-gases from other areas are extracted using the auxiliary dedusting.

Primary dedusting

The off-gases of the electric arc furnace are extracted and cleaned with primary dedusting. Important here is the regulated cooling of the gases to avoid the ac-cumulation or formation of dioxins.

Secondary dedusting

The secondary dedusting takes the off-gases from the furnace covering.

Water-cooled hot gas line

Water-cooled lines cool down the off-gases to about 600 °C and therefore simultaneously reduce its volume.

The products – proven worldwide

and seamlessly integrated

Forced draught cooler

Forced draught coolers are an interesting alternative to the quenching tower, if dioxin does not play a pro-cess-speciﬁ c role and noise protection is in the fore-front instead.

Ausklappseite 2 mm kürzer

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ter n Spark arrestor (axial cyclone) horizontal raught be type) raught te type) g tower zle type) Spark arrestor (axial cyclone)

vertical Mixing dust Fan Reverse air ﬁ lter

Dust silo

Pulse jet ﬁ lter ID fan and stack

Spark arrestor

Spark arrestors are upstream from the actual ﬁ lter section. They protect the ﬁ lter sacks from smoldering particles and simultaneously prevent the danger of explosion.

Quenching tower

The design of the tower signiﬁ cantly determines the chemical composition of the dust. Siemens VAI sets up a two-stage cooling and thus can reliably stop the formation of dioxin. There are different types of cool-ers available depending on the requirements.

Filter

Various ﬁ lter systems are available for selection, depending upon exhaust air speciﬁ cation.

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Quenching towers

The greatest challenge is the fast cooling of the EAF vapor. Here it is important to stay below the temperature range of 200 to 400 °C; otherwise there is the risk that dioxins will form (de novo synthesis). To reliably prevent this, Siemens VAI quenching towers are equipped with the DECOS dioxin reduction system. Us-ing special jets, a water/compressed-air mixture is blown into the cooling tower. Depending on the current conditions, the measured water quantity leads to drip formation, which quickly cools down the off-gas flow.

In a second step, off-gas from the sec-ondary dedusting is mixed in, so that the temperature of the gas mixture goes even lower.

Advantages

Compared to conventional hairpin cool-ers, our quenching tower is distinguished by a number of concrete advantages. Inlet temperature can be up to 1,000° C, compared to the hairpin cooler which is only designed for temperatures up to 600 °C. Space requirements for water precooling are correspondingly smaller with our solution.

In addition, the pressure drop in primary dedusting is significantly smaller, thereby reducing energy consumption of the fans.

And finally, the quenching tower can be quickly and easily cleaned thanks to the simple accessibility of the unit. In con-trast, the lines in hairpin coolers tend to clog and need regular, time-consuming maintenance.

Quenching tower components

Settling chamber

Cylindrical body

Spraying lances installed in the lower part of the cylindrical body

Conical part in the cylindrical body top

Safety explosion doors

Connection duct between the quench-ing tower and the secondary fume line

DEC damper situated in the outlet duct

The cooling of the primary off-gas extracted from the electric arc furnace (EAF) can be done using different systems, which generally consist of the forced draught cooler (FDC) and the quenching tower (QT). When choosing the most suitable system, a major role is played by the necessity to limit the volumes of dioxin and furan emissions.

Primary off-gas cooling

Reliable and efficient

Quenching towers Quenching tower at EGE Celik, Turkey

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Forced draught cooler (FDC)

If the formation of process-specific di-oxins can be excluded, a forced draught cooler is an interesting alternative to the quenching tower (QT). Here the off-gases are extracted through individual lines and cooled from outside by fresh-air fans. Depending on the type of lines, plate- or tube-type coolers are available. Especially the latter type features a high heat trans-fer coefficient.

The cooler has cooling pocket sections with externally situated cooling air fans. Due to its pocket design, the cooler has a limited cleaning requirement, which ensures high levels of operational avail-ability.

Forced draught cooler components

Cooler designed with modular con-struction

Fans controlled according to cooling need

Low noise levels through optional silencers

Inspection doors in the upper part of the cooler

Hoppers to collect coarse dust

Inspection door on the hopper’s lateral side

On/off dampers

Forced draught cooler at ALZ, Belgium Plate-type cooling elements Hairpin natural cooler

Hairpin natural cooler

As an alternative to electrical fan (forced draught cooler – FDC) or air/water control (quenching tower – QT), a hairpin natural cooler can be installed.

Inlet header

Hoppers for dust transport

Inspection doors Pipe bundles No electrical consumption Lowest maintenance 11 070536_PP_Dedusting_RZ2.indd Abs2:11

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The environmental plants

installed by Siemens VAI comprise:

Pulse jet bag filter units and reverse air bag houses

EAF dedusting comprised of water-cooled ducts, drop-out boxes, quench-ing towers, forced draught coolers, cyclones, canopy hoods, mixing cham-bers, filters, fans and stacks

AOD dedusting comprised of water-cooled stacks, forced draught coolers, canopy hoods, filters, fans and stacks

Noise reduction, dog and elephant houses

DeS dedusting comprised of moveable hoods, cyclones, filters, fans and stacks

Dedusting systems for the glass and ceramic industry

As a state-of-the-art system integrator for EAF dedusting equipment, Siemens VAI offers comprehensive in-house solutions for primary and secondary off-gas treat-ment in the field of EAF steelmaking.

These proven Siemens VAI dedusting solutions are characterized by:

Advanced simulation tools

Modular design pulse jet filters

Proven water-cooled duct design

Proven quenching tower design

Proven forced draught cooler design

Custom-made solutions

“Fit-for-use” applications

Highest flexibility

Pulse jet bag filters

Clean solutions for dust handling

Carinox, Belgium, 2005 Venturi valve hall

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Our bag filters are characterized by:

Standard filters designed for low and easy maintenance in a steel shop envi-ronment

Modular filter design, which permits future extensions with add-on com-ponents

Dramatic reductions in installation times due to the modular design of prefabricated panels, hoppers and filter heads

Accurate blowpipe positioning with centering on the venturis, which en-sures long bag life

CFD-modelled filter casing for heavy particle separation and optimized flow distribution through bags

Low energy consumption due to the cast-aluminum classic venturi situated on top of the bags, which provide an efficient secondary air in-draught

Low energy consumption using straight blowpipes, which eliminates elbow losses

Low energy consumption and pressure loss through the filter casing, due to an optimized gas flow, large venturi diameters and maximized damper dimensions

Fully automatic filter cleaning with no moving parts on the inside of the filter

Filter cleaning operation in either online or offline mode

Filter cages, which are designed to protect the bags and allow them to be walked on after installation

Fully standardized service interchange-able parts, which are commercially available worldwide for the entire filter range

Hoppers with steep inclination avoid dust deposits. Pulse jet valve arrangement with noise cover

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Tasks of a computational fluid dynamics (CFD) simulation:

Minimization of the fumes in the melt shop

Optimized canopy design

Optimization of the maximum off-gas flow during scrap charging based on stationary simulated energy balance and fluid dynamics

CFD-simulated off-gas and tempera-ture distribution in dust hopper

Flow optimization with modern CFD

Flow distribution is optimized resulting in less wear and higher efficiency

The secondary dedusting line absorbs the emissions coming from the canopy hoods situated above the furnace. The correct sizing of a canopy hood is based on geometry and fluid mechanics. For this reason, control of secondary canopy hood sizes is increasingly per-formed using fluid dynamic computer simulation programs (CFD).

Secondary off-gas treatment

Precisely calculated flow control

Flow optimization with CFD (Computational fluid dynamics)

Efficient and optimized

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A doghouse/elephant house is a complete enclosure that isolates the furnace shell and evacuates the emissions generated during steel production processes. These furnace enclosures are characterized by:

Soundproof/sound-absorbent panelling

Weights varying from 100 to 160 kg/m2

Thicknesses of up to 350 mm

Guarantees of up to 85 dB (A) or lower

Strong inside ventilation during the tapping phase

Safety panels for explosion control

Complete or partial enclosure

Inlet air ventilation, supplied through silencers, which prevents fume stagnation

Heavy-duty design structures and gear motors with a high safety coefficient

High-speed door movement

Double sealing between mobile and fixed walls

Self-supporting design of the doghouse

Doghouse and elephant house

Minimizing noise emissions

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ERP MES Automation Power, drives and infrastructure

Process

Features

Siemens VAI automation (dedusting PLC) is integrated into an overall PLC system and is programmed according to cus-tomer needs. PLC-based programming allows energy-efficient bag cleaning us-ing different modes (Delta P, continuous, dynamic cleaning pattern) and enables a diagnosis of the bag status.

Benefits and applications

Our filter plants are operated with either online or offline cleaning using the Delta P, continuous and dynamic mode:

Continuous cleaning mode

Constant cleaning air pulses according to programmed values

Constant cleaning operation for shut-downs and maintenance operations

Siemens VAI stands for the combina-tion of technological expertise and unique automation experience in the metals industry.

We also support you in dedusting with advanced automation solutions that al-low you to completely focus on your core task – the production of steel.

Electrical and automation solutions

Enhancing the performance of your dedusting plant

Leading automation solutions based on standards such as SIMATIC S7 and SIMATIC IT …

… on all plant levels from the field up to the management level

Dynamic cleaning mode

Cleaning air pulses according to the differential pressure over filter, while the gas flow is also taken into account

Cleaning operation only when needed

Energy savings

Avoidance of mechanical stress

Cleaning operation for varying gas flows

Delta P cleaning mode

Cleaning air pulses according to the differential pressure over filter

Cleaning operation only when needed

Energy savings

Avoidance of mechanical stress

Cleaning operation for relatively constant gas flows

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You want your plant to produce at competitive costs over

its entire life-cycle, and always have state-of-the-art

tech-nology. That‘s why you make an investment. And for this

investment, you should expect an effective life-cycle

con-cept from your plant manufacturer.

Services offered by Siemens VAI range from planning, consulting and engi-neering to supply of both individual components and complete production line, including safe and rapid start-up. Whether we’re constructing new plants or modernizing existing capacities, our own training specialists make sure that your personnel know how to handle the process and technology safely and efficiently.

What we offer includes …

Presales studies – from design, engi-neering and feasibility studies to im-provement studies

Start-up support – from on-site training to accelerated start-up programs.

Spare part and component supply

Our spare parts service specializes in the engineering and supply of spare and wear parts, technological components and systems. Professional handling en-sures that you receive the right part in the shortest time possible.

Features

Dedicated spare parts service from small proprietary items to major assemblies

Stock control and distribution database Standard packages with measurable

client benefits

Dynamic spare parts and material management system

Material information system Substitution of parts including

reengineering

Service for electrical equipment and automation

The maintenance of your production fa-cilities and equipment is a significant cost factor for you. Yet unplanned process downtime greatly affects the earnings of the entire company. Risks must be mini-mized, as must the costs for keeping those risks small.

Our services

Best performance throughout your plant‘s lifetime

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Siemens VAI Life-cycle Services

As a plant operator, you have conflicting needs. On the one hand, your perfor-mance is measured each quarter against short-term profitability expectations. On the other hand, you have to think on a totally different timescale compared with the capital market. Depending on the lifetime of your plant, you have to take 15 years or more into account. At the very least, that’s 60 full quarters.

But thanks to our comprehensive exper-tise and integrated approach to solutions, you benefit both short-term and long-term from our life-cycle services. In the short term: Backed by our exten-sive experience with many reference plants, we provide you with the certainty of fast, dependable production start-up and shorter amortization periods. In the long term: Our master plan guar-antees competitive performance for your plant in every phase of its life-cycle. Whether we’re providing 24/7 techni-cal support, optimizing maintenance or making permanent plant improvements, we’re always working to ensure the cost-effective operation of your plant.

Recycling Moderniza

tion Newinve

stment Operation

• Investigation/inspections & feasibility study • Design

• Layout • Construction • Installation • Commissioning

Consulting | Planning | Financing

• Service contracts

• Spare parts and components • Consulting and training • Online and offline

maintenance • Maintenance contracting • Migration packages • Upgrading and modernization

Life-cycle management

Partnership never ends

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Turnkey solutions

Success from a single source

Instead of coordination effort …

Normally when a project is assigned there are a large number of suppliers to coordinate for timing, technology and logistics. This complexity is a major factor extending through the life-cycle of the plant, and raises a number of questions: Who is responsible if the design capacity is not achieved at the planned time? Who ensures that the system can be expanded with all its technical complexity?

… we offer a solution as prime contrac-tor that eliminates these worries:

We sort out the technical interfaces and incorporate all components harmo-niously into the overall concept. We work in partnership with

subcon-tractors, such as local companies, and guarantee overall quality.

We ensure completion on schedule and smooth start-up, so you can pay off debt on schedule.

We create a system that is optimized throughout to keep pace with growing requirements.

We construct your plant for a fixed price.

Numerous requirements must be fulfilled when building or modernizing

a dedusting plant. These include: Guaranteed completion within the

agreed time and cost framework, reliable start-up, and rapid attainment

of the planned production volumes and product qualities. The best way

to ensure meeting these requirements is with a turnkey solution from

Siemens VAI. We take complete responsibility for project implementation

and start-up of production, so you can concentrate on your core business

of manufacturing steel and marketing it profitably.

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Secondary processes are no minor matter

We provide our own Siemens solutions for nearly all processes associated with production, from the power supply to water treatment, and from fire protection to railway siding. And everything is backed by services from our local partners. This comprehensive approach is unique. Cross-functional concepts such as Totally Integrated Automation and Totally Inte-grated Power provide synergies and a high degree of standardization.

Your security: Our financial strength and project expertise

In a turnkey project you profit from quali-ties for which Siemens is famous world-wide. This includes a sound financial base as well as the ability to plan projects with foresight and to implement them reliably. It also includes many years of experience in complying with all rules and regula-tions, from customs regulations to ap-proval conditions.

And last but not least, it includes the enthusiasm of our engineers, fitters and start-up engineers, all eager to work together with you to create a world-class system.

If you’re planning to invest in a electric steel plant, we can provide the compre-hensive product, system, integration and service expertise you need for success.

We‘ll be glad to advise you.

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Excellence from experience

The zero-fume solution Customer: Carinox, Belgium

Plant type: Dedusting for EAF, doghouse EAF and converter AOD

Our solution: We installed two different filter plants, one with 28 compartments and one with 24.

The result: As demonstrated during EAF/AOD tapping and charging, the system operates effectively and at high capacity, with no fumes present in the bay.

Selected success stories with dedusting plants

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Cleaner air even under harsh conditions Customer: Terni, Italy

Plant type: Primary and secondary dedusting plant for AOD2 and AOD3

Our solution: We set up two new filters, one with 18 and one with 20 compartments.

The result: Using secondary fume suction lines, dust levels have been drastically reduced in the worst operation phases.

Hot? Everything under control Customer: Gerdau Group, Chile

Plant type: Upgrading of steel plant fume exhaust system for 60-t EAF

Our solution: We installed a new quenching tower and spark arrestor for the primary line in the existing plant after increasing the power of the EAF.

The result: The new quenching tower allows greater control at temperature peaks.

Dedusting solutions from Siemens VAI comprise many years of experience in plant construction embodied by VAI Pomini until 2005.

The integration of Voestalpine Industrieanlagenbau GmbH – and therefore of VAI Pomini – into Siemens AG placed our expertise in complete systems on a new basis. The success stories presented below provide just a brief impression of our comprehensive experience.

Reducing dust by 70% Customer: Arconi, Slovenia

Plant type: Upgrading of steel plant fume exhaust system for 85-t EAF + LF

Our solution: We implemented a 10-compartment filter for this system.

The result: Stack emission is now 1.2 mg/m3_{, with a noise level under Leq 48 dB (A)}

at 100 m. Dust levels in the upper area of the steelshop have been reduced by 70%.

Quiet but powerful Customer: ALZ, Belgium

Plant type: Secondary dedusting plant for 120-t EAF

Our solution: We set up a new doghouse for the dedusting plant.

The result: Noise levels have been reduced to below Leq 85 dB (A).

Staying cool in every situation Customer: Gerdau Group, Canada

Plant type: Revamping of dedusting plant for one 40-t EAF

Our solution: We installed a new filter for primary and secondary suction with a quenching tower cooler.

The result: The new quenching tower allows greater control at temperature peaks.

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Completely Integrated Solutions with Siemens VAI

Integrated offerings for higher plant performance

Optimized processes

We lay the foundation for optimized processes with proven, leading products worldwide, including mechanical and technological engineering for metal production, rolling and strip processing as well as process control engineering, drive engineering and power supply. Inte-grated online and offline process models reflect decades of practical experience and help to ensure reliable, reproducible quality.

Our process engineering expertise fuses these products into complete plant solu-tions that also accommodate the upstream and downstream processes. These solu-tions are the basis for optimal resource use, minimized waiting times and reduced maintenance and spare parts costs, as well as wide flexibility with respect to raw materials and the resulting products.

Efficient production control

A further factor for competitive produc-tion is the quality of informaproduc-tion process-ing. Production data must be consoli-dated and compared with planning data to ensure optimal production flow. As a leading supplier for the metals indus-try Siemens VAI offers integrated infor-mation technology across all autoinfor-mation levels – from the sensor to the Enterprise Resource Planning system. Patented solutions, such as for smelting reduction plants, electric arc furnaces, hot strip mills, profile rolling or processing lines, enable systematic quality assurance, efficient logistics, flexible production planning and scheduling, end-to-end tracking and tracing from raw materials to the end product and back, and much more.

Maximized life-cycle returns

Services from Siemens VAI help to ensure high profitability for your plant through-out the entire life-cycle. Reliable project implementation by our specialists sets the course for quick start-up and repay-ment of funds as scheduled.

During the operating phase, preventive maintenance, standardized components and component design that meets the requirements of steel plants help keep maintenance costs low. A reliable spare parts supply – with in-house workshops for key components – ensures high avail-ability. And modernization at the right time guarantees a high level of competi-tiveness and compliance with environ-mental regulations in the future.

Higher availability

Measurable process improvement

Greater productivity

Integrated information technology

Reduced life-cycle costs

Maximum protection of your investment

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Perfect integration of every aspect

Completely Integrated Solutions from Siemens VAI – your benefits from an integrated concept:

High process quality, lower energy costs and in-creased throughput – by taking all process steps into account

Reproducible high product quality and efficient use of charging materials – thanks to integrated process models

High enterprise quality, low life-cycle costs and unique investment protection – through flexible production based on metal-specific MES systems, intelligent plant design and integrated planning.

Completely Integrated Solutions offer

a comprehensive range of products

and services, tailored and refined to the

specific requirements of your plant.

The key to this approach is the close

inter-linking of plant construction, process

engineering, electrical and automation

engineering, sensors and actuators, as

well as information technology and

life-cycle services, seamlessly integrated

by Siemens VAI.

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www.siemens-vai.com

For further information, please contact:

Siemens VAI

Metals Technologies S.R.L. Via Leonardo da Vinci 20 21053 Castellanza – Varese, Italy Phone: +39 0 331 741211 E-mail: environment.metals @siemens.com

Headquarters: Siemens VAI

Metals Technologies GmbH & Co. P.O. Box 4, Turmstr. 44

A 4031 Linz, Austria

E-mail: [email protected]

The information provided in this brochure contains merely general descriptions or characteristics of performance which in actual case of use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the re-spective characteristics shall only exist if expressly agreed in the terms of contract.

Order No.: E10001-M3-A4-V2-7600 Printed in Germany

Dispo No.: 21661 K-No.: 28103 GB C-MTIS5207M13 WS 05071.5 Subject to change without prior notice

Siemens AG

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