May 27, 2011

Company Overview

Company Overview Tenaris 2 May 27, 2011

Global Industrial System

•  Annual manufacturing capacity of six million

tons of steel pipes

-  3.3 million tons of seamless pipes

-  2.7 million tons of welded pipes

•  Manufacturing facilities in 16 countries

•  R&D centers in four countries

•  Service and distribution network in 25 countries

•  25,500 employees (2010)

•  Annual net sales: US$ 7.7 billion (2010)

•  Stock exchange listings:

New York, Buenos Aires, Italy and Mexico

2010 Sales by Region

Serving the world’s energy industry and other industrial applications

Company Overview Tenaris 3 May 27, 2011

Worldwide Operations

Company Overview Tenaris 4 May 27, 2011

A History of Industrial Enterprise •  1930s Agostino Rocca, Techint’s founder, is Managing Director at Dalmine

•  1954 Tamsa and Siderca begin operations

•  1980s Siderca expands capacity for export markets

•  1986 Siderca acquires Siat, an Argentine welded pipe manufacturer

•  1993 Siderca and Tamsa form strategic alliance

•  1996 Dalmine joins the strategic alliance

•  1998-2000 Further expansion through the incorporation of Tavsa, Confab, NKKTubes and AlgomaTubes

•  2001 Launch of Tenaris brand

•  2002 Tenaris becomes a listed company following exchange offer

•  2004 Tenaris integrates Silcotub

•  2006 Tenaris expands in USA, Canada and Colombia through Maverick Tube Corp.

•  2007 With Hydril, Tenaris expands its offer of products and services for the oil & gas industry

•  2009 Tenaris extends presence in the Far East through the integration of SPIJ, an Indonesian OCTG processing operation. Venezuela acquires control over TAVSA

•  2010 Inauguration of new threading facility in Saudi Arabia.

•  2011 Tenaris opens its new rolling mill in Mexico

Company Overview Tenaris 5 May 27, 2011

Integrated Industrial Management

•  4 electric steel shops

•  16 seamless rolling mills

•  32 welded tube mills

•  54 heat treatment lines (28 in hot

rolling mills)

•  94 premium threading lines

•  One Quality Management System

(ISO 9001:2000)

•  One Health, Safety and

Environment Management System

(OHSA 18000 and ISO 14000)

Company Overview Tenaris 6

OCTG

Leading global manufacturer and supplier of tubular products and services used in:

Drilling, completion and production of oil and gas

Transportation of oil and gas

Process and power plants

Specialized industrial and automotive applications

May 27, 2011

Market Segments

Hydrocarbon Processing

Offshore Line Pipe

Power Generation

Onshore Line Pipe

Premium Connections

Industrial & Automotive

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OCTG

•  Tenaris supplies a full range of high

quality casing and tubing, drill pipe,

premium connections, pipe accessories,

sucker rods and coiled tubing for use in all

types of oil and gas drilling and well

completion activities.

•  We accompany our products with

services, based on our expertise of

material selection and pipe handling

•  Our products for oil and gas operations

include: casing & tubing, premium

connections, drill pipe, coiled tubing

and oil tools

Company Overview Tenaris 8

Wedge 523TM BlueTM

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Premium Connections A full range of products and services for ever more demanding E&P applications and environments

TenarisHydril •  Deepwater

•  Deep directional

•  Sour gas

•  Geothermal

•  Arctic

•  Horizontal and extended reach

•  Drilling with casing

•  Shales - Tight Gas

Connections available with Dopeless® technology

Company Overview Tenaris 9 May 27, 2011

Offshore Line Pipe

The offer includes:

•  Top tensioned and steel catenary risers

•  Export lines and flowlines

•  Bends

•  Corrosion Resistant Alloys

(clad, lined and solid)

•  Coiled line pipe

•  Umbilical tubing

•  Coated pipes

Tenaris designs and manufactures high-quality line pipe products for even the most demanding offshore projects

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Tenaris delivers a wide range of seamless

and welded tubes for onshore line pipe to

be used in the most demanding conditions

meeting the specifications of each particular

project.

Onshore Line Pipe

Main markets:

•  Oil and gas pipelines

•  Water and sewage pipelines

•  Mineral slurry pipelines

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Company Overview Tenaris 11

Hydrocarbon Processing

•  Tenaris provides a wide range of seamless

steel tubes and pipes for refineries,

petrochemical and gas-processing plants.

•  Superior and reliable performance,

manufactured according to different

international standards.

•  Supplying of a full range of tubular products

in different steel grades to support large and

complex HPI projects worldwide.

•  Dedicated Tenaris teams are on hand during

the entire project life to ensure quality

delivery, reliable products and services

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Company Overview Tenaris 12 May 27, 2011

Power Generation

•  Tenaris provides tubular products that satisfy

the stringent quality requirements of the power

generation industry.

•  For coal and gas-fired, nuclear and renewables power

plants Tenaris offers a complete range of seamless

tubes and pipes in carbon, special alloy and stainless steels (like TEMPALOY AA-1).

•  Tenaris seamless tubular products satisfy all the

material requirements for high temperature and high pressure applications.

•  Tenaris's laboratories conduct extensive studies and

research on creep resistance.

•  All Tenaris products are designed according to the

most stringent quality standards and manufactured under the certified quality system (ISO 9001).

Company Overview Tenaris 13 May 27, 2011

Industrial & Automotive Services

•  Tenaris provides seamless tubular products

and components for industrial applications such

as hydraulic cylinders, gas cylinders, structural

cranes and mechanical uses.

•  The fully-integrated manufacturing process

includes steelmaking, hot-rolling, cold-drawing,

heat treatments, NDT testing and tubular parts

processing, focused on designing tailor-made

products to meet the needs of customers and

ensure a longer product life, weight reduction, better mechanical properties and reductions

in costs.

•  Tenaris provides a wide range of

seamless tubes and tube-based

components for car manufacturers and

their suppliers.

•  Cold-drawn and hot-rolled seamless

tubes produced for application in safety,

steering, chassis and suspensions, heavy

trucks and trailers, transmission and

power train components.

•  Three automotive service centers in Argentina, Mexico and Romania that

work with teams able to perform high

added-value operations.

Automotive Services Industrial & Mechanical Services

Company Overview Tenaris 14 May 27, 2011

An Integrated R&D Network

Four dedicated research centers specializing in:

Argentina Steel making processes OCTG products

Italy Rolling processes Mechanical and power generation products

Japan Products with high chrome steel level

Mexico Welding technology Linepipe products

•  Full-scale testing and finite element analysis of new products

•  More than 200 scientists and engineers staffing the research facilities and nearly half hold Master or Doctoral degrees

•  Collaboration with selected external R&D laboratories, product testing centers and universities

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•  QHSE standards and objectives integrated

into all management processes

•  Principles of sustainable development

integrated into all operations

•  Employee health and safety, customer

satisfaction and protection of environment

are absolute and integrated priorities

•  QHSE policy encompasses suppliers and

the entire supply chain

•  IT tools and continuous training to enhance

awareness of Quality and HSE issues

•  Constant investment in plants, people and

processes to improve QHSE performance

Pursuing the Highest Standards in QHSE

Values consider own personnel until 2006. Since 2007, figure is showing own personnel plus contractors.

Methodology: World Steel Association Facilities covered: Dalmine, Siderca, Tamsa, Silcotub

Accidents per million man/hours

tn CO2/tls

Company Overview Tenaris 16 May 27, 2011

Investing in Human Resources

Personnel employed by country 25,500 employees (Dec. 2010)

•  Corporate university to align knowledge

and oversee training

•  67 hours of training per salaried employee

in 2010

•  Global Trainee Program: 2-year program

for recent university graduates

•  International, culturally diverse team

•  Working environment that fosters

creativity, initiative, teamwork and

professional growth

•  Compensation system designed to ensure

external and internal quality and reward

performance

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•  Conviction that industry contributes to

lasting and equitable economic growth

•  Working together with local authorities

and non-governmental organizations to

promote and obtain support for the

company’s industrial values within the local communities

•  Programs include Roberto Rocca

Education Program, employee home ownership in Argentina, district heating in

Italy, social inclusion in Mexico and Toni El

Suizo’s global bridge building activities

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Community Development

Investment in Community programs US $12.9 million (2010)

Company Overview Tenaris 18

•  Code of Conduct applicable to all employees

•  Guiding principles of integrity and transparency

for relations between employees, suppliers,

customers and third parties

•  Transparency lines open for employees, suppliers,

customers and shareholders

•  Rigorous international standards for corporate

governance, financial reporting and information

disclosure

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Integrity and Transparency

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