LUXEMBOURG--(Marketwire - September 02, 2008) - Tenaris S.A. (NYSE:
TS) (BAE: TS) (MXSE: TS) (MILAN: TEN) ("Tenaris") announced today
that it plans to increase its production capacity by installing a
state-of-the-art small diameter rolling mill up to 7" with an annual
production capacity of 450,000 tons of seamless pipes at its
industrial facilities located in Veracruz, Mexico. The installation
of the mill, together with associated iron and steel making and
finishing facilities, will require an investment of approximately
US$1.6 billion. The mill is expected to begin operations by 2011.

In addition to this investment in Mexico, Tenaris plans to continue
to invest in its industrial facilities throughout the world and its
capital investments, excluding the new mill in Mexico, are expected
to amount to approximately US$450 million per year over the next
three years.

With these investments, Tenaris plans to increase its industrial
capacity to meet the growing needs of its customers in Mexico and
worldwide, as oil and gas drilling activity expands and becomes more
complex.

Tenaris is a leading global supplier of steel tubes and related
services for the world's energy industry and certain other industrial
applications.


Giovanni Sardagna
Tenaris
1-888-300-5432
www.tenaris.com

Giovanni Sardagna
Tenaris
1-888-300-5432
www.tenaris.com