Tenaris SALuxembourg, has elected Paolo Rocca as chairman of the board. Rocca adds this position to his current role as chief executive officer.Additionally, Tenaris announced that it has acquired all shares and ADS of Tubos de Acero de Mexico SA (Tamsa) that it did not own before.Tenaris SA is a leading global manufacturer of seamless steel pipe products, and provider of pipe handling, stocking, and distribution services to the oil and gas, energy, and mechanical industries; and is a leading regional supplier of welded steel pipes for gas pipelines in South America. The company has manufacturing facilities in Argentina, Brazil, Canada, Italy, Japan, Mexico, and Venezuela, and customer se...

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