Tenaris, S.A. Announces Conference Call to Discuss the Company's Second Quarter 2007 Results

On behalf of Tenaris, S.A. (NYSE:TS) we would like to invite you to participate in a conference call to discuss the Company’s Second Quarter 2007 Results. Please note that the press release will be issued aftermarket close on Friday, August 3, 2007. Representing Tenaris will be Carlos Condorelli, Chief Financial Officer, Germán Curá, North American Area Manager, Alejandro Lammertyn, Commercial Director, and Nigel Worsnop, Investor Relations Director. Following a brief summary, the conference call will be opened to questions. WHEN: Monday, August 6, 2007 TIME: 10:00 a.m. (Eastern Time) WEBCAST: http://www.tenaris.com/en/Investors/calendar.asp DIAL IN #: 888-679-8038, 617-213-4850 (International Dial Number) PASSCODE #: 19757967 Please dial in 10 minutes before the scheduled start time A replay of the conference call will be available in our webpage www.tenaris.com/investors or from 2:00 pm on August 6th through 12:00 pm on August 13th. To access the replay, please dial 888-286-8010 or 617-801-6888 and enter passcode "65020390” when prompted.