This certificate verifies that Marwan Shehata Mohamed Zeitoun successfully completed and passed the online course "PIPE01x: Introduction to Oil Country Tubular Goods (OCTG)" offered by TenarisUniversity through edX. The course was directed by Mario Vespa of Tenaris and Rolando Lange of TenarisUniversity. The certificate can be verified online at the provided URL.

1. Technical Sales Manager and Professor
Tenaris
Mario Vespa
Director
TenarisUniversity
Rolando Lange
HONOR CODE CERTIFICATE Verify the authenticity of this certificate at
CERTIFICATE
HONOR CODE
Marwan Shehata Mohamed Zeitoun
successfully completed and received a passing grade in
PIPE01x: Introduction to Oil Country Tubular Goods
(OCTG)
a course of study offered by TenarisUniversity, an online learning
initiative of TenarisUniversity through edX.
Issued September 19, 2015 https://verify.edx.org/cert/c33eb70f969d4f5883ff2e59662e8685