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 /  / Certifications & approvals

Certifications & approvals

Please note that certificates issued before October 2017 still carry our former company name and will maintain their validity even after the renaming of our company.

Certifications integrated management system

Other certifications


Our products have been approved by renowned customers from the oil and gas industry, e.g.:

  • Aramco
  • ENI
  • Exxon-Mobil
  • Fluxys
  • Gascade
  • Gasunie
  • Gaz System
  • GRTgaz
  • Kinder Morgan
  • National Grid
  • Open Grid Europe
  • Pemex
  • RWE
  • Snam Retegas
  • TIGF


Dr.-Ing. Brahim Ouaissa

Dr.-Ing. Brahim Ouaissa
Head of Department Quality Management and Application Technology

Phone: +49 5341 21-2855
Fax: +49 5341 21-4929

© Mannesmann Grossrohr GmbH
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