Leading expert in industrial sealing technology since 1947, SIEM SUPRANITE has developed technical solutions satisfying the toughest customers’ requirements covering a complete range of fluid applications as well as high temperature applications.

We manufacture gasket sheets, braided packings and expanded graphite seals bearing the SUPRANITE and FLEXITALLIC ® brand names, with an extensive choice of qualities to ensure reliable sealing of pressure vessels (heat exchangers, reactors, valves, tanks, mixers, etc), bolted assemblies..

We support our customers through our presence, our expertise, our advices as well as providing sealing solutions.

We also prepare plant shutdowns in France and Abroad as well as on-site trainings via our technical and logistic support. We work for all types of industries including Oil & Gas, Refining and Petrochemical. For more than 30 years, we are one of the main suppliers of major players in the Petrochemical (TOTAL, EXXON, SHELL…) and Power Sector (EDF).

Ever since FLEXITALLIC® invented the spiral-wound gasket in 1912, there has been a constant search for solutions to the toughest problems, with extensive R&D support to bring you the best developments and to promote innovative products.

We can offer you our expertise and recommendations with our technical studies issued by our engineering team including: Reliability development (gasket calculations), Compliance Calculations, Design Codes (ASME, PVRC, EN1591,…), Best practices for tightening and torque calculations.

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