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Offshore Construction

Cost-effective and safe solutions to withstand extremes

Offshore structures require materials that can withstand fierce storms and climate extremes. Cost-effectiveness, easy maintenance and safety are further requirements to compete in this challenging environment. Therefore: Vallourec offers material with durability and strength which is qualified according to international offshore standards and codes.

Outstanding weldability
Eeasy to use, good surface condition
Customized solutions
Tubular solutions built to your specifications and needs
Safe, strong, even in specific climates and sea conditions

Designed to resist, our tubular solutions are used for new offshore constructions as well as for repair demands. 

Fixed platforms, vessels & ships  

  • Superstructures
  • Frame structures
  • Crew housing
  • Helicopter decks
  • Flare booms
  • Stressed boom joints
  • Drilling and Support Modules
  • Utilities / Process systems

Fixed and floating Wind Turbines & Substations

  • Boatlandings 
  • Service decks
  • J-Tubes 

Subsea Equipment

  • Processing and boosting systems
  • Manifolds
  • Trees 
  • Active pipeline supports
  • ROV operated bending tools
Our Products

The challenge of an offshore environment

Thanks to our extensive experience and R&D capabilities in offshore environments we offer a wide range from carbon to innovate premium grades. 
Our seamless tubes and hot formed hollow sections in round, square and rectangular are ultra-resistant and meet yield strength up to 890 MPa and toughness down to -60°C. With these specific properties our grades contribute to a major success factor: the efficient weldability. 
The wide range of our dimensional product portfolio ensures the highest freedom for offshore designers on the market. Along with tight wall thickness tolerances it ensures weight limitations and excellent fabrication. If needed, also special shapes can be delivered.

Grades & Sizes

Our special grade family for offshore construction is called Oceanfit®. It provides excellent weldability and exceeds the requirements of API 5 L/ISO 3183 and EN 10225. Tailor-made to your specifications, it is available in different grades and norms:  

Oceanfit® 355

Grade B/C, Grade 6, X42, X42N, X46, X46N, X52, X52N, X52Q, L360N, L360Q, S355NHHO, S355NLHHO, S355QLHHO, VL A36, D36, E36, AH 36, DH 36, EH 36, Y22, Y27

Oceanfit® 420

X60N, X60Q, L415N, L415Q, S420QLHHO, VL A420, D420, E420, VL AO420, DO420, EO420, AQ 43, DQ 43, EQ43, Y32, Y37

Oceanfit® 460

X65N, X65Q, L450N, L450Q, S460QLHHO, VL A460, D460, E460, VL AO460, DO460, EO460, AQ47, DQ 47, EQ47, Y42, Y47

Oceanfit® 500 / 550

X75Q / X80Q, L520Q / L555Q, S500QLHHO / S550QLHHO, VL A500, D500, E500, VL AO500, DO500, EO500, VL A550, D550, E550, VL AO550, DO550, EO550, AQ 51, DQ51, EQ51, AQ 56, DQ56, EQ56, Y52, Y57

Oceanfit® 620 / 690

X90Q / X100Q, L620Q / L690Q, S620QLHHO / S690QLHHO, VL A620, D620, E620, VL AO620, DO620, EO620, VL A690, D690, E690, VL AO690, DO690, EO690, AQ 63, DQ 63, EQ63, AQ 70, DQ 70, EQ70

Oceanfit® 770


Oceanfit® 890

VL A890, D890, E890, AQ 91, DQ 91, EQ 91

Documents and Resources
Our Role in Offshore Wind
Customer Story
X100 steel grade – Oceanfit®-series
  “The Vallourec’s X100 approval enlarges its Oceanfit®-series and opens up new business opportunities. After about one and a half years, more than 1000 test samples and appropriate welding tests that were carried out, Vallourec successfully received the American Bureau of Shipping approval for construction tubes in X100 steel grade produced in a Group’s rolling mill in Düsseldorf, Germany.”
Oceanfit® offshore grades certifications
“Vallourec's Oceanfit® offshore grades have just been certified by the internationally recognized classification societies Det Norske Veritas Germanischer Lloyd (DNV GL) and the American Bureau of Shipping (ABS).”