The 2019 revision restructured the single EN 10225:2009 standard into four dedicated parts. Part 1 isolates heavy steel plates, separating them from sections and hollow profiles. The update introduced significantly stricter technical demands to support more advanced offshore engineering designs: Technical Parameter EN 10225:2009 Edition EN 10225-1:2019 Edition (Part 1) Combined plates, sections, and tubes. Part 1 explicitly regulates plates only . Maximum Thickness Up to 150 mm for standard normalized grades. Extended up to 200 mm for S355NLO. Impact Test Direction Split between longitudinal and transverse. Mandatory transverse orientation for all plates. Ultrasonic Testing (UT) Varied by group classification (e.g., S0/E1 or S1/E2). Default baseline raised to EN 10160 Class S0/E1 . Carbon Equivalent (CEV) Less stringent maximum limits per grade.
The monopiles, transition pieces, and jacket foundations holding massive wind turbines in the North Sea and Atlantic Ocean rely entirely on the fatigue-resistant and low-temperature tolerant properties defined by this rigorous European standard.
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Steels certified under this standard must maintain strict control over residual trace elements to optimize weldability under freezing field conditions. Lowered carbon ceilings prevent local brittle zones from forming in the Heat Affected Zone (HAZ) during structural welding operations. Weldable Structural Steels for Offshore | PDF - Scribd
Understanding EN 10225-1:2019 Plates – The Verified Technical Standard for Offshore Structural Steels The 2019 revision restructured the single EN 10225:2009
(Weldable structural steels for fixed offshore structures) is a European Standard that covers technical delivery conditions for steel plates, sections, and hollow sections used in the construction of fixed offshore structures.
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Tight control over carbon and alloy elements to ensure weldability.
In the demanding world of offshore engineering, material failure is not an option. Fixed offshore structures, such as oil rigs, wind turbine foundations, and platforms, require steel that can withstand extreme environmental conditions, severe fatigue, and complex welding requirements. The European standard has long been the benchmark for these requirements.
If you need help navigating the technical layout of this standard, let me know: Part 1 explicitly regulates plates only
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