The EN 10225-1:2019 standard is the primary European regulatory document governing the technical delivery conditions for weldable structural steel plates used in the fabrication of fixed offshore structures. This standard is critical for ensuring the structural integrity of offshore platforms, particularly in the demanding environments of the North Sea. Overview of EN 10225-1:2019
The 2019 edition of EN 10225-1 officially supersedes the older EN 10225:2009 standard. While the previous version was a single consolidated document, the current series is divided into four distinct parts: Part 1: Steel plates. Part 2: Steel sections. Part 3: Hot finished hollow sections. Part 4: Cold formed welded hollow sections. Technical Specifications for Steel Plates
According to technical data from ArcelorMittal Projects, the 2019 standard introduced several key changes to thickness limits and material designations: Steel Grade Series Delivery Condition Max Thickness (2019) S355NLO Normalized (+N) Up to 200 mm S355MLO to S500MLO Thermomechanical (+M) Up to 120 mm S420QLO to S690QLO Quenched & Tempered (+Q) Up to 150 mm Key Requirements Offshore steels EN 10225: Requirements, NORSOK and options en 102251 pdf
EN 10225-1:2019 is a European Standard that specifies the technical delivery conditions for plates, strips, and bars made of weldable fine-grain steels with high yield strength in the quenched and tempered condition. The standard is crucial in the manufacturing of structural steel components for various applications, including offshore platforms, wind farms, bridges, and high-rise buildings. Here’s an informative overview:
Step 1 – Preparation
- Clean sample (no oil, dust)
- Stabilize at 23±5°C for 2 hours
- Mark measurement grid on sheet
Step 2 – Thickness & Width
- Use calibrated micrometer (0.001 mm)
- Measure at 5 points across width, 10 points along length
Step 3 – Burr & Edge Quality
- Place sheet on granite plate
- Run dial indicator along edge at 45° angle
- Record max burr height
Step 4 – Flatness (Wave/Buckle)
- Clamp sheet at one end on flat table
- Insert feeler gauge under wave peak
- Record height & span length
Step 5 – Documentation
- Compare to specified tolerances (e.g., IEC 60404-9)
Calculate Cpk if required by customer
EN 10225 is particularly relevant for projects that require high-performance piping and hollow sections, such as: The EN 10225-1:2019 standard is the primary European
The standard limits heat input (typically ≤ 5.0 kJ/mm for S355G). Your WPS must qualify using CTOD tests per EN 10225 Annex A.
If a client or auditor asks to see your "EN 10251 test reports," and you hand them a document labeled "EN 102251," they will reject it immediately. Here is why: Use calibrated micrometer (0