The 2019 update significantly increased the maximum allowable thicknesses for various grades: : Up to 200 mm . MLO (Thermo-mechanical) : Up to 120 mm . QLO (Quenched & Tempered) : Up to 150 mm . 3. Key Requirements and Testing
The standard is the definitive European specification for weldable structural steel plates used in the fabrication of fixed offshore structures. This standard ensures that steel materials can withstand the extreme mechanical stresses and corrosive environments of sectors like the North Sea. 1. Scope and Applications
: Infrastructure driven into the seabed. en 102251 pdf verified
: High-strength grades like S550QLO, S620QLO, and S690QLO. Thickness Limitations
: This standard does not apply to subsea pipelines, risers, or process piping. 2. Technical Specifications & Steel Grades To ensure reliability in harsh seas
: Plates used as the base material for forming larger structural tubes.
To ensure reliability in harsh seas, EN 10225-1 mandates rigorous quality controls: Weldable Structural Steels for Offshore | PDF - Scribd S355NLO (yield strength of 355 MPa).
Grades are categorized by their delivery condition and yield strength: : e.g., S355NLO (yield strength of 355 MPa).