Heavy-Section Plates for Primary Structural Frameworks
Structural steel plates form the load-bearing skeleton of oil and gas processing plants, refineries, and terminals. These heavy-section plates are used in pipe racks, equipment structures, modules, and blast-resistant buildings.
Available Standards & Grades
Standard Grades Yield Strength Range
ASTM A36 Single grade 250 MPa minimum
ASTM A572 Grade 50, 55, 60, 65 345 – 450 MPa
ASTM A588 Grade A, B, K (Weathering Steel) 345 MPa
EN 10025-2 S235, S275, S355, S450 (J0/J2/K2 options) 235 – 450 MPa
EN 10025-3 S275N/NL, S355N/NL, S420N/NL, S460N/NL 275 – 460 MPa (Normalized)
EN 10025-4 S275M/ML, S355M/ML, S420M/ML, S460M/ML 275 – 460 MPa (TMCP)
EN 10025-6 S460Q/QL, S500Q, S550Q, S620Q, S690Q/QL 460 – 690 MPa (Q&T)
Dimensional Range
- Parameter Range
- Thickness 6mm to 400mm
- Width 1500mm to 4500mm
- Length Up to 18000mm
- Condition Hot Rolled, Normalized, TMCP, Q&T
Optional Properties
- Property Specification
- Low-Temperature Toughness J0 (0°C), J2 (-20°C), K2 (-40°C), L (-50°C), QL1 (-60°C)
- Through-Thickness (Z-Quality) Z15, Z25, Z35 per EN 10164 for welded joints susceptible to lamellar tearing
- Weathering Resistance ASTM A588 (Corten equivalent). Self-protecting oxide patina for unpainted structures
- Weldability Low CEV grades available for thick sections and heavy welding
Typical Applications in Oil & Gas
- · Pipe racks and cable tray support structures
- · Process module primary and secondary steel
- · Equipment support structures (exchanger cradles, vessel skirts, column supports)
- · Blast-resistant and fire-rated buildings
- · Flare stacks, derricks, and masts
- · Compressor and turbine foundation frames
- · Helideck support structures