Ultra large steel components

Extra-large steel components refer to special steel structure products that have significantly larger size and weight than conventional steel structural parts, with high integration and high technical complexity. They are usually used in major projects or high-end equipment that bear key loads and realize complex functions. Their core characteristics are the combination of "extra-large scale" and "high precision", which require special manufacturing, transportation and installation processes to achieve.

Key Features

• High Structural Complexity: Mostly designed as "special-shaped + integrated", often integrating multiple structures such as beams, columns, connecting plates and reinforcing ribs. Some also need pre-installed pipelines and embedded parts, requiring a balance of strength, stiffness and spatial layout;
• High Manufacturing Difficulty: Rely on extra-large processing equipment (such as CNC plasma cutting machines, 10,000-ton presses, large-scale submerged arc welding machines), with large welding volume (the weld length of a single part can reach hundreds of meters). Strict control of welding deformation is required (such as adopting pre-deformation and segmented welding processes);
• Transportation and Installation Restrictions: Restricted by road and bridge bearing capacity (needing to check the load of infrastructure along the way), transportation tools (mostly using axial flatbed trucks and specialized ships) and hoisting equipment (needing 1,000-ton crawler cranes/truck cranes). It is necessary to plan the full-process plan of "manufacturing-transportation-installation" in advance;
• Strict Quality Requirements: As core load-bearing components of projects, they need to pass non-destructive testing (UT ultrasonic testing, MT magnetic particle testing) and mechanical property tests (tensile and impact tests). Some also need to meet special requirements such as fatigue resistance and corrosion resistance (e.g., weathering steel components for marine engineering).

Application Fields

Heavy Equipment Manufacturing: Steel shells for nuclear power pressure vessels, wind turbine main frames, shield machine cutter head supports. They bear key equipment loads and resist high temperature, high pressure and strong impact.
Construction Engineering: Core columns of super high-rise steel structures, steel trusses for large-span venues, giant steel supports. They support the main structure of buildings and realize large-space and super-high design.
Transportation Engineering: Steel box girders/steel truss girders for bridges, ship deck sections, high-speed rail platform steel structures. They bear traffic loads (vehicle/ship dead weight + dynamic loads).
Energy and Chemical Industry: Wall plates of large oil and gas storage tanks, steel frames for thermal power boilers, supports for chemical reaction towers. They resist medium corrosion and high-temperature working conditions and ensure stable operation of equipment.