Henan Aifite Intelligent Equipment Co., LTD.
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Lifting Beam for Handling Square Steel Pipe
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Product Introduction
When lifting square steel pipes in steel plants, the lifting beams must be designed for heavy loads, have anti-deformation features, and be protected against high temperatures to ensure safe and efficient operation.
Beam: Select Q355 high-strength steel (yield strength 355 MPa, Abstract 7) or low-carbon alloy structural steel (About 4), which offer excellent weldability and wear resistance.
Chain: G80/G100 grade alloy steel (breaking strength 800/1000 MPa, Abstracts 1 and 11). Hot-dip galvanized chain is used in humid environments for corrosion resistance.
High-temperature adaptability: When lifting steel pipes at temperatures ≥ 800°C, the beam requires ceramic coating (About 5), and the chain should be made of Inconel 625 high-temperature resistant alloy (temperature resistance 1000°C).
Key Structural Design Points
Forced Synchronization of Multiple Lifting Points
Use a lifting point layout of m rows and n columns (e.g., 3×3) with a turnbuckle adjustment device (Abstract 1). During pre-lifting (50mm lift), adjust the chain length to ensure that all lifting points are taut (load deviation ≤±5%). For example, a 12-meter steel pipe is lifted using a four-point box-type lifting beam. Turnbuckles eliminate local overload caused by "empty lifting."
Box Structure Reinforcement
The beam body is a welded box-type structure (Abstract 7), with upper and lower flange thicknesses ≥ 20mm and web thickness ≥ 16mm. Internal reinforcement ribs (spacing ≤ 30cm) increase bending deformation resistance by 60%. Lifting lugs are made of 42CrMo alloy steel and are inspected (UT/MT) after welding to the beam body.
Wear and Anti-Slip Design
Steel corner guards and rubber pads (thickness ≥ 10mm, Abstract 5) are installed at the contact point between the hook and the steel pipe to prevent slippage and localized wear of the steel pipe during lifting (wear rate is reduced by 80%).
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Weizhuang, Changyuan，Xinxiang city, Henan province, China