Scaffold steel tubes are the backbone of various scaffold systems, and their quality directly relates to the safety of the entire support structure. Currently, the steel tubes commonly used in construction projects are mainly divided into two categories: welded steel tubes and seamless steel tubes. The material is predominantly carbon structural steel, which is required to possess good strength, rigidity, and toughness to withstand construction loads and temporary impacts.

In terms of specifications, the outer diameter of commonly used scaffold steel tubes is typically 48.3 mm, with wall thickness generally ranging from 3.0 to 3.6 mm. The tubes should remain straight, with surfaces free from cracks, hard bends, and severe rust. The end cuts should be smooth to facilitate connections. For tubes that are reused (turnover use), visual inspection and sampling re-testing should be carried out upon arrival at the site, and tubes with deformation, cracks, or insufficient wall thickness should be eliminated to prevent substandard materials from entering the construction site.

Key points for safe selection include: first, selecting the appropriate wall thickness and spacing based on actual load calculations; second, ensuring uniformity in tube diameter and matching with connecting components to avoid insecure connections caused by mixed use; and third, applying rust prevention and regular maintenance to extend service life. Standardized tube management is an important guarantee for the long-term safe operation of scaffold systems.