ASTM A252 LSAW Steel Pipe

ASTM A252 is a standard specification for welded steel and seamless steel pipe piles developed by the American Society for Testing and Materials (ASTM). The following is a detailed introduction to the standard:

Scope of application

Application: Mainly used for deep foundation engineering, such as bridge pile foundation, high-rise building foundation, port terminal support, etc.

- Pipe diameter and wall thickness:

- Nominal pipe diameter (NPS): Usually NPS 8 to 142 (about 219mm to 3620mm), refer to ANSI B36.10 for specific dimensions.

- Wall thickness: adjusted according to design requirements, the common range is 6mm to 25mm.

Application scenarios

- Bridge engineering: as the main pier pile foundation, supporting the weight of the bridge structure.

- High-rise buildings: used for soft soil foundation reinforcement to provide stable support.

- Port terminals: withstand the impact of docking ships and wave erosion, and need to take into account both strength and corrosion resistance.

- Water conservancy projects: dam reinforcement, hydropower station infrastructure construction, etc.

Manufacturing process and quality control

- Production process:

1. Raw material inspection: The chemical composition and mechanical properties of the steel strip must meet the requirements of ASTM A252.

2. Forming and welding: The steel strip is formed by a spiral plate rolling machine and welded by submerged arc welding (SAW) or high frequency welding (HFW). The welds must pass X-ray flaw detection.

3. Dimension calibration: Control the outer diameter and wall thickness tolerances (such as outer diameter deviation ±0.5%, wall thickness deviation ±10%).

4. Performance testing: Conduct water pressure test (pressure ≥ 1.5 times the design pressure), tensile test, bending test, etc.

- Anti-corrosion treatment:

The surface rust removal level must reach Sa2.5 (near white level), and the coating thickness is selected according to environmental requirements (such as 3PE coating thickness ≥ 2.5mm).

 

ASTM A252 LSAW steel pipe

 

GNEE Group produces 50 tons of A252 piles per month

A252 Pipe piles

A252 cylindrical pipe pile

ASTM A252 tubular pile pipe

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