1. Differences in Applications
| Type | Applications | Disable Scene |
|---|---|---|
| A53 | Fluid transportation (water/gas pipelines, low-pressure oil and gas pipelines) | Structural load-bearing and pile foundation engineering |
| A252 | Building structure pile foundation (port terminal, bridge support) | Pressure pipes, high temperature equipment |
2. Comparison of core characteristics
Mechanical properties
A252:
Tensile strength 400-550MPa (higher than A53 basic level);
Focus on bending and torsion resistance, used to withstand vertical loads and lateral impacts.
A53 Gr.B:
Tensile strength ≥415MPa, yield strength ≥240MPa ;
Focus on pipeline sealing and fluid pressure bearing capacity.
Ingredients and Process
| Features | A53 | A252 |
|---|---|---|
| Material | GR.B(low carbon steel,C≤0.30%) | low carbon steel(C≤0.26%) |
| Process Type | seamless(Gr A)or welded(Gr B) | Seamless craftsmanship only |
| Surface treatment | Galvanized | Usually bare tube state |
Testing and certification
A53: mandatory water pressure test + non-destructive testing (X-ray/ultrasound);
A252: focus on testing flattening/bending performance (pile foundation anti-deformation requirements)
