A53 Seamless & Welded Carbon Steel Pipe Product Overview
The ASTM A53 Carbon Steel Pipe (ASME SA53 equivalent) is a versatile, dual-certified steel tubing for structural frameworks, mechanical systems, and low-pressure fluid transport (≤20 bar). Available in seamless (Type S), ERW welded (Type E), and furnace-welded (Type F) variants, it operates across temperatures from -29°C to 430°C with a 7.85 g/cm³ density and 210 GPa elastic modulus. Compliant with ASME B36.10 dimensional standards, it serves as a cost-efficient alternative to A106 and API 5L pipes in non-critical steam, water, and gas networks.
Key Technical Specifications
1. Dimensional & Manufacturing Properties
- Size Range:
- Seamless (Type S): 6.35 mm (¼”) – 914 mm (36″) OD | Wall Thickness: 1.25–50 mm
- Welded (Type E/F): 21.3–3,620 mm OD | Wall Thickness: 1.65–65 mm
- Tolerances:
- OD: ±1.0% (seamless), ±1.5% (welded)
- Wall Thickness: ±12.5% (standard), ±10% (schedules 80–160)
- Surface Finishes:
- Black Bare: Mill scale retained (emissivity: 0.85–0.95)
- Hot-Dip Galvanized: Zinc coating ≥610 g/m² (Type G)
2. Mechanical & Chemical Performance
Chemical Composition:
| Grade | C | Mn | P≤ | S≤ | Cu | Cr+Mo+V |
|---|---|---|---|---|---|---|
| Grade A | ≤0.25% | ≤0.95% | 0.05% | 0.05% | ≤0.40% | ≤0.93% |
| Grade B | ≤0.30% | ≤1.20% | 0.05% | 0.05% | ≤0.40% | ≤0.93% |
Mechanical Properties:
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| A | ≥330 | ≥205 | ≥25 | ≤137 |
| B | ≥415 | ≥240 | ≥23 | ≤159 |
Thermal & Electrical Properties:
- Thermal Conductivity: 51 W/m·K (20°C) → 179 W/m·K (450°C)
- Resistivity: 0.20 Ω·mm²/m (20°C)
- Heat Capacity: 461 J/kg·K
Applications by Industry
| Industry | Use Case | Grade Preference | Key Benefit |
|---|---|---|---|
| Construction | Structural columns, scaffolding | Grade A (ASME SA53) | 30% cost savings vs. A500 |
| Oil & Gas | Low-pressure gas gathering lines | Grade B (Type S) | API 5L X42 equivalence |
| HVAC | Steam condensate return systems | Galvanized Type E | 15–20-year corrosion resistance |
| Water Treatment | Underground water mains | Type F (Grade B) | Burst pressure ≥60 bar |
| Renewables | Wind turbine grounding conduits | Type S (Grade B) | Resistivity ≤0.25 Ω·mm²/m |
Global Standard Equivalents
| USA (ASTM) | Europe (EN) | Japan (JIS) | China (GB) |
|---|---|---|---|
| A53 Grade B | EN 10216-1 P235 | STKM 12C | GB/T 8163 |
| ASME SA53 | EN 10255 | STPG 370 | GB/T 3091 |
Certifications & Compliance
- Pressure Ratings: ASME B31.1 (Power Piping), B31.3 (Process Piping)
- Certifications: ISO 9001, PED 2014/68/EU, NACE MR0175 (Sour Service)
- Traceability: Heat-specific MTCs with PMI (Positive Material Identification)
Packing And Delivery
