GB/T 28413 ERW Steel Pipe Welded Carbon Steel Tube For Heat Exchanger
Material
GB/T 28413 specifies the requirements for Electric Resistance Welded (ERW) steel pipes, primarily used in heat exchangers. They are made from high-quality carbon steel, which provides excellent thermal conductivity and structural stability, making them ideal for the rigorous demands of heat exchanger applications.
Specification
- Standard: GB/T 28413
- Type: ERW Steel Pipe
- Outer Diameter: Usually ranges from 21.3 mm to 660 mm
- Wall Thickness: From 2.0 mm to 20.0 mm
- Length: Typically 6 m or custom lengths as required
- Ends: Plain, beveled, or threaded
- Surface Treatment: Galvanized, black or as specified
- Heat Treatment: Normalized or as required per application
Key Features
- High Strength and Durability: Ensures long-term performance.
- Good Thermal Conductivity: Ideal for efficient heat transfer applications.
- Corrosion Resistant: Enhanced lifespan in corrosive environments.
- Cost-effective: Offers a balance of performance and affordability.
- Versatility: Available in various sizes and thicknesses.
Chemical Composition
| Element | Minimum % | Maximum % |
| Carbon (C) | - | 0.20 |
| Silicon (Si) | - | 0.35 |
| Manganese (Mn) | 0.30 | 1.20 |
| Phosphorus (P) | - | 0.040 |
| Sulfur (S) | - | 0.040 |
Note: The exact chemical composition may vary slightly depending on specific grades and customer requirements.
Mechanical Properties
| Property | Value |
| Tensile Strength (MPa) | 340 to 490 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 24 |
| Impact Energy (J) | ≥ 27 at 20°C |
The mechanical properties are indicative and may be subjected to quality tests.
Steel Grade
Common steel grades for GB/T 28413 include Q195, Q215, Q235, Q345, tailored to meet varying mechanical and chemical demands. These grades provide different levels of strength and durability while maintaining compliance with industry standards.
Application
ERW steel pipes under GB/T 28413 are widely used in:
- Heat Exchangers
- Boilers
- Pressure Vessels
- Air Coolers
- Condensers
- Automotive Components
Their adaptability makes them a preferred choice in sectors such as power generation, petrochemical, and manufacturing.
Possible Alternative Grades
While GB/T 28413 covers specific requirements, alternative standards or grades can be used provided they meet performance criteria. Possible alternatives include:
- ASTM A179
- ASTM A192
- EN 10217
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