ASTM A106 Grade B Seamless Carbon Steel Pipe for High-Temperature Applications
1. Definition: ASTM A106 Grade B Seamless Carbon Steel Pipe is a type of high-temperature service pipe that is manufactured to meet the standards outlined in ASTM A106. This grade of pipe is designed for use in high-temperature applications where the temperature can exceed 500°F (260°C). The seamless construction ensures a uniform internal and external surface without any weld seams.
2. Advantages:
- Uniformity: Seamless pipes offer a consistent wall thickness and superior surface finish.
- High-Temperature Resistance: Suitable for applications where temperatures are significantly high.
- Pressure Resistance: Capable of withstanding high internal pressures.
- Longevity: Designed for long-term use in demanding environments.
- Corrosion Resistance: Provides resistance to corrosion in various industrial environments.
- Wide Availability: Commonly available in a range of sizes and lengths.
3. Product Parameters:
| Parameter | Description |
| Standard | ASTM A106 Grade B |
| Material | Seamless Carbon Steel |
| Size Range | Various diameters and wall thicknesses according to ASTM A106 |
| Length | Typically 20 feet (6.1 meters), but can be customized |
| Ends | Plain ends, beveled ends, or threaded ends |
| Surface Treatment | As per customer requirements |
4. Applications:
- Boiler and Superheater Tubes: Used extensively in power plants and boilers.
- Heat Exchangers: Employed in heat exchanger systems where high-temperature fluids are processed.
- Refineries: Suitable for various high-temperature processes in oil refineries.
- Chemical Processing Plants: Utilized in chemical plants for high-temperature chemical reactions.
- Petrochemical Plants: Ideal for pipelines and equipment in petrochemical industries.
5. Mechanical Properties:
| Property | Requirement |
| Tensile Strength | ≥485 MPa (70,000 psi) |
| Yield Strength | ≥240 MPa (35,000 psi) |
| Elongation | ≥20% in 8 in (200 mm) or in 50 mm (2 in) for pipes ≤ 3 in (75 mm) in diameter |
| Hardness | Rockwell B 90 maximum (for pipes ≤ 2 in (50 mm) in diameter) |
6. Chemical Composition:
| Element | Typical Range (%) |
| Carbon | 0.29 - 0.36 |
| Manganese | 0.35 - 0.65 |
| Phosphorus | ≤ 0.035 |
| Sulfur | ≤ 0.035 |
| Silicon | ≤ 0.35 |
7. Heat Treatment: ASTM A106 Grade B pipes are heat treated to ensure they meet the mechanical property requirements and to enhance their ductility and toughness.
Conclusion: ASTM A106 Grade B Seamless Carbon Steel Pipe is a reliable choice for high-temperature applications, offering a combination of strength, ductility, and corrosion resistance. Its seamless design and adherence to ASTM A106 standards make it suitable for a wide range of industrial applications where high temperatures are a critical factor.
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