GB/T6479 Q345D High-Pressure Fertilizer Seamless Steel Pipes/Tubes
Product Description: GB/T6479 Q345D Fertilizer Seamless Steel Pipes/Tubes are precision-engineered seamless tubes designed specifically for use in the fertilizer industry. These tubes are manufactured according to the Chinese national standard GB/T6479, which sets forth the requirements for seamless steel tubes suitable for high-pressure applications. The Q345D grade signifies a high-strength, low-alloy steel that is well-suited for applications requiring structural integrity and resistance to high pressures.
Advantages:
- Seamless Design: The seamless construction of these tubes eliminates the potential for leaks and failures at the welds, providing a more reliable and durable product.
- High-Pressure Capability: The Q345D grade offers excellent strength and pressure resistance, making these tubes ideal for use in high-pressure fertilizer production processes.
- Corrosion Resistance: Formulated with enhanced corrosion resistance to withstand the chemical environments common in fertilizer manufacturing.
- Dimensional Accuracy: These tubes are manufactured with tight tolerances to ensure consistent quality and fit.
- Long Service Life: The combination of strength, corrosion resistance, and precision manufacturing results in a product with a long operational lifespan.
Mechanical Properties
| Property | Typical Range or Value | Unit |
| Tensile Strength | 470-630 | MPa |
| Yield Strength | ≥ 345 | MPa |
| Elongation at Break | 21-25 | % |
| Hardness | Varies by application | HB |
| Impact Energy | ≥ 27 (at 20°C) | J/cm² |
Chemical Composition
| Element | Typical Range or Max Value | Unit |
| Carbon (C) | 0.18-0.23 | % |
| Manganese (Mn) | 1.0-1.60 | % |
| Silicon (Si) | ≤ 0.55 | % |
| Phosphorus (P) | ≤ 0.035 | % |
| Sulfur (S) | ≤ 0.035 | % |
| Chromium (Cr) | Optional, varies | % |
| Nickel (Ni) | Optional, varies | % |
| Molybdenum (Mo) | Optional, varies | % |
Outer Diameter Tolerances
| Diameter Range | Tolerance |
| ≤ 76 mm | ± 0.5 mm |
| > 76 mm to ≤ 114 mm | ± 0.8 mm |
| > 114 mm to ≤ 140 mm | ± 1.0 mm |
| > 140 mm | ± 1.5 mm |
Uses:
- Fertilizer Industry: Primarily used in the construction and maintenance of high-pressure pipelines within fertilizer production facilities.
- Chemical Processing: Suitable for other chemical processes that involve the handling of corrosive substances under pressure.
- Petrochemical Industry: Can be utilized in the petrochemical sector for the transportation of chemicals and other substances under high pressure.
- Industrial Equipment: Employed in various types of industrial equipment that operate under high pressure, such as pumps, compressors, and reactors.
- Structural Components: Due to their strength and durability, these tubes can also serve as structural components in heavy machinery and construction projects.
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