GB/T 6479 Q345E Seamless Steel Pipes/Tubes For High-Pressure Fertilizer
GB/T 6479 Q345E Seamless Steel Pipes/Tubes are high-quality seamless tubes designed for use in the high-pressure fertilizer industry. These pipes are manufactured in accordance with the Chinese national standard GB/T 6479, which specifies the technical requirements for seamless steel tubes suitable for high-pressure applications. The Q345E grade indicates a specific strength level and quality, making these tubes ideal for applications requiring high-pressure resistance and structural integrity.
Advantages:
- High Pressure Resistance: Designed to withstand high internal pressures, making them suitable for fertilizer production where high pressures are common.
- Seamless Construction: The seamless design eliminates the risk of leakage at the welds, providing a more reliable and safer option for high-pressure applications.
- Chemical and Corrosion Resistance: Formulated to resist the corrosive effects of fertilizer chemicals, ensuring a longer service life.
- High Strength: The Q345E grade offers a balance of strength and toughness, which is crucial for maintaining pipe integrity under pressure.
- Precision Dimensions: Manufactured to precise dimensions to ensure a perfect fit and ease of installation.
| Chemistry Composition |
| C, % | Si, % | Mn, % | P, % | S, % | Cu, % | Cr, % | Ni, % | Nb, % | Mo, % | V, % | | 0.12-0.20 | 0.20-0.50 | 1.20-1.70 | 0.025 max | 0.015 max | 0.20 max | 0.30 max | 0.50 max | 0.07 max | 0.10 max | 0.15 max | |
| Mechanical Properties |
| Tensile Strength , MPa | Yield Strength, MPa | Elongation, % | Impact (KV2)/J at 20℃ | | 490-670 | 345 min | 21 min | 40 (OD≥76mm & WT≥6.5mm) | |
| Outside Diameter & Tolerance |
| Hot Rolled | Outside Diameter, mm | Tolerance | | OD≤159 | +1% or +0.50mm | | OD>159 | | Cold Drawn | Outside Diameter, mm | Tolerance | | Ordinary | Advanced | | OD≤30 | ±0.20mm | ±0.15mm | | 30＜OD≤50 | ±0.30mm | ±0.25mm | | OD>50 | ±0.50% | ±0.50% | |
| Wall thickness & Tolerance |
| Hot Rolled | Outside Diameter, mm | Tolerance | | OD≤159 | +12.5%/-10% or +0.50mm/-0.40mm | | OD>159, WT/OD≤0.05 | +15%/-10% | | OD>159, 0.05＜WT/OD≤0.10 | +12.5%/-10% | | OD>159, WT/OD>0.10 | ±10% | | Cold Drawn | Wall Thickness, mm | Tolerance | | Ordinary | Advanced | | WT≤2.0 | +12.5%/-10% | ±10% | | WT>2.0 | ±10% | ±7.5% | |
Uses:
- Fertilizer Production Plants: Utilized in the piping systems of plants that produce fertilizers, where high pressures are necessary for the mixing and processing of materials.
- Chemical Industry: Suitable for other chemical processes that require the transportation of materials under high pressure.
- Oil and Gas Industry: Can be used in applications within the oil and gas sector where high-pressure pipelines are required.
- Industrial Equipment: Employed in various pieces of industrial equipment that operate under high pressure, such as reactors and heat exchangers.
- Structural Applications: Due to their strength, these tubes can also be used in structural applications where high-pressure resistance is needed.
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