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Telephone:
+86 133 2810 1989
Standards:
GB/T8163 —— China national standards
Uses:
For the seamless steel pipes for transmission of fluids
Steel pipes No. of main production:
10、20、Q345 ect.
Pipe types | Outer-caliber（D） | Thickness（S） | ||
Pipe outer-caliber(mm) | Allowable warp(mm) | Pipe thickness(mm) | Allowable warp(mm) | |
Hot-rolled pipes | ＞219 | ±1.0％ | ＞20 | ±10％ |
Standards | Steel pipes No. | Tensile strength（MPa） | Bend strength（MPa） | Elongation（％） |
GB/T8163 | 10 | 335～475 | ≥205 | ≥24 |
20 | 410～550 | ≥245 | ≥20 | |
Q345 | 490～665 | ≥325 | ≥21 |
Standards | Steel pipes No. | Chemical composition（％） | |||||||
C | Si | Mn | P | S | Cr | Ni | Cu | ||
GB/T8163 | 10 | 0.07～0.14 | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.15 | ≤0.25 | ≤0.25 |
20 | 0.17～0.24 | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | ≤0.25 | |
Q345 | 0.12～0.20 | 0.20～0.55 | 1.20～1.60 | ≤0.045 | ≤0.045 | / | / | / | |
Seamless Tubes for Fluid Transport: An Overview
Seamless tubes are integral components in industries requiring efficient and reliable fluid transport. Manufactured without any welded seams, these tubes are produced through an extrusion or rotary piercing process, resulting in a uniform structure that enhances their strength and durability.
Key Advantages:
High Pressure Resistance: The absence of welds eliminates weak points, making seamless tubes ideal for high-pressure applications.
Superior Corrosion Resistance: Uniform material composition ensures better resistance to corrosive fluids and environments.
Consistent Flow Characteristics: Smooth internal surfaces minimize friction, allowing efficient fluid flow and reducing energy consumption.
Reliability in Extreme Conditions: Suitable for high-temperature and high-stress environments, including chemical processing, oil and gas, and power generation.
Applications:
Seamless fluid tubes are widely used in:
Oil and gas pipelines
Hydraulic systems
Heat exchangers and boilers
Chemical and petrochemical plants
Automotive and aerospace industries
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