Product Description: GB/T 8163 Carbon Seamless Steel Pipes are designed for the transportation of various liquids, including water, oil, and gas. These pipes are manufactured in accordance with the Chinese national standard GB/T 8163, which specifies the requirements for seamless steel pipes suitable for high-pressure fluid service. The seamless construction ensures a uniform material structure, providing superior strength and resistance to leakage compared to welded pipes.
Product Parameter Specifications:
| Parameter | Specification | Units |
| Standard | GB/T 8163-2018 | - |
| Grade | 10, 20, Q345B, 16Mn, L245, L290M, L360M, L415M, L485M, etc. | - |
| Outer Diameter | Ranges from 6mm to 630mm depending on the specific application | mm |
| Wall Thickness | Varies with diameter and pressure requirements | mm |
| Length | Typically 4-12m, customizable based on project requirements | m |
| Tolerance | As per GB/T 8163-2018 for diameter and wall thickness | - |
Product Applications:
- Oil and Gas Industry: Used for the transportation of oil, natural gas, and petroleum products.
- Water Supply Systems: Suitable for high-pressure water pipelines and distribution networks.
- Chemical Industry: Employed in the transportation of corrosive or high-temperature fluids.
- Municipal Infrastructure: Utilized in urban water supply, sewer systems, and drainage projects.
- Industrial Plants: Ideal for the internal fluid transport systems of various industrial facilities.
| Chemistry Composition |
| C, % | Si, % | Mn, % | Cr, % | Ni, % | S, % | P, % | Cu, % | Mo, % | | 0.20 max | 0.50 max | 1.70 max | 0.30 max | 0.50 max | 0.035 max | 0.035 max | 0.30 max | 0.10 max | |
| Mechanical Properties |
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % | | 470~630 | 345 min | 20 min | |
| Order should include standard, product name, steel grade, size, quantity (total weight or total length), delivery condition, special requirements. |
| Outside Diameter & Tolerance |
| Type of Steel Pipes | Allowable Deviation | | Hot Rolled Steel Pipe | ±1%D or ±0.5, whichever is greater | | Thermal Expansion Steel Pipe | ±1%D or ±0.5, whichever is greater | | Cold Drawn Steel Pipe | ±0.75%D or ±0.3, whichever is greater | | Cold Rolled Steel Pipe | ±0.75%D or ±0.3, whichever is greater | |
| Wall thickness & Tolerance |
| Type of Steel Pipes | Outside Diameter, D | S/D | Allowable Deviation | | Hot Rolled Steel Pipe | ≤102mm | - | ±12.5%S or ±0.40mm, whichever is greater | | >102mm | ≤0.05 | ±15%S or ±0.40mm, whichever is greater | | >0.05~0.10 | ±12.5%S or ±0.40mm, whichever is greater | | >0.10 | +12.5%S/-10%S | | Thermal Expansion Steel Pipe | - | +17.5%S/-12.5%S | |
| Type of Steel Pipes | Wall Thickness, S | Allowable Deviation | | Cold Drawn Steel Pipe | ≤3 | +15%S/-10%S or ±0.15mm, whichever is greater | | >3~10 | +12.5%S/-10%S | | >10 | ±10%S | | Cold Rolled Steel Pipe | ≤3 | +15%S/-10%S or ±0.15mm, whichever is greater | | >3~10 | +12.5%S/-10%S | | >10 | ±10%S | |
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