GB/T 8163 Grade 10# and 20# Seamless Steel Pipes for Conveying Liquids:
Product Description: GB/T 8163 Grade 10# and 20# Seamless Steel Pipes are designed for the conveyance of liquids in various industrial applications. These pipes are manufactured in accordance with the Chinese national standard GB/T 8163, which specifies the requirements for seamless steel pipes suitable for transporting liquids, including water, oil, and gas. The pipes are made from low carbon steel, with the '10#' and '20#' grades indicating the steel's carbon content, which affects the strength and weldability of the pipes.
Product Parameter Specifications:
Parameter | Specification | Units |
Standard | GB/T 8163-2018 | - |
Grade | 10#, 20# | - |
Outer Diameter | Ranges from 6mm to 219mm depending on the specific application | mm |
Wall Thickness | Varies with diameter; specific range per product specification | mm |
Length | Typically 4-12m, customizable based on requirements | m |
Tolerance | As per GB/T 8163-2018 for diameter and wall thickness | - |
Product Applications:
- Water Supply Systems: Utilized in municipal and industrial water supply systems for clean water conveyance.
- Oil and Gas Industry: Suitable for transporting oil, natural gas, and petroleum products.
- Chemical Industry: Employed in the transportation of corrosive or high-temperature liquids.
- Agricultural Irrigation: Used for efficient water delivery in irrigation systems.
- Fire Protection Systems: Ideal for fire sprinkler systems and water supply in emergency response.
Types of GB/T 8163 Seamless Steel Pipes:
- Grade 10#: General-purpose low carbon steel pipes suitable for low to medium pressure liquid conveyance.
- Grade 20#: Low carbon steel pipes with slightly higher carbon content, offering improved strength for medium pressure applications.
Mechanical Properties:
Property | Typical Range/Value for Grade 10# and 20# | Units |
Tensile Strength | 340-510 MPa (10#), 410-590 MPa (20#) | MPa |
Yield Strength | ≥ 205 MPa (10#), ≥ 245 MPa (20#) | MPa |
Elongation | ≥ 22% (for both grades) | % |
Chemical Composition:
Element | Typical Range (%) for Grade 10# and 20# |
Carbon (C) | 0.07-0.13 (10#), 0.17-0.23 (20#) |
Manganese (Mn) | 0.35-0.65 (10#), 0.35-0.65 (20#) |
Phosphorus (P) | ≤ 0.035 (10#), ≤ 0.035 (20#) |
Sulfur (S) | ≤ 0.035 (10#), ≤ 0.035 (20#) |
Note: The specific mechanical properties and chemical composition can vary based on the manufacturing process and the specific requirements of the application. It is essential to consult the manufacturer's technical documentation for precise specifications and to ensure compatibility with the intended application.


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