GB/T8163 Seamless Pipe Manufacturer

GB/T 8163 is a Chinese standard for seamless steel pipes used in liquid service. These pipes are made from carbon steel and alloy steel, with common grades including 10, 20, Q345, Q390, Q420, and Q460. The standard covers a wide range of dimensions, with outside diameters ranging from 13.7 to 1200 mm and wall thicknesses from 2 to 100 mm.

The chemical composition and mechanical properties vary by grade. For example, Grade 20 has a carbon content of 0.17 – 0.23%, a tensile strength of 410 – 530 MPa, and a minimum yield strength of 245 MPa. The standard also includes requirements for manufacturing methods, such as hot rolling or cold drawing, and specifies delivery conditions, tolerances for dimensions and weight, and testing methods.

Types of GB/T8163 Standard Seamless Steel Pipe

Line Pipe

Material Grades of GB/8163 pipes

GB/T 8163 covers seamless steel tubes for fluid transport, with common material grades including 10, 20, Q295, Q345, 16Mn, 09MnV, 12CrMo, 15CrMo, and 1Cr5Mo. These grades are selected based on application requirements, such as pressure and temperature conditions.

Chemical Composition of GB/8163 pipes

The chemical composition varies by grade. For example, Grade 10 contains ≤0.17% C, 0.17–0.37% Si, and 0.35–0.65% Mn, while Grade Q345 includes ≤0.20% C, ≤0.55% Si, and 1.00–1.60% Mn, with trace alloying elements like V, Nb, or Ti.

Mechanical Properties of GB/8163 pipes

Mechanical properties depend on the grade. Grade 10 has a tensile strength of ≥335 MPa and elongation of ≥24%, while Grade Q345 offers 470–630 MPa tensile strength and ≥21% elongation. These properties ensure durability and performance in fluid transport applications.

Advantages of GB/T8163 Seamless Steel Pipe

GB/T 8163 seamless tubes offer high strength, excellent durability, and superior resistance to pressure and corrosion. Their seamless construction ensures leak-proof performance, making them ideal for demanding fluid transport applications in harsh environments.

Applications of GB/T8163 Seamless Steel Pipe

These tubes are widely used in industries such as oil and gas, petrochemicals, boilers, and machinery for transporting water, oil, gas, and other fluids. They are also employed in structural applications requiring high reliability and performance.

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