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Hebei haihao high pressure flange & pipe fitting group was established in 1982, located in Mengcun County the hometown of pipe fittings in China.

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GB/T8163 Seamless steel tubes pipes for liquid service

1)GB/T8163 Seamless Pipe Sizes (O.D. x W.T):21.3 mm-914mm x 2m-60m 2)Standard:GB/T8163 3)GB/T8163 Seamless Pipe Steel Grade:20#,16MN,Q345B 4)Surface:oiled or black painted to prevent rust 5)Marking:as per customer’s requirement Inner packing:Caps on two ends of every pipe Outer packing: Hexagonal shape bundles wrapped with strong steel trip or according to customers’requests.

Diamensional Tolerances Of GB/T8163 Seamless Pipe

Types of steel tubes Outer diameter Wall thickness
Cold-rolled tubes Tube sizes(mm) Tolerances(mm) Tube sizes (mm) Tolerances(mm)
  >30~50 ±0.3 ≤30 ±10%
  >50~219 ±0.8%    
Hot-rolled tubes >219 ±1.0% >20 ±10%

Mechanical Properties Of GB/T8163 Seamless Pipe

Standard codes Models of steel tubes Tensite strength(MPa) Yield strength(MPa) Elongation(%)
GB/T8163 10 335~475 ≥205 ≥24
20 410~550 ≥245 ≥20
Q345 490~665 ≥325 ≥21

Chemical Composition Of GB/T8163 Seamless Pipe

Standard codes Models of steel tubes Chemical compositions(%)
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 / / /

GB/T8163Seamless steel tubes pipes for liquid service

GB/T8163Seamless steel tubes pipes for liquid service


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Related Tags: China Standard (1)  China Steel Pipe (1)  

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