GB/T8163 Seamless steel tubes pipes for liquid service

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Update time : 2026-05-14 08:43:26

　　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（％）
Standard codes	Models of steel tubes	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/T8163:Seamless steel tubes pipes for liquid service,Shengtian Group is professional steel pipes manufacturer in China,supply all kinds of carbon steel and stainless steel pipe.Email : pipe@stpipefitting.cn

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