GB8163 Line Steel Pipe Seamless Steel Pipe

Short Description:

GB 8163 Seamless Steel Pipe is used for conveyance of petroleum, natural gas and other common fluids.8163 fluid pipe is a kind of pipe with hollow section and no weld from end to end. The steel pipe has a hollow section, and is widely used as a pipe for conveying fluid, such as oil, natural gas, gas, water and some solid materials.

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Product Introduction

Compared with solid steel such as round steel, the steel pipe is light in weight when the bending and torsion strength are the same. It is an economical cross-section steel and is widely used to manufacture structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffold used in construction. Manufacturing ring-shaped parts with steel pipes can improve the utilization rate of materials, simplify the manufacturing process, and save materials and processing hours, such as rolling bearing rings and Jack sleeves. At present, steel pipes have been widely used for manufacturing. Steel pipe is also an indispensable material for all kinds of conventional weapons. The barrel and barrel of guns are made of steel pipe. Steel pipes can be divided into round pipes and special-shaped pipes according to different cross-sectional areas and shapes. Since the circular area is the largest under the condition of equal circumference, more fluid can be transported by circular pipes. In addition, when the ring section is subjected to internal or external radial pressure, the force is more uniform. Therefore, the vast majority of steel pipes are round pipes.

Standard: GB/T8163.

Main Steel Tube Grade: 10, 20, Q345, etc.

Other grades can also be provided after consulting with customers.

Product Display

Chemical Composition

Standard	Grade	Chemical Composition %
Standard	Grade	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	≤0.15	≤0.25	≤0.25
	20	0.17-0.24	0.17-0.37	0.35-0.65	≤0.035	≤0.25	≤0.25	≤0.25
	Q345	0.12-0.20	0.20-0.55	1.20-1.60	≤0.045	/	/	/

Mechanical Properties

Standard	Grade	Mechanical Properties
Standard	Grade	Tensile Strength MPa	Yield Strength MPa	Elongation %
GB/T8163	10	335-475	≥205	≥24
	20	410-550	≥245	≥20
	Q345	490-665	≥325	≥21

Mechanical Property of DIN 17175 St35.8 Seamless Steel Tubes

Standard	Grade	Tensile Strength(MPa)	Yield Strength(MPa)	Elongation(%)
DIN 17175	St35.8	360-480	≥235	≥25

Technological Process

Hot rolling (extruding seamless steel pipe): round tube blank → heating → piercing → three roll cross rolling, continuous rolling or extrusion → pipe stripping → sizing (or reducing) → cooling → blank tube → straightening → hydrostatic test (or flaw detection) → marking → warehousing.

Cold drawn (rolled) seamless steel pipe: round tube billet → heating → perforation → heading → annealing → pickling → oil coating (copper plating) → multi pass cold drawing (cold rolling) → billet → heat treatment → straightening → hydrostatic test (flaw detection) → marking → warehousing.

Additional Condition

UT(Ultrasonic examination).
AR(As Hot Rolled only).
TMCP(Thermal Mechanical Control Processing).
N(Normalied).
Q+T(Quenched and Tempered).
Z Direction Test(Z15,Z25,Z35).
Charpy V-Notch Impact Test.
The Third Party Test (such as SGS Test).
Coated or Shot Blasting and Painting.