Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

Fluid seamless pipe technology


Fluid seamless pipe technology 
Is a body tube having a hollow cross-section, from start to finish without a steel pipe welds. Steel tube with a hollow cross-section, for a large number of pipe conveying fluid pipeline to transport oil, natural gas, coal gas, water and some solid materials. Compared to solid steel such as steel pipes and round steel in flexural torsional strength the same, lighter, is an economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as drill pipe, automotive transmission, bike frame and steel used in construction scaffolding. Fluid tube is a hollow cross section, no weld steel pipe from start to finish. Ring with a steel pipe manufacturing parts, can improve material utilization, simplify the manufacturing process, saving materials and processing time, such as bearing rings, jack sets, has been widely used to make steel. Steel pipe or a variety of conventional weapons is an indispensable material barrel, barrel must steel pipe manufacturing. The steel pipe different shape of the cross-sectional area can be divided into the tube and Yixingguan. Since the equal conditions in the perimeter area of a circle with a round pipe can deliver more fluid. In addition, annular cross-section when subjected to internal or external radial pressure, force more uniform, therefore, most of the pipe is circular tube 
1. Transmission fluid with seamless steel pipe (GB/T8163-1999) is generally seamless steel pipe for conveying water, oil, gas and other fluids. 
Fluid tube weight formula: [(OD - Wall Thickness) * thickness] * 0.02466 = kg / m (weight per meter) 
Implementation of standards 
Chinese national standard GB/T8163 
For conveying water, oil and gas and other fluids. 
Mainly produces steel grades 
10 #, 20 #, Q345 
Mechanical behavior 
Pipe wall thickness of steel pipe the species outside diameter (D) (S) 
Pipe wall thickness cold drawn pipe steel pipe diameter (mm) allow deviation (mm) (mm) allow deviation (mm) 
> 30 ~ 50 ± 0.3 ≤ 30 ± 10% 
> 50 ~ 219 ± 0.8% 
Hot-rolled tubes> 219 ± 1.0%> 20 ± 10% 
Mechanical Properties 
The standard grades tensile 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 
Standard Chemical Composition 
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 / / /

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