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Seamless steel pipe VS Welded steel pipe
Created on 03.10
Seamless Pipe is manufactured by piercing a solid steel billet to form a hollow tube without any joints or seams.
Welded Pipe is formed by bending and rolling a steel plate or strip and then welding the seam.
Seamless Pipe generally offers higher strength and better pressure resistance as there is no weak weld seam.
Welded Pipe's strength is dependent on the weld quality; the seam is a potential weak point under high pressure.
Seamless Pipe has a more complex manufacturing process and lower production efficiency, making it more expensive.
Welded Pipe is easier and faster to produce, resulting in lower cost and better economic efficiency.
Seamless Pipe (especially hot-rolled) can have inconsistent wall thickness and a rougher surface finish. Cold-drawn seamless pipes offer better precision.
Welded Pipe starts with a uniform steel sheet, offering consistent wall thickness and a smoother surface.
Seamless Pipe is used in critical, high-pressure, high-temperature environments like oil & gas drilling, power generation, and chemical processing.
Welded Pipe is widely used for low-pressure fluid transport (water, gas), structural applications, fencing, and general construction.
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