Hot Rolled Seamless Pipe

Name: Hot Rolled Seamless Pipe
Brand: Cangzhou Silver Valley technology Co., LTD

Hot-rolled seamless pipes are steel pipes made by heating steel billets and rolling them into shape without welding. They have uniform wall thickness, high strength, and no seams, making them ideal for high-pressure applications in industries like oil, gas, and construction.

What Is Hot Rolled Seamless Pipe?

A hot rolled seamless pipe is a type of steel pipe manufactured through a process called hot rolling, which involves forming the pipe from a solid billet without any welding seams. This method ensures the pipe has a uniform structure and high strength, making it suitable for high-pressure and high-temperature applications.

Advantages And Disadvantages Of Hot Rolled Seamless Pipe

Advantages：

Superior strength and reliability.
Better resistance to corrosion and high temperatures.
Smooth internal surface, reducing friction and improving flow efficiency.

Disadvantages:

Higher cost compared to welded pipes due to the complex manufacturing process.
Limited availability in very large diameters.

Hot-Rolled Seamless Steel Tube Manufacturing Process

Round tube perforation → heating → three-roll rolling, rolling or extrusion → detached → sizing (or reducing) → cooling → straightening → hydrostatic test (or testing) → mark → storage.

Hot-Rolled Seamless Steel Tube Manufacturing Process

Standards Chemical Composition And Mechanical Properties Of Hot Rolled Seamless Pipe

Standards
Standard	Description
ASTM A106	Standard specification for seamless carbon steel pipe for high-temperature service.
ASTM A53	Standard specification for seamless and welded black and hot-dipped galvanized steel pipe.
API 5L	Specification for seamless and welded steel line pipes used in the oil and gas industry.
EN 10210	European standard for hot-finished structural hollow sections of non-alloy and fine-grain steels.
GB/T 8163	Chinese standard for seamless steel pipes for fluid transportation.
JIS G3441	Japanese standard for carbon steel pipes for general structural purposes.

Chemical Composition And Mechanical Properties
Grade	Chemical Composition (%)					Mechanical Properties
	C	Mn	Si	P	S	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
ASTM A106 Grade B	≤0.30	0.29–1.06	≥0.10	≤0.035	≤0.035	≥240	≥415	≥30
API 5L Grade B	≤0.28	0.90–1.20	≥0.45	≤0.030	≤0.030	≥241	≥414	≥30
GB/T 8163 20#	0.17–0.23	0.35–0.65	0.17–0.37	≤0.035	≤0.035	≥245	≥410	≥24

Applications of Hot Rolled Seamless Steel Pipes

Oil and Gas: Transportation of oil, natural gas, and other fluids under high pressure.
Power Generation: Boilers, heat exchangers, and high-temperature pipelines.
Chemical Industry: Handling corrosive fluids and high-pressure processes.
Automotive: Manufacturing of components requiring high strength and durability.
Construction: Structural applications, such as bridges and buildings.
Mechanical Engineering: Hydraulic systems, bearings, and machinery parts.

Get in Touch with Silver Valley

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We specialize in the production of seamless steel pipes, boiler pipes, oil casing and pipe fittings，If you have any inquiry, please feel free to contact us.

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