Seamless steel pipe

Seamless steel pipe is a kind of long section steel with hollow section and no joints around. It is a kind of economical steel, which is widely used as the pipeline for transporting fluid, such as oil, natural gas, gas, water and some solid materials.

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High-Performance Seamless Steel Pipe (Carbon & Alloy)

Name: ASTM A106 & API 5L Seamless Steel Pipe
Brand: Ruixiang Steel
Availability: InStock
Rating: 4.9 (185 reviews)

Ruixiang Steel specializes in premium Seamless Steel Pipes manufactured through advanced hot-rolling and cold-drawing processes. Engineered for high-pressure environments, our pipes meet ASTM A106, API 5L, and EN standards. Whether for oil and gas transport or precision mechanical parts, we ensure zero-defect internal surfaces and precise wall thickness.

Technical Specifications & Capabilities

Category	Details / Range
Execution Standards	API 5L (PSL1/PSL2), ASTM A106/A53, DIN 17175, EN 10210, GOST 8732
Material Grades	Gr.B, X42–X70, ST37, ST52, 20#, 45#, 16Mn, 12CrMo, 15CrMo
Outer Diameter (OD)	21.3mm – 914mm (1/2" – 36")
Wall Thickness (WT)	1.0mm – 60mm (SCH20, SCH40, SCH80, SCH160, XXS)
Precision Tolerance	OD: ±1%, WT: ±10% (Tighter tolerances for Cold Drawn available)
Surface Treatment	Varnish/Black Painting, Anti-corrosion Oil, 3PE, FBE, Galvanized
End Finishing	Plain End, Beveled End (30°±5°), Threaded & Coupled

Seamless steel pipe bevel and wall thickness quality

Precision beveling for perfect on-site welding.

Industrial Applications

Oil & Gas: High-pressure transmission pipelines and OCTG.
Mechanical: Hydraulic cylinders, automotive axles, and precision bearings.
Boiler & Energy: Heat exchanger tubes and high-temperature steam lines.
Construction: Structural columns and heavy-duty bridge components.

Seamless Steel Pipe FAQ

Q: What is the main advantage of Seamless over Welded pipe?

A: Seamless pipes do not have a weld seam, allowing them to withstand much higher internal pressures and making them more resistant to corrosion and mechanical failure in critical applications.

Q: Do you provide certification for your pipes?

A: Absolutely. Every shipment includes a Mill Test Certificate (MTC) per EN 10204 3.1, confirming chemical composition, tensile strength, yield strength, and flattening/hydrostatic test results.

Seamless steel pipe

Oil pipe

High-quality Pipeline Seamless Steel Pipe , meets API 5L standards, suitable for oil and gas industry. This API 5L Pipeline Pipe is made with seamless steel, and meets all API 5L standards for oil and gas industry use. It has high strength and excellent resistance to corrosion, making it ideal for use in harsh environments. Its durability ensures long service life, and the precision manufacturing ensures a high-quality product. Its wide range of dimensions and grades makes it suitable for a variety of applications in the oil and gas industry. This product has been designed to reduce maintenance costs, improve performance, and increase efficiency.

Rectangular pipe

Rectangular tube is a square rectangular tube, also known as a rectangular hollow section (RHS), is a type of hollow tube with a rectangular cross-section. It is made from steel and is characterized by its four equal sides and uniform wall thickness.