Carbon seamless steel pipe

Production Process

The main production process of hot-rolled seamless steel pipes (main inspection process): Tube blank preparation and inspection → tube blank heating → piercing → tube rolling → steel reheating → fixed (reduced) diameter → heat treatment → finished pipe straightening → finishing → inspection  (non-destructive, physical and chemical, bench inspection) → warehousing.

The main production process of cold-rolled (drawn) seamless steel pipes: Billet preparation → pickling and lubrication → cold rolling (drawing) → heat treatment → straightening → finishing → inspections.

Applications of Seamless Steel Tube

Seamless steel tubing finds extensive use across various industries due to its mechanical properties and adaptability. Here are some common applications:Energy & Petrochemical Industry，Machinery Manufacturing & Precision Components，Construction & Infrastructure，Power Generation Industry，Automotive & Shipbuilding Industry ， etc.

It is made by hot rolling or cold rolling of high-quality carbon steel such as 10, 20, 30, 35, 45, 16mn, 5mnv and other low alloy structural steel or 40cr, 30crmnsi, 45mn2, 40mnb and other alloy steel. 10, 20 and other low carbon steel seamless pipes are mainly used for fluid conveying pipelines. Seamless tubes made of medium carbon steel such as 45 and 40cr are used to manufacture mechanical parts, such as stressed parts of automobiles and tractors. Generally, seamless steel pipes are used to ensure strength and flattening tests. Hot-rolled steel pipes are delivered in a hot-rolled or heat-treated state; cold-rolled steel pipes are delivered in a heat-treated state.

Quality Assurance in Seamless Carbon Steel Tube

Certification System: ISO 9001 and CE certified process ensures consistent quality from raw material to final inspection.

Inspection Techniques: Utilizes Non-destructive testing （ultrasonic,X-ray,magnetic particle,eddy current ）, with hydrostatic testing up to 50 MPa.

Compliance Standards: Regular inspections are conducted on the steel pipes, with a qualification rate of 99%.

Industry Experience: 10+ years of industry experience ensures precise manufacturing and high-quality control.