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Carbon steel Seamless pipe
Carbon steel Seamless pipe
Carbon steel seamless pipes are produced by piercing solid billets and then rolling or drawing them into hollow tubes without welds, providing excellent mechanical strength, uniform structure, and leak resistance. Meanwhile, Cold Drawn Seamless Tubing offers tighter dimensional control, smoother surfaces, and higher strength, making it ideal for precision applications such as hydraulic systems and mechanical tubing.
Seamless carbon steel tubes usually contain 0.06% to 1.5% carbon, depending on their grade and use. Seamless mild steel pipes are popular for their weldability, ductility, and low cost, and are widely used in water and gas lines, HVAC, and general pressure systems.
ZhaojianSteel supplies carbon steel seamless pipes in various grades and sizes, providing reliable solutions for oil & gas, chemical, boiler, and hydraulic applications. Common grades include ASTM A106 B/C, A53 (types E, F, S), A333 Grade 6, A519, and others. The size range covers outer diameters from 15.88 mm to 1016 mm, with wall thicknesses varying from 1.2 mm to 40 mm.
Products
Carbon Steel Seamless Pipes Specifications
| Parameter | Specification |
| Size Range (OD) | 1/8" – 24" (10.3 mm – 610 mm) |
| Wall Thickness | SCH 10 – SCH 160 / XXS (up to ~60 mm, depending on size) |
| Length | 5.8 m / 6 m / 12 m (standard) or custom cut-to-length |
| Manufacturing Method | Hot-finished (HFS) / Cold-drawn (CDS) |
| Material Grades | ASTM A106 Grade A/B/C, ASTM A53 Grade A/B, API 5L Gr. B/X42–X70, EN 10210, DIN 2448 |
| Standards | ASTM A106 / A53 / A333, API 5L, ASME B36.10M, EN 10210, DIN, JIS |
| End Types | Plain End (PE), Beveled End (BE), Threaded End (TE) |
| Surface Treatment | Bare / Black painted / Varnished / Oiled / Galvanized |
Quality Certification
Applications of Seamless Carbon Steel Pipes
Oil & Gas Transportation: Suitable for high-pressure and high-temperature pipelines for oil and gas.
Chemical & Boiler Equipment: Used in pressure-bearing components such as reactors, heat exchangers, and steam system lines.
Power Systems: Applied in boiler tubes, reheaters, and condensers.
Mechanical & Hydraulic Systems: Cold-drawn pipes are used for hydraulic cylinders, structural components, and precision parts.
Construction & Structural Engineering: For support structures, foundation piles, and piping systems in buildings.
Municipal Pipelines: Used in water supply, gas distribution, and sewage systems.
More Details About Zhaojian Steel Products
Key Features
Wall Thickness Control
Strictly control wall thickness variation; smooth surface free of cracks and defects.
Performance Assurance
Precise chemical composition and heat treatment ensure excellent strength and pressure resistance.
High-Quality Raw Materials
Selected premium steel for wear and pressure resistance, minimizing leakage risks.
Seamless Carbon Steel Pipes Manufacturing Process
- Billet Heating: Steel billets are heated to 1250–1300°C in a rotary hearth furnace.
- Scale Removal: The surface scale is removed using high-pressure water.
- Piercing Process: The billet is pierced into a hollow shell using a vertical piercing press.
- Cross Rolling: The hollow shell is reduced in wall thickness and adjusted for outer diameter in the cross-rolling mill.
- Pilgering Process: The hollow shell is stretched and elongated in the Pilger mill, reducing cross-sectional area.
- Reheating: The pipe is reheated to 900–940°C in a natural gas-fired walking beam furnace.
- Stretch-Reducing Mill: The pipe’s final outer diameter is formed in the stretch-reducing mill.
- Straightening: The pipe is straightened using a roll straightening machine.
FAQ
ASTM A106 Gr B,ASTM A53 Gr B,API 5L Gr B / X42–X80,ASME B36.10M,etc
Usually we don’t set MOQ, but the more, the cheaper. Besides, we are happy to make samples for clients to ensure quality standards.
We can provide a full range of value-added processing services, including cutting, bending, prepainting, and galvanizing.
