Your reliable factory for high - quality carbon steel pipes

With over 22 years of steel pipe production experience, we provide you with the best production solutions.
We use high-quality carbon steel raw materials to ensure the quality of carbon steel pipes from the source.
Equipped with advanced equipment and intelligent production lines, we achieve high production precision and speed to ensure on-time delivery.
Our factory-direct pricing enables us to offer cost-effective and high-quality solutions.
Compliant with API/EN/JIS standards | Strict quality control for each product.

High - quality carbon steel pipe manufacturer from China

With 22 years in steel pipe manufacturing, Huayuan boasts rich experience, using high-quality carbon steel from top domestic mills plus mature processes. Our carbon steel pipes feature high strength, good toughness and excellent corrosion resistance, meeting harsh demands. We have a strict full-process inspection system, with multiple checks from raw material warehousing to finished product delivery, ensuring all pipes meet international standards. Capable of producing seamless carbon steel pipes in various specs, we cater to diversified needs in construction, machinery manufacturing, energy and other industries. We offer flexible production for orders of any size and one-stop procurement services.

Huayuan: Focused on the quality of carbon steel pipes, creating comprehensive pipeline solutions.

Huayuan focuses on manufacturing seamless steel pipes, delivering diverse, high-performance carbon steel pipe products through advanced processes and strict quality control.

Process refinement meets varied needs：
Hot-Rolled Seamless Carbon Steel Pipes：With efficient production, a wide size range and strong mechanical properties, they are reliably used in fluid transportation, structural support and other applications.
Cold-Rolled/Cold-Drawn Seamless Carbon Steel Pipes：Exquisite craftsmanship ensures high dimensional accuracy (±0.1mm), smooth surfaces and uniform wall thickness — ideal for precision machinery, hydraulic/pneumatic systems and automotive components with strict performance requirements.
Hot-Expanded Seamless Carbon Steel Pipes：They break through the diameter limitations of traditional pipes, providing a cost-effective large-diameter solution for specific project needs.
Custom Shapes for Multiple Scenarios：
Round Carbon Steel Pipes：With standard specifications and wide application, they are the mainstay for fluid transportation and structural uses.
Square Carbon Steel Pipes：Featuring high structural strength and strong bending resistance, they are widely used in building frames, machinery, furniture and more.
Special-Shaped Carbon Steel Pipes：Non-standard cross-sections can be flexibly customized to meet complex designs, unique spatial layouts or specific functions, demonstrating Huayuan’s customized production capabilities.

Hot-rolled seamless carbon steel pipes

Cold-rolled/cold-drawn seamless carbon steel pipes

Hot-expanded seamless carbon steel pipes

Carbon steel round pipes

Carbon steel square pipes

Carbon steel special-shaped pipes

Specifications of carbon steel pipes

Core Material
ASTM A105、ASTM A36、ASTM A106 Gr.B、ASTM A106 Gr.B、ASTM A1008 CS Type B
Product Form
We can produce round carbon steel pipes (outer diameter 10-325mm, wall thickness 1-40mm), square carbon steel pipes (side length within 500mm), and 12 standard cross-section carbon steel products such as elliptical pipes, triangular pipes, and D-shaped pipes. We also support customization of complex special-shaped cross-sections based on CAD drawings.
Key Performance
Tensile strength of 330-630MPa (GB/T 228.1), maximum working pressure of 42MPa (ASME B31.3), and temperature range of -20℃ to 450℃ (20G material).
Production Process
Hot-rolled seamless pipes use Mannesmann piercing with three-roll continuous rolling for uniform wall thickness. Cold-drawn pipes undergo multi-pass deformation and bright annealing to eliminate stress and enhance surface precision. Our triple quality control ensures 100% eddy current testing, 1.5x hydraulic pressure holding test, and 0.02mm laser diameter measurement for zero-defect delivery.

Discover Our Carbon steel Pipes Case Studies

Learn how Huayuan provides durable, reliable, and convenient carbon steel pipe products in real projects.

Customized Special Materials

For special environments involving high pressure, low temperature, corrosion, etc., Huayuan offers multi-dimensional material customization solutions: adjusting the carbon-manganese alloy ratio of base materials such as Grade 20 and Q345B (carbon content accuracy ±0.02%), or adding alloying elements like chromium (Cr) and nickel (Ni) (e.g., adding 2.0% Cr for offshore engineering pipes), with spectral analysis ensuring compositional uniformity to extend the salt spray test life of pipes by 50% (exceeding 1,500 hours); typical applications include hydrogen pipelines operating at -40°C, thermal power boiler pipes resistant to 450°C high temperatures, and offshore platform risers resistant to chloride ion corrosion, with all materials undergoing thorough chemical composition testing and mechanical property verification to ensure compatibility with target operating conditions.

Carbon steel undergoes salt spray testing.

Metallographic Analysis of Carbon Steel Pipe

Customized Surface Treatment

Huayuan provides various high-end customized surface treatment solutions for carbon steel pipe products, balancing aesthetics and long-term durability. Our processes include polishing, sandblasting, asphalt anti-corrosion, galvanizing, pickling, etc.

Huayuan’s surface treatment technology not only achieves a 40% increase in anti-corrosion life and an appearance defect rate of <0.1%, but also provides multi-functional customized solutions for high-pressure gas pipelines, food-grade clean pipelines, precision instrument structural components, etc. through material compatibility testing (such as the compatibility between galvanized layers and epoxy coatings).

Surface Sandblasting of Carbon Steel Pipes

Surface Asphalt Anticorrosion forAlloy Steel Pipes

Surface Galvanizing of Alloy Steel Pipes

Professional CNC Machining Service

Huayuan leverages in-house advanced CNC machining equipment and a decade of technical expertise to specialize in custom carbon steel tube machining. We deliver turnkey in-house production services – from raw tubing to precision components – with strict end-to-end control over processes and quality.

Our professional engineering team deeply engages in process design and optimization, implementing rigorous quality inspections (including 100% non-destructive testing for critical procedures) to ensure part accuracy and assembly reliability.

General Manufacturing Processes of Carbon Steel Pipes

Huayuan has always taken every manufacturing process of carbon steel pipes seriously and established systematic quality control rules to ensure excellent quality.

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Your Trusted Seamless Steel Pipe Factory

Your reliable factory for high - quality carbon steel pipes

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High - quality carbon steel pipe manufacturer from China