Carbon Steel Round Tube for Structural & Fluid Applications
Shunchen specializes in manufacturing high-quality carbon steel round tubes, adopting premium Q235B/Q355B carbon steel billets as raw materials. With full-automatic precision rolling, welding (for welded pipes) and flaw detection processes, our products feature a smooth inner and outer surface, accurate dimensional tolerance and high structural strength. Complete specifications of seamless and welded pipes are available, with customized processing support for length, wall thickness and surface treatment. Contact us now for the latest carbon steel round tube quotation, free sample provision and professional engineering matching solutions—global export business is supported!
Core Advantages
Ultra-Strong Structural Performance
The circular cross-section design distributes stress evenly, with superior compression and torsion resistance, suitable for various load-bearing scenarios.
Cost-Effective and Practical
High cost performance ratio, abundant raw material supply and moderate price; the product is durable and not easy to deform, reducing later maintenance costs.
High Processability
Easy to realize cutting, bending, welding, threading and other processing operations, adapting to diverse installation and matching needs.
Wide Applicability
Both seamless and welded types are available, matching different working conditions such as low/medium pressure transmission and structural support, with strong scene adaptability.
Technical Specifications
| Parameters | Details |
|---|---|
| Material | Q235B / Q355B |
| Product Type | Seamless carbon steel round tube / Welded carbon steel round tube |
| Surface Treatment | Black paint, anti-rust oil, hot-dip galvanizing, epoxy coating (customizable) |
| Length | Customized as needed, commonly 6m/9m/12m (fixed length) or random length |
| Standards | GB/T 8162-2018 (structural use) / GB/T 8163-2018 (fluid transport use) |
Common Specifications (Outer Diameter × Wall Thickness)
| Specification | Recommended Applications |
|---|---|
| DN20 (26.9×2.8-3.5) | Small mechanical parts, light structural supports |
| DN50 (57×3.0-4.5) | Municipal small-diameter pipelines, equipment frame accessories |
| DN100 (108×4.0-6.0) | Industrial fluid transmission, building secondary structural supports |
| DN200 (219×6.0-10.0) | Large-span structural supports, medium-pressure fluid pipelines |
| DN300 (325×8.0-12.0) | Heavy-load steel structure frames, large-diameter municipal engineering pipelines |
Production Process and Quality Assurance
Shunchen adopts fully automatic numerical control rolling production lines + high-precision welding technology (for welded pipes) + multi-process flaw detection (ultrasonic flaw detection, hydrostatic test) to ensure the smooth inner wall, no hidden welding defects and uniform wall thickness of the pipe body. The whole production process abides by national standard requirements, with ISO9001 quality system certification. We can provide material quality inspection reports, dimensional tolerance test certificates and hydrostatic test reports for customers, ensuring product quality is traceable and verifiable.
Why Choose Us?
- High Precision Manufacturing Advanced numerical control equipment, dimensional tolerance control within ±0.05mm, meeting high-standard processing needs.
- Diversified Customization Support customized processing of special specifications, surface treatment and fixed-length cutting, matching personalized project requirements.
- Factory Direct Pricing No intermediate links, the same specification products can save 15%-25% of procurement costs, with high cost performance.
- Rich Project Experience Our products have been applied in domestic high-rise building, municipal pipeline and overseas industrial plant projects, with a customer repurchase rate of over 90%.
Frequently Asked Questions
Q1: What is the difference between seamless carbon steel round tube and welded carbon steel round tube?
Seamless pipes are formed by hot rolling of steel billets, with no welding seams, suitable for high-pressure, high-temperature and precision fluid transmission scenarios; welded pipes are formed by welding steel strips, with high production efficiency and moderate price, suitable for structural support and low/medium pressure fluid transport.
Q2: What is your Minimum Order Quantity (MOQ)? Do you support small-batch purchasing?
Our MOQ is very flexible to support your business. For standard sizes in stock, we can accept small trial orders (e.g., 1-2 tons). For customized specifications, the MOQ depends on the production process and is open for negotiation. We aim to support both bulk wholesale and small-batch procurement.
Q3: Can you provide Mill Test Certificates (MTC) or third-party inspection reports?
Absolutely. Every shipment is accompanied by a comprehensive Mill Test Certificate (MTC EN 10204 3.1) detailing chemical composition and mechanical properties. If required, we can also arrange third-party inspection (such as SGS or BV) before shipment to guarantee quality standards.
Q4: How long is your standard delivery lead time?
For standard sizes currently in stock, delivery can be arranged within 3-7 days after order confirmation. For customized sizes or large bulk orders, the production lead time is typically 15-25 days, depending on the total quantity and specific processing requirements.
Q5: Do you provide OEM services and customized packaging?
Yes, we are a professional manufacturer supporting OEM and ODM services. We can customize the steel grade, dimensions, surface treatment, and even print your company logo or specific markings on the pipes. Customized bundling and packaging solutions are also available to protect the tubes during ocean shipping.
Q6: How do you ensure the round tubes are not damaged during transportation?
We use standard export packaging. Tubes are bundled with steel strips, protected by waterproof materials, and secured with wooden dunnage inside the container. This prevents friction, deformation, and rust during long-distance maritime transport.
Q7: Can I get a free sample before placing a bulk order?
Yes. We offer free samples (small cut sections) for your quality evaluation and engineering testing. You only need to bear the international courier cost, or we can negotiate the sample shipping fee to be deducted from your future bulk order.
Source Carbon Steel Round Tubes from a Professional Manufacturer
As a reliable supplier, our factory supports wholesale orders with standard sizes in stock. We also provide OEM and customized services, along with free samples for your evaluation. Contact us to buy directly and get the best quotation.
