Round tube

Black Steel Round Pipe | High-Strength Structural Tubing

A black steel round pipe is a non-galvanized steel pipe with a natural black oxide surface. It features excellent structural strength, high processability, and cost-effectiveness, making it widely used in machinery manufacturing, construction, and pipeline systems. Since it lacks rust protection, painting, coating, or galvanization is often applied to enhance corrosion resistance.

📌 Manufacturing Process

① Raw Material Preparation – High-quality hot-rolled steel strips are selected for stable strength and toughness
② Pipe Formation – High-frequency welding is used to shape the steel strip into a round pipe
③ Seam Finishing – Weld seams are ground and cooled for a smooth and solid finish
④ Sizing & Calibration – Precision adjustment ensures uniform diameter and standardized dimensions
⑤ Cutting & Inspection – Pipes are cut to custom lengths and inspected for quality and accuracy

📌 Key Features

🔸 Strong & Stable Structure – The round shape evenly distributes stress, making it ideal for structural applications
🔸 Highly Processable – Welding, bending, cutting, and perforating can be easily applied
🔸 Cost-Effective – More affordable than galvanized round pipes, ideal for budget-conscious projects
🔸 Customizable Surface Treatment – Can be painted, coated, or hot-dip galvanized for enhanced corrosion resistance

📌 Applications

🔸 Construction & Steel Structures – Building frames, steel frameworks, bridge supports
🔸 Machinery & Equipment Manufacturing – Machine parts, industrial supports, transmission shafts
🔸 Pipeline Systems – Water pipes, ventilation ducts, cooling pipelines (additional anti-corrosion treatment required)
🔸 Furniture & Interior Design – Table & chair frames, display racks, industrial-style decor
🔸 Agriculture & Green Building – Greenhouse frames, farm structures, handrails & fences

📞 Contact Us
Need custom-cut round pipes? We offer tailored processing and cutting services—feel free to reach out!
📩 Line Official Account: @guokai
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