Steel Tube Manufacturing Process
📌 The raw material for steel tubes consists of round steel ingots with a diameter of 230 millimeters.
🔥 Billets, cut to two meters long, are preheated in a rotary Kiln to a temperature of $1280^\circ\text{C}$ before being automatically forwarded to the drilling Mill.
🔩 The initial drilling process is conducted at a speed of 1 meter per second, transforming the ingots into tubes.
⚙️ The tube is elongated up to 17 times its original length by pushing it through forming rollers with an inserted mandrel bar, which decreases thickness and increases length.

Finishing and Customization
📏 The lamination step determines the final length and thickness, resulting in seamless tubes that can reach up to 115 meters in length.
❄️ After cooling, the tubes harden and are then cut to multiple required lengths.
🛠️ Some tubes undergo end adjustment by heating them to forging temperature and modeling them with pressure to create fittings.
🔩 Subsequent steps include heat treatment to achieve the desired strength level, straightening on a roller machine, and in some cases, CNC machining to create fitting threads.

Key Points & Insights
➡️ The manufacturing process involves critical steps like drilling, elongation via forming rollers with mandrel bars, and final lamination for size setting.
➡️ Precise temperature control is essential, with an initial heating target of $1280^\circ\text{C}$ for the billets.
➡️ Post-production customization includes heat treatment for strength and CNC machining for creating precise threads on the tube ends.

📸 Video summarized with SummaryTube.com on Oct 10, 2025, 03:54 UTC