Electric Resistance Welded tube mills turn cold-rolled or hot-rolled coils into precision-welded steel tubes at remarkable speed – a process vital for construction scaffolding frames up to oil-and-gas transmission lines worldwide.
1 Coil Entry Station → straightener removes coil-set; accumulator maintains continuous feed.
2 Slitting & Edge Milling → strips trimmed; edges scarfed for clean weld.
3 Forming Section → multi-roll stands gradually shape strip into round/square/rectangular profile.
4 High-Frequency Welding → 400 kHz current heats edges; pressure rolls forge joint instantly.
5 Weld Seam Normalization → controlled cooling plus inline annealing restores grain structure.
6 Sizing & Cutting → Turks-head rolls fine-tune dimensions; flying saw cuts finished pipe.
7 Non-destructive Testing → ultrasonic + eddy-current check weld integrity; hydrostatic test optional.
8 Bundling & Packaging → automatic stacking prepares ready-to-ship bundles.
• Cost Efficiency: Lower capital & operating cost per ton.
• Wall Thickness Range: 0 mm tolerance ±5 %.
• Dimensional Accuracy: ±0 .25 mm OD consistency.
• Quick Changeover: New size achieved within one shift.
• Structural: Scaffold poles; stadium roof trusses.
• Automotive: Chassis rails; exhaust systems.
• Energy: API-grade pipeline casing; fire-suppression piping.
• Mechanical: Furniture tubing; hydraulic cylinders.
Choosing an ERW Tube Mill Supplier
Look for:
• Proven track record ≥20 years.
• Full-line capability including forming rolls + HF welder + online testing.
• ISO-certified quality management & CE marking.
• After-sales service network covering installation training.
Founded 1989 in Shenyang by five university professors with vision “to industrialize China’s tube-mill technology,” SRET now holds three decades’ market leadership.
Core Strengths
• R&D Depth: 30+ patents—latest induction-heating HF welder slashes energy use by 12 %.
• Product Breadth: Lines handling Ø8–Ø610 mm OD at speeds up to 120 m/min; square/rectangular reshaping options included.
• Quality Assurance: All mills pass ISO 9001; third-party BV/SGS audits accepted worldwide.
• Global Footprint: Over 500 installations across Asia-Pacific; recent projects delivered within six months turnkey.
For manufacturers seeking reliable ERW tube mill technology that balances precision speed cost effectiveness—SRET Co., Ltd remains unmatched after 30 years continuous innovation visit www.sret-tech.com today.
