The 50x50-140x140mm Carbon Steel Machine High Precision Square Tube Mill is designed to produce welded round pipes with diameters ranging from 50x50mm to 140x140mm and wall thicknesses of 2.0-5.0mm. Featuring roll pass design, this production line manufactures welded steel pipes with excellent machining quality and high precision assembly.

• Standard: Conforming to the YB189-64 standard
• Material: Low carbon steel and low alloy constructional steel
• Mechanical properties: δs≤345Mpa δb≤610Mpa
• Strip Width: 180-560mm
• Strip Thickness: 2.0-5.0mm
• Inner Diameter of Coils: φ480～φ570mm
• Outer Diameter of Coils: φ1000～φ1800mm
• Coil Weight: ≤10T

• Pipe Diameter: Square pipe: 50x50-140x140mm (Same size rectangular pipe available)
• Thickness: 2.0-5.0mm
• Length: 4-6m
• Pipe-cutting Precision: 0-6mm
• Forming Speed: 10-50m/min

• Work shop: 60x6m, H＞5m (crane to ground)
• Power: Approx. 1212KW 380V/50Hz/3phases
• Circulation Cooling Water (whole system): Flow: 20T/h～30 T/h, Pool Volume: 30m³
• Compressed Air (whole system): Flow: 5m³/min, Pressure: 5-7kg/cm²
• Others: Seller will supply list

• Strip steel to coil
• Uncoiler
• End straightener
• Flattener
• Shear welder
• Storage material unit
• Formed, welding, cooling, accurate pipe diameter size
• Accurate pipe length size, cutting
• Inspection
• Package

Upon equipment arrival, our technical service personnel will provide on-site debugging, maintenance, commissioning, and operational guidance. We conduct technical training for the buyer's operation and maintenance personnel. When used according to specifications under normal operating conditions, we provide a 12-month warranty from the date of equipment arrival. For quality-related issues causing equipment malfunction, we offer free repairs or part replacements.

• The Seller manufactures the equipment according to relevant standards and tests it according to technical documents.
• The Buyer may inspect and test the equipment at the Seller's factory upon notification. If the Buyer fails to arrive on time, the Seller may proceed with delivery as per contract terms.

The Seller provides the following documents in English:

• Foundation Plan (including water, electricity and air arrangements)
• Arrangement Plan
• Operation Instruction (including operation manual, maintenance, troubleshooting, safety rules, consumable parts list, and purchased parts list)

Hebei Tengtian Welded Pipe Equipment Manufacturing Co., Ltd specializes in high-frequency welded pipe equipment and opening cold bend steel equipment. As a professional manufacturer integrating research, production, sales, and service, we produce high-frequency welded pipes, slitting equipment, opening cold bend steel, and stainless steel units. Our skilled team has exported equipment to South Korea, Vietnam, Indonesia, South Africa, Kazakhstan, and other regions, earning high praise from domestic and international customers.