In modern HVAC and domestic heating equipment manufacturing, heat exchangers are critical components that directly determine system efficiency, safety, and operational lifespan. As wall-hung boilers trend toward compact designs and higher thermal efficiency, flat stainless steel tubes have become the preferred choice for heat exchanger fabrication over traditional round tubes.
To meet the high standards of precision and durablity required for boiler components, ST Machinery provides advanced, fully automated manufacturing solutions. Our latest Stainless Steel Heat Exchanger Tube Mill line is designed specifically to process high-performance 443 stainless steel into precision 45mm x 13.9mm flat tubes, delivering exceptional quality control from uncoiling to final cutting.
Flat Tube Mill Line for Boiler Heat Exchanger
Technical Specifications at a Glance
- Application: Heat Exchanger Tubes for Wall-Hung Boilers / Water Heaters
- Material Grade: 443 Stainless Steel (High Corrosion Resistance & Excellent Thermal Stability)
- Target Tube Profile: 45mm x 13.9mm Flat Oval / Oblong Tube
- Welding Technology: High-Precision Fiber Laser Welding
- Integrated Online Features: Online Internal Weld Bead Flattening & Online Bright Annealing System
Core Technological Advantages of ST Machinery's Flat Tube Line
1. Superior 443 Stainless Steel Compatibility
443 stainless steel is widely recognized in heat transfer applications for its excellent pitting corrosion resistance, lower thermal expansion coefficient, and superior heat conductivity compared to standard austenitic grades. ST Machinery's tube mill features optimized forming roll passes that eliminate surface scratches and work-hardening stresses during the shaping of 443 stainless steel strips.
2. High-Precision Laser Welding
Compared to conventional TIG welding, laser welding offers a narrower heat-affected zone (HAZ), higher welding speeds, and minimal thermal deformation. This guarantees an airtight, pressure-resistant weld seam on 45*13.9 flat tubes-vital for leak-free operation in boiler heat exchangers.
3. Online Internal Weld Bead Flattening
To maximize liquid flow efficiency and prevent scale accumulation inside the heat exchanger, our production line integrates an online internal weld bead flattening unit. It dynamically smooths the internal seam during production, delivering an exceptionally smooth inner wall without compromising wall thickness or strength.
4. Continuous Online Bright Annealing
To restore the ductility of the material after forming and welding, the line features an online induction bright annealing system. Operated under a protective atmosphere, it relieves internal mechanical stress and improves corrosion resistance-all without surface oxidation or scale formation, eliminating the need for subsequent offline heat treatments.
Watch the Production Line in Action
See how ST Machinery's Laser Welded Flat Tube Mill Line seamlessly transforms 443 stainless steel strip coil into finished 45mm x 13.9mm heat exchanger tubes in a single, continuous automated process.
Why Choose ST Machinery for Heat Exchanger Tube Production?
ST Machinery specializes in customized industrial pipe making lines. From material selection guidance to turnkey installation, our engineering team ensures that every machine delivers maximum uptime, minimal material waste, and precise dimensional consistency.
Whether you are looking to produce round, square, or specialized flat heat exchanger tubes, explore our fully customizable Stainless Steel Heat Exchanger Tube Mill solutions or contact our technical team today for a tailored quotation.
Contact Us Today for a Customized Machinery Quote & Technical Consultation:
Official Website: https://www.stmachineries.com/
Direct Inquiry Line / WhatsApp: +86 139 2544 9363
Email: info@stmachineries.com
Factory Location: Foshan City, Guangdong Province, China
