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Cold mill inline, speed synchronization 
Greatly improve work efficiency
Breakthrough industry barriers and lead industry development Large diameter rotary black annealing production line: ¢1200*16mm


Hangao distinguishes itself as a premier one-stop service provider in China for high-end stainless steel industrial pipe equipment. Our extensive portfolio includes precision welded pipe production lines, weld bead rolling machines, online and offline bright annealing equipment, welding tracking systems, intelligent control systems, finish rolled pipe bright annealing machines, rotary black annealing machines, and more. We pride ourselves on seamlessly integrating R&D, manufacturing, sales, and comprehensive support services to meet the diverse needs of our clientele.
High Speed Precision Welded Pipe Production Line
Hangao's stainless steel pipe production line solution aligns seamlessly with the evolving landscape of smart industry, featuring integrated intelligent control systems capable of real-time production data recording and line management. Encompassing a diverse array of pipe diameters, our solution offers a range of welding methods, ensuring exceptional precision, speed, yield, and efficiency.
Induction Finished Tube Bright Annealing Production Line
Hangao's stainless steel tube bright annealing machines have earned widespread acclaim, commanding an impressive 80% market share in China. Our commitment to continuous technological advancement, high-end bespoke services, and exemplary professional after-sales support has garnered recognition from discerning industry clients.
Rotary Black Annealing Line
The rotary black annealing production line is used to heat stainless steel pipes to 1050-1080 ℃. Subsequently, place it in a specialized equipment that is cooled to room temperature through water spraying. After our equipment treatment, stainless steel welded pipes meet the technical requirements of ASTM A249-04 for industrial welded pipe heat treatment. Equipped with automatic feeding and discharging devices, the feeding and discharging pipes adopt a rotary feeding method, making the pipes more evenly heated and have better performance; After heat treatment, the pipe does not deform and saves straightening process.

Tube Mill

Hangao stands as the global frontrunner in delivering turnkey project, fully automated stainless steel tube mill lines. With a rich legacy of over two decades in the industry, we boast a comprehensive team dedicated to design, manufacturing, and after-sales support. Our extensive offerings encompass laser-welded tube machines, quick mold change stainless steel manufacturing machines, precision stainless steel tube making machines, titanium-welded tube manufacturing machines, and a spectrum of cutting-edge solutions.

Annealing Line

Hangao also offers a wide range of customised solutions in the field of tube annealing, commanding a robust market share of exceeding 80%. Our offerings include bright annealing machine for common stainless steel welded tubes, bright annealing machine for finish cold rolled tubes, black annealing machine for large and small diameter black steel tubes, in-line annealing plants, off-line annealing lines, etc.

About Hangao

Manufacturer Specializing In High-End Welded Pipe Equipment

Hangao is a 20 years high-tech and specialized enterprise, is China's only one with high-end precision industrial welded pipe production line full set of equipment manufacturing capabilities. At the same time, we have the R&D and manufacturing capacity of precision pipe welding machine, weld bead roller machine, bright annealing machine, off-line rotating annealing line welding tracking system, intelligent control system, mould and other whole plant equipment Products are exported to Dubai, Russia, India, Thailand, Pakistan, Vietnam, Malaysia, Serbia, Costa Rica, South Korea, the United States, Australia and other countries.
After 20 years of development, many of our technologies are leading the world and leading the trend.

The world's first intelligent insulation type bright annealing equipment, insulation section temperature accurate to ±2℃, better guarantee heat treatment quality.
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Why Choose Us

Hangao is a 20years high-tech and specialized enterprise, is China's only one with high-end precision industrial welded pipe production line full set of equipment manufacturing capabilities.
  • One-Stop Service

    Our comprehensive one-stop service and extensive product range, encompassing various pipe making machinery available for purchase, uniquely position us to address and resolve any challenges you may encounter in the pipe-making process. It's our expertise in providing tailored solutions for your specific needs.
  • Powerful Technology
    Our company, backed by two decades of establishment, showcases formidable technical prowess with integrated capabilities in R&D, manufacturing, and sales. Through a continuous commitment to innovation, technical expertise accumulation, and collaborative teamwork, we have earned recognition from industry leaders such as Jiuli, Dewei, and Tsingshan. Our extensive factory space and a comprehensive array of foundational processing equipment underscore our commitment to providing top-tier manufacturing solutions.
  • Perfect After-Sales Service
    Customer-centered company values lead a professional repair team with years of experience and a customer service team that is always on call, your satisfaction is our unwavering commitment.​​​​​​​

What's new at Hangao?

Hangao is a 20years high-tech and specialized enterprise, is China's only one with high-end precision industrial welded pipe production line full set of equipment manufacturing capabilities.
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Bright Annealing: The Key To A Bright Surface for Stainless Steel Tubes

Bright Annealing: The Key to a Bright Surface for Stainless Steel TubesBright annealing is a crucial step in the production of stainless steel tubes. It involves heating the tubes to a specific temperature in a protective atmosphere and then rapidly cooling them to eliminate internal stresses, impro

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Why Industrial Stainless Steel Pipes Need To Be Annealed

For industrial-grade precision stainless steel pipes, the annealing process during the production process is a crucial link. Its main purpose is to adjust the internal organizational structure of the steel pipe, eliminate internal stress, and improve the plasticity and toughness of the steel pipe to

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Hangao Tech Attended The 2023-2024 "Stainless Craftsman" Publicity Event Certification Ceremony

On the morning of April 26, the Guangdong Stainless Steel Materials and Products Association held a certificate awarding ceremony for the 2023-2024 "Stainless Craftsman" publicity event. As a leading company in the fields of induction heating bright annealing equipment, stainless steel internal leve

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"Intelligent Manufacturing" Continues To Develop New Productive Forces

On April 7, Hangao (SEKO) went to the Longjiang Ganzhutan Power Station Historical Exhibition Hall to conduct corporate culture construction activities and learn about the history of Shunde's industrial development.

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Looking Forward To Meeting You at Dusseldorf Fair

As a professional manufacturer of industrial tube mill lines, bright annealing induction heating furnace and internal weld bead roller machine, Hangao(SEKO) will attend to the Dusseldorf Fair held in Germany in coming April.

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If Our Product Is What You Want

Please get in touch with our team immediately to answer you with a more professional solution
Tel: +86-139-2821-9289 
Add: No. 23 Gaoyan Road, Duyang Town, Yun 'anDistrictYunfu City. Guangdong Province

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Guangdong Hangao Technology Co., Ltd. is China's only one with high-end precision industrial welded pipe production line full set of equipment manufacturing capabilities.
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