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Three-Cathode Welding System
Components:
Several parts make up the system; these are a 3D welding torch adjustment, a 4-roll squeeze device, a weld boot, a three-cathode welding system, and an electromagnetic control system.
Primary Function:
Essentially, the device is designed to round and size the pre-rolled tube blank that has already turned into a closed circle; at the same time, it keeps the dimensions unchanged before the compression.
Squeeze Device and Weld Boot:
The initial set of squeeze rollers is used in the production line downstream of the tube forming to help reduce the wear of the tube blank and ensure that it smoothly enters the weld boot for welding. At the same time, after the welding is completed, a second set of squeeze rollers is used to fix the tube and prevent any deformation.
Welding of Formed Straight-Seam Closed Strips:
The welding box is the most crucial component of a welded pipe production line. The quality of the weld is the determining factor of the product quality. There are mainly two factors that affect the quality of the weld: the accuracy of the welding roller runout and the influence of heat radiation and conduction during welding on the roller accuracy.
Insulated Bright Annealing
Three-Cathode welded industrial stainless steel tubes require solution annealing with accurately controlled holding and cooling after gas & oil welding at high speed. The main heat treatment consists of raising the temperature of the tube from room temperature to 1050°C, holding it at 1050°C for a certain time, and then cooling it down with gas & oil. The treatment makes the steel microstructure fully homogeneous, and the internal stresses are mostly relieved, thus the material becomes stable, and its properties, good for tube performance, are enhanced.
| Model | OD range | Wall thickness | Speed | Shaft diameter | Moter（kw） | Welding method | Annealing power | Gearbox |
| HZG-JM-40X | φ6-28MM | 0.4-2.0MM | 2-15 M/MIN | φ40/25 | 5.5＋5.5＋5.5 | ATTTA | 80/9KW | 70 |
| HZG-JM-40 | φ15-50.8MM | 0.5-2.0MM | 2-15 M/MIN | φ40/30 | 7.5＋5.5＋5.5 | ATTTA | 160/9KW | 80 |
| HZG-JM-50 | φ25-76.2MM | 0.5-3.0MM | 2-15 M/MIN | φ50/35 | 11＋7.5＋7.5 | ATTTA | 200/9KW | 95 |
Forming Section
precision manufacturing
Bright Annealing Section
DSP+IGBT
Welding Section
3TIG+2 Electromagnetic control
Intelligent Control System
self-diagnostic function
Welding Roll Design
Preventing the inverted "V" phenomenon
Servo Power Unit
Provides more efficient transmission
The stainless steel tube control pipe machine for petrochemical applications has the following characteristics:
Corrosion-resistant alloy materials, meeting sanitary standards:
The three-cathode welding production line uses highly corrosion-resistant alloy stainless steel, maintaining excellent performance even in the harsh environments of the petrochemical, food, and automotive industries.
Stability under extreme conditions, continuous deformation forming:
This welded pipe making machine is suitable for extremely high temperature and pressure environments. Furthermore, even under the most demanding high temperature and pressure conditions, the pipe maintains extremely high welding stability and safety.
Advanced pipe forming technology, yield rate exceeding 97%:
The company possesses highly advanced W-forming technology to ensure the precision of pipe dimensions and shapes to meet the stringent performance standards of the food, automotive, and petrochemical industries.
Multi-layer wall pipe production capability, saving maintenance costs:
This is a series of research and innovation activities based on existing stacked construction technologies, utilizing materials more effectively through layered multi-scale structures to obtain products with higher performance or lower costs. It aligns with the most in-depth exploration of the material design philosophy.
Intelligent Production Control, Digitalized Production:
Equipped with an intelligent automated control system, it allows for real-time visualization and operation of the production process, tracing parameters such as welding current, power, and frequency for each steel pipe, thereby improving production efficiency.
Flexible Application of Multiple Processes:
The roll forming machine's production process is applicable to various sanitary pipes and petrochemical pipelines, including 316L, duplex steel, and nickel-based alloys, thus meeting the corrosion resistance, seamlessness, and flexibility requirements of different customers and enhancing the versatility of the three-cathode welded pipe production line.
Compliant with Industry Standards, Stable Product Quality:
It ensures that the produced stainless steel pipes strictly adhere to applicable industry standards and ISO quality standard certification, thereby guaranteeing product reliability and safety.
Company Introduction
Company Age: A reliable Chinese manufacturer with more than two decades of experience in the manufacture of welded pipe equipment.
Technical Team: More than 30 factory management and technical personnel are available.
Factory Area: A state-of-the-art production and storage facility covering an area of more than 20,000 square meters.
Core Products: Precision-welded pipe production lines, weld straightening equipment, brightening equipment,
welding tracking systems, intelligent control systems, precision cold rolling brightening equipment,
rotary annealing equipment, etc.
R&D Strength: We have more than 30 national patents and continue to acquire new patents regularly.
Certifications: We are a national high-tech enterprise, ISO9001 certified for our quality management system, and we ensure quality in every stage from design to service.
Partners: Our unwavering pursuit of excellence has earned the trust of numerous industry leaders, including Juli, Wujin, Sanhua, Plymouth (USA), and Penna (India).
Market Coverage: Our products are sold globally, exported to numerous countries and regions besides China, including Dubai, Russia, India, South Korea, Thailand, Pakistan, and Vietnam.
FAQ
A1: A three-cathode TIG welding production line is a precision welded tube production system using three TIG torches in sequence. Hangao combines three-stage welding with dual electromagnetic control for edge cleaning, preheating, and final welding, helping improve weld stability and production efficiency.
A2：Conventional TIG generally relies on one torch for the main welding operation, while three-cathode TIG separates the process into edge cleaning, preheating, and final deep welding. Hangao combines multiple torches with dual electromagnetic control to improve welding stability.
A3：A three-cathode TIG line is mainly suitable for industrial stainless steel tubes, sanitary tubes, food-processing pipes, automotive tubes, and selected petrochemical pipes. Depending on the configuration, it can also process materials such as 316L, duplex steel, and nickel-based alloys.
4/ Online pipeline operation testing is done before shipment.
A4：According to Hangao's published models, its three-cathode TIG lines cover φ6–28 mm, φ15–50.8 mm, and φ25–76.2 mm diameter ranges, supporting different stainless steel welded tube applications.
A5：Hangao's three-cathode TIG technology combines three-torch welding, dual electromagnetic control, 3D torch adjustment, four-roll squeezing, precision welding rolls, intelligent control, self-diagnostics, and servo power transmission.
