Amidst the explosive growth of artificial intelligence and big data technologies, the computing power density of AI servers continues to soar, with single-chip power consumption now surpassing the 1,000W threshold. Against this backdrop, as traditional air-cooling technologies reach their physical limits, liquid-cooling solutions have rapidly evolved from "optional alternatives" into "essential necessities." The large-scale deployment of solutions—such as cold-plate liquid cooling and immersion cooling—has generated a massive demand for the welding of liquid-cooling pipelines. As a high-tech enterprise with over a decade of deep expertise in automated welding, KEPUNI is strategically positioning itself within this high-growth sector; leveraging its core line of pipe welding machines, the company provides reliable technical support to meet the rigorous welding standards required for AI liquid-cooling pipelines.
"Vascular Engineering" in the Era of Liquid Cooling: Welding Processes Face Rigorous Challenges
Liquid cooling systems are hailed as the "vascular network" of AI servers, bearing the critical responsibility of extracting high-flux heat from server cabinets. Whether utilizing the currently mainstream cold-plate liquid cooling or the immersive liquid cooling technology that represents the future, the implementation of a comprehensive, end-to-end fluid circulation piping system is essential. In a large-scale intelligent computing center comprising tens of thousands of cabinets, the total number of liquid cooling pipe welds can reach between 300,000 and 500,000—imposing exceptionally rigorous demands on the welding process.
Specifically, the welding of liquid cooling pipelines presents three major technical challenges. First is the precision welding of thin-walled tubing: liquid cooling systems extensively utilize 304 and 316L stainless steel, with wall thicknesses typically under 3 mm—and in the case of certain chip-level microchannels, as thin as 0.15 to 0.6 mm—making them highly susceptible to burn-through or deformation during welding. Second are the requirements for high cleanliness and corrosion resistance: as the coolant circulates through the pipelines over extended periods, any oxidation, blackening, or microscopic porosity on the inner surface of the weld seam could not only lead to leaks but also shorten the system's service life due to electrochemical corrosion; consequently, the welding process must achieve "single-sided welding with double-sided formation," while ensuring the inner walls remain in a pristine state. Third are the challenges of all-position welding and spatial constraints: given the compact layout of liquid cooling pipelines and the confined spaces within equipment cabinets, welding equipment must possess full-position welding capabilities, and the welding torch itself must be sufficiently flexible.
KEPUNI Pipe Welding Machine: Precisely Resolving the Pain Points of Liquid Cooling Pipe Welding
Addressing the aforementioned industry pain points, the KEPUNI series of all-position automated pipe welding machines—spanning everything from control systems and torch design to process databases—is highly tailored to the specific requirements of liquid-cooled pipeline welding, thereby demonstrating its core strengths of "customized technology and intelligent processes."
Precision Control System: Ensuring Welding Stability at the Source
The KEPUNI tube-to-tube welding machine is equipped with a precision control system based on advanced PLC technology, enabling precise regulation of critical parameters such as welding current, voltage, pulse frequency, and travel speed. For thin-walled liquid-cooled tubes with a wall thickness of merely 0.5 mm, the equipment achieves stable fusion through the precise application of low current and an optimized welding speed, thereby completely eliminating common defects such as burn-through, lack of fusion, and weld spatter. This capability for precise control ensures the consistency and stability of batch welding operations, guaranteeing that every weld achieves the desired result.
Dual Gas Shielding and Built-in Water Cooling: Enabling Clean Welding
Liquid-cooled piping systems demand exceptionally high resistance to oxidation at the weld seams. KEPUNI tube-to-tube welding machines feature a dual internal and external gas shielding design: not only does the torch externally direct a stream of argon to shield the weld pool, but the inner wall of the tube is simultaneously purged with argon, effectively preventing oxidation and discoloration (blackening) on the interior side of the weld. This design aligns perfectly with the critical process requirement for liquid-cooled piping—specifically, the absolute necessity of internal argon purging—thereby ensuring that the interior surface of the tube wall exhibits the requisite post-weld oxidation state: a silvery-white or pale yellow finish.
Furthermore, the welding torch incorporates a built-in circulating water-cooling system, which significantly boosts the torch's duty cycle. During prolonged, continuous welding operations, the torch remains cool and operates without interruption; this not only safeguards the equipment but also guarantees the stability of the welding arc, making it perfectly suited to meet the high-intensity construction demands associated with building intelligent computing centers.
Expert Databases and Intelligent Operations: Lowering Technical Barriers
The explosive growth of the liquid cooling industry has created a tangible challenge: a shortage of skilled welders. KEPUNI tube-to-tube welding machines feature a built-in database of expert welding parameters; operators need only input basic information—such as material type, tube diameter, and wall thickness—via the touchscreen interface, and the device automatically generates optimized welding parameters. With its one-touch operation design and intuitive display, the equipment allows general workers to become proficient after undergoing only minimal training, thereby effectively alleviating the pressure caused by the scarcity of professional welders while simultaneously enhancing the standardization of construction processes.
Rapid Multi-Diameter Adaptability and Material Compatibility
Addressing the diverse pipe diameters and complex components characteristic of liquid cooling systems, KEPUNI pipe welding machines feature built-in multi-diameter adaptation modules that comprehensively cover all mainstream pipe sizes. By enabling one-touch parameter switching, the machines facilitate the welding of pipes with varying diameters—thereby drastically reducing equipment setup time and boosting construction efficiency by over 60%. In terms of material compatibility, the equipment is deeply optimized to handle core liquid cooling pipeline materials—such as 316L stainless steel and red copper. Through precise matching of welding parameters, it effectively prevents weld seam aging, corrosion, and leakage that can result from the long-term corrosive effects of liquid cooling media.
Data Traceability and Quality Control
For the construction of large-scale data centers, the traceability of welding quality is of paramount importance. KEPUNI welding machines offer an optional real-time weld monitoring system that supports automatic recording of welding parameters; this capability captures data such as actual welding current and voltage, facilitating subsequent quality reviews and process improvements. This feature empowers liquid cooling system integrators to establish a comprehensive quality control framework, enabling them to effortlessly meet the rigorous quality audit and compliance requirements of top-tier clients.
Two Core Application Scenarios: From Cold War Shelters to Computing Power Pods
The technical advantages of KEPUNI pipe welding machines have been fully validated in two core application scenarios within liquid-cooling systems.
In the context of integrated Cold War-era shelter scenarios, key piping structures—primarily involving thick-walled tubing and straight-pipe butt-joint flanges—are central components that must withstand the prolonged erosive force of high-pressure coolant. Leveraging a high-precision mechanical alignment mechanism (with a positioning accuracy of up to ±0.02 mm) and an intelligent thermal management system, KEPUNI equipment ensures that flange mating surfaces remain perfectly flat and leak-proof, while weld strength significantly exceeds industry standards.
In the context of high-performance computing (HPC) container scenarios, the focus shifts to the precision welding of closed-loop liquid cooling systems and core flow-distribution components, such as manifolds. The micro-arc welding technology integrated into KEPUNI equipment enables precise control over minute weld seams; furthermore, the sealed welding chamber design effectively isolates the process from external contaminants, making it particularly well-suited for the clean construction environments required within HPC containers.
Market Outlook: The Liquid Cooling Sector Unlocks a Second Growth Curve
The liquid-cooled server market is currently situated within a long-term, high-growth trajectory. According to industry data, the domestic market for liquid-cooled servers surpassed 40 billion RMB in 2025, with market penetration rates rising rapidly. Furthermore, automated pipe welding equipment constitutes an essential and standard requirement for the construction of liquid cooling systems; in 2025, the new market volume for automated pipe welding equipment—driven by domestic liquid-cooled piping systems—exceeded 2 billion RMB, and demand is projected to grow at a compound annual growth rate (CAGR) of over 40% over the next three years.
Leveraging product performance highly tailored to the liquid cooling industry, a wealth of technical expertise in high-end, ultra-clean welding, and a comprehensive system for customized services, KEPUNI is emerging as a key beneficiary within this expanding market segment. KEPUNI has already achieved large-scale application in sectors such as biopharmaceuticals and semiconductor clean piping—industries where requirements for welding cleanliness and hermetic sealing are even more stringent than those in the liquid cooling sector—thereby accumulating mature technical solutions that meet rigorous standards such as GMP and FDA. Capitalizing on this advantage of shared technical lineage, KEPUNI is able to rapidly adapt its existing processes for liquid cooling applications, thereby accelerating its integration into the core supply chains of leading internet companies, telecommunications operators, and liquid cooling integrators.
From a broader macro perspective, KEPUNI’s growth prospects extend far beyond the liquid cooling sector alone. Leveraging the advanced welding technologies it has cultivated within the liquid cooling domain, the company is simultaneously expanding into other high-growth sectors—including hydrogen energy, energy storage, semiconductors, and biopharmaceuticals—thereby establishing a multi-faceted growth framework driven by diverse engines. Furthermore, the company has been officially recognized as a "High-Tech Enterprise" and a "Specialized, Refined, and New" (Little Giant) Enterprise; its products have obtained the EU CE safety certification and are underwritten by the People's Insurance Company of China. These credentials lay a solid foundation for the company to penetrate and capture broader market opportunities.
Conclusion
In this new era driven by AI computing power, liquid cooling technology has emerged as a pivotal direction for the eco-friendly upgrading of data centers. As a critical link in the practical implementation of liquid cooling systems, welding technology is assuming ever-increasing importance. Drawing upon over a decade of technical expertise in automated welding, the KEPUNI brand offers a reliable "Chinese Solution" for liquid cooling pipeline welding—distinguished by its comprehensive advantages in precision control, clean welding, intelligent operation, and efficient adaptability. Whether for the currently mainstream cold-plate liquid cooling systems or the promising immersive liquid cooling technologies of the future, KEPUNI pipeline welding machines are already equipped with the necessary technical reserves to fortify the hardware foundation for the rapid advancement of the digital economy.