Automated orbital welding has become a critical process in industries where weld consistency, purity, and traceability are non-negotiable. KEPUNI, a brand of Shanghai Chuanli Industrial Co., Ltd., designs and manufactures orbital welding equipment tailored for these demanding environments.

Problem & Opportunity

Manual TIG welding struggles to meet the stringent requirements of cleanrooms, pharmaceutical WFI systems, semiconductor ultra-pure gas lines, and food-grade sanitary piping. Inconsistencies in weld penetration, contamination risk, and lack of full documentation are common pain points. Automated orbital welding addresses these issues by delivering repeatable, inert-gas-shielded welds that comply with standards such as SEMI F57, 3A, FDA, and EHEDG.

Brand Solution: KEPUNI’s Orbital Welding Portfolio

KEPUNI was established in 2014 and operates a 10,000 m² production facility with 280 employees, including 36 R&D engineers and technicians. The company’s annual production capacity is 3,000 pieces, and it exports 100% of its products internationally to markets including Europe, Asia, South America, North America, and the Middle East. KEPUNI offers a comprehensive line of orbital welding machines, closed and open weld heads, tube-to-tube sheet welders, cold welders, and orbital cutters. Key power supplies include the XD-20PRO and XD-20W, both Pipe Welding Power Supplies capable of handling pipe outer diameters from 3.175 mm to 168 mm and wall thicknesses from 0.5 mm to 3 mm. These units are compatible with Steel and Alloy materials and serve industries ranging from Semiconductor and Pharmaceutical to Oil & Gas and Chemical Processing.

Technical Explanation

The KEPUNI orbital welding system comprises a power supply and interchangeable weld heads. The XD-20PRO power supply supports closed weld heads (40/80/120/170 Series), open pipe weld heads (K Series), and split-type weld heads (5H, 10H, XD-Split Type). The closed weld heads cover pipe ODs from 6.35 mm to 168 mm with wall thickness up to 3 mm. For sanitary applications with small-diameter tubing, the 5H Series split-type weld head welds pipes from 3.175 mm to 15.88 mm (wall thickness ≤1.5 mm). The 10H Series handles 6.35–25.4 mm and is suited for Pharmaceutical, Food & Beverage, and Chemical industries. For larger pipes, the open K Series processes ODs from 19 mm to over 325 mm with wall thicknesses from 2.5 mm to 13 mm, operating at currents of 5–500 A. All systems use a controlled arc in an inert gas environment to produce consistent, full-penetration welds that meet regulatory documentation requirements.

Application Scenarios

• Semiconductor / Electronics: The equipment performs high-purity joints with zero particle contamination for ultra-pure gas (UPG) piping and DI water systems in FAB construction and expansion projects. It requires SEMI F57 compliance and Class 1 cleanroom compatibility. Supporting equipment includes mass flow controllers, VCR fittings, filters, and diaphragm valves.
• Pharmaceutical: Orbital welding ensures aseptic connections for pure water (WFI) piping and CIP/SIP systems in new installation and retrofit projects. Special requirements include FDA compliance, EU GMP, 3A sanitary standards, and full weld documentation.
• Food & Beverage: The system delivers hygienic pipe connections with zero contamination for sanitary piping handling milk, juice, beer, and beverages. Applications require EHEDG certification, no dead leg design, and readiness for USDA/FDA audits. Supporting equipment includes pumps, heat exchangers, tanks, and homogenizers.
• Chemical / Petrochemical: Corrosion-resistant welds, zero leak, and chemical-resistant materials are achieved in chemical process piping. Projects often demand ATEX/IECEx compliance and NACE standards.
• Oil & Gas / Power Generation: For boiler tubes, heat exchanger pipes, and steam piping, the machine produces high-temperature-resistant and pressure-rated welds meeting ASME Section IX and Pressure Equipment Directive guidelines. The K Series open weld head is specifically intended for Oil & Gas, Petrochemical, and Power Generation industries.

Market Trend Analysis

KEPUNI’s products have been implemented in over 30 countries, including the United Arab Emirates, Germany, the United States, Japan, and many others across North America, Europe, Asia-Pacific, and the Middle East. The growing expansion of semiconductor fabs, pharmaceutical facilities, and food processing plants in these regions drives demand for certified orbital welding solutions that can guarantee clean, repeatable welds and full traceability.

Comparison with Traditional Solutions

Compared to manual TIG welding, automated orbital welding delivers higher consistency, reduced rework, and better compliance with cleanroom and sanitary standards. The technology allows for documented weld parameters and data logging, which is essential for regulated industries. An honest limitation is that the initial capital investment for an orbital welding system is higher than manual equipment; however, the total cost of ownership often balances out through lower rejection rates and reduced labor hours on critical piping runs.

Future Outlook

As global regulations around product purity and worker safety tighten, the adoption of orbital welding machines is expected to accelerate. KEPUNI continues to invest in R&D—backed by its 36-member engineering team—to develop more compact, user-friendly systems that integrate with digital documentation platforms. The trend toward prefabrication and modular construction in clean industries further supports the shift to automated orbital welding.