Reinventing orbital welding precision
TIG orbital tube welding, with or without filler wire
The Polysoude P4 is a next-generation portable smart welding station designed specifically for high-precision TIG orbital tube welding. With more than six decades of expertise behind it, Polysoude has engineered the P4 to combine advanced automation, seamless Industry 4.0 connectivity, and excellent ergonomic performance. The result is a welding system that ensures reliable operation, precise control, and outstanding weld quality—whether used in a workshop or in demanding onsite conditions.
The P4 offers an exceptionally ergonomic design built around ease of use. Its wireless touchscreen interface provides intuitive navigation, allowing operators to quickly access welding programs and system functions. The modular structure enables seamless compatibility with all Polysoude welding heads—whether open or closed, filler metal is required or not—making it highly adaptable to various tube welding scenarios.
Engineered for modern production environments, the P4 features full Industry 4.0 readiness through its integrated OPC-UA server. This allows users to benefit from secure data exchange, remote monitoring, automated program transfers, and complete integration into smart factory ecosystems. Its precision is also notable, with welding current adjustable in ultra-fine increments of one-tenth of an ampere, ensuring optimal control over weld quality.
The P4 features a highly intuitive graphical user interface that simplifies the entire welding process. With comprehensive, multilingual help menus and program-guided workflows, operators can easily navigate from setup to execution. The GUI supports real-time monitoring of essential welding parameters and provides built-in tools for program archiving and documentation through USB or compatible printers. It is designed to guide users step-by-step, reducing training time and ensuring consistent operation even for less experienced welders.
The system’s rugged construction makes it ideal for onsite operations. Heavy-duty handles, reinforced housing, and a robust cooling system allow it to withstand challenging environments. Automatic welding head recognition and closed-loop regulation of torch rotation and wire feed contribute to unprecedented consistency and repeatability across welds.
Benefits and Features:
– Process: TIG DC, constant or pulsed, with/without filler wire
– Input Power: 115V / 230V ±10%, 50/60Hz (auto-range)
– Welding Current Ranges: 170A Model: 3-170A (230V) / 3-130A (115A) | 50A Model: 3-50A
– Precision: ±1A (≤100A) • ±1% (>100A)
– Duty Cycle: 170A @ 25% (230V) | 130A @ 40% (115V) | Continuous 100% duty cycle at reduced amerage
– Built-in closed-loop water cooling with safety valve
– Wireless 10.5″ touchscreen controller
– Wired 10.4″ quick-release touchscreen
– 4 USB ports
– Ethernet | Wifi antenna
– 24.8″ x 12.6″ x 19.7″ | 68.3lbs
Compatible Welding Heads
- UHP + MW Series
- Closed heads for high-purity tube-to-tube welding (no filler wire)
- MU Series
- Open heads for tube-to-tube welding (with or without filler wire)
- TS Series
- For tube-to-tubesheet welding



