PipeWorx 350 FieldPro™ (Tweco)

Multiprocess Pipe Welding System

PipeWorx 350 FieldPro™ (Tweco) ​




Simplicity-driven performance for your constuction site. Designed exclusively for onsite pipe welding.







 PipeWorxFieldPro™ - English



Pulsed MIG (GMAW-P) Flux Cored (FCAW)

Air Carbon Arc Cutting and Gouging (CAC-A)
(1/4-inch carbons





PipeWorx 350 FieldPro™

Pipe Welding Field Operations

Process piping




HVAC and water pipe

Input Voltage

230 V -575 V

Input Hz

50/60 Hz

Input Phase

1- and 3-Phase

Input Amperage

3 Phase – 350 A at 34 VDC, 60% duty cycle

1 Phase - 300 A at 32 VDC, 60% duty cycle

Stick (SMAW)

40-350 A


10-350 A


10-44 V

Weld Output



Net Width

12 in (432 mm)

Net Height

17 in (305 mm)

Net Length

22 in (559 mm)

Net Weight

100 lbs (45.4 kg)


*Welding with the smart feeder requires the PipeWorx 350 FieldPro to be hooked up to three-phase power





Auto-Line™ Power Management Technology

Allows for any input voltage hookup (208-575 VAC, single- or three phase) with no manual linking, providing convenience in any job setting,. Ideal solution for dirty or unreliable input power. Learn More


Simplified cable management

Save time by eliminating the need to trace cables back to change welding parameters and processes. No control cables to string and manage on the jobsite.


Complete control at the weld joint

FieldPro remote reduces weld defects by automatically setting correct polarity for each welding process — without the need to manually swap cables.

Eliminates the need to “get by” with less than optimal settings without control cables, and allows for easy setup of a new weld process with the touch of a button.

Total remote control of welding processes and parameters improves safety by limiting jobsite movement and reducing slip, trip and fall hazards.


Arc performance optimized for critical pipe welding

Industry-leading arc performance like the PipeWorx 400 welding system, but in a field-ready package.
True multiprocess system provides conventional stick, TIG, FCAW, and MIG welding as well as the advanced technologies of RMD and pulse.
Smart feeder delivers excellent RMD and pulse welding up to 200 feet away from the power source with no control cables. RMD and pulse processes also help reduce weld failures and eliminate backing gas on some stainless and chrome-moly applications.

New durability standard for field construction

Designed and built to withstand the harshest field environments.