907384 - Miller PipeWorx 400 575V Multiprocess Pipe Welder

Ultimate Arc Control for Pipe Welders

The Miller PipeWorx 400 is built by welders, for welders, delivering a specialized multiprocess experience that handles every stage of pipe welding with precision. Rated at 400 Amps at 100% duty cycle, this 575V power source provides the relentless power needed for heavy-wall pipe fabrication without overheating or backing down. Whether you are welding carbon steel, stainless, or specialty alloys, the PipeWorx 400 offers optimized arc characteristics for Stick, DC TIG, MIG, and Flux-Cored processes.

The front panel is refreshing in its simplicity. Gone are the confusing menus and hidden sub-parameters; instead, you get clearly labeled, backlit controls that allow you to set up your weld in seconds. The machine's memory feature allows you to store four distinct programs for each process (Stick, DC TIG, and MIG), so you can instantly recall your preferred settings for different pipe schedules or positions.

What truly sets this machine apart is the arc performance. The RMD process provides a calm, stable short-circuit transfer that wets out the toes of the weld and bridges gaps effortlessly, giving you a consistent back bead on root passes. For fill and cap passes, the Pro-Pulse mode provides a stiffer, more focused arc that improves puddle control, especially in out-of-position welds. With the PipeWorx 400, you don't just get a power source; you get a partner that adapts to your workflow, automatically switching polarity and outputs so you can focus entirely on the puddle.