PipePro™ 304
A quiet, compact, yet extremely powerful multiprocess diesel
engine driven unit designed especially for the cross country pipeliner and
mechanical contractor.
Weld At Idle provides up to 5000 watts of weld power (225 A at 23 V, 170 A at 30 V), and when more power is needed the machine automatically goes to high speed with no changes in the arc. Exceptional multiprocess arc. Excellent (uphill/downhill) bead (root), hot pass, fill and cap control on Stick welding. DIG control changes soft arc to stiff forceful arc that prevents electrode sticking. Lift-Arc™ TIG for DC welding without use of a HF unit for x-ray quality starts. MIG arc runs in a variety of modes with excellent results using any wire or flux core in the field. Inductance control customizes puddle for maximum performance. Patented dual-power option operates on engine or 230 volt single- or three-phase electric input power which eliminates fuel cost, noise, engine wear and emissions. High welding outputs to dominate larger diameter flux cored wires for increased deposition and Air Carbon gouging thru 1/4 in carbons. 12,000 watt voltage-regulated generator power allows tools, inverter welders or plasma cutters to run without affecting the arc while welding. One of the most fuel-efficient diesel machines. at 150 amps, 40% duty cycle, fuel consumption is only .42 gal/hour while welding at idle speed. The same weld output at weld speed uses only .61 gal/hour. Fuel capability is 13 gal to provide long runtime before refueling. Compact and lightweight designallows a smaller truck to be used and reduces transportation costs. Machine fits sideways in a standard pickup. Toolless top and side access allows easy and faster maintenance with little clearance space needed. Toolless remote oil drain is standard. Lift-Arc™
start provides TIG arc starting without the use of high frequency. Dual digital weld ammeter and voltmeter are standard. Amps or volts can be preset using the weld meters. Low noise operation allows for better work site communication and safety. Adaptive Hot Start™ for Stick
Every component in a Miller industrial engine drive is engineered and built to assure ultimate reliability in the most punishing conditions. What makes Miller Industrial Engine Drives so Tough?
72 db @ 7 m (no load - idle), 78 db @ 7 m (full load - high speed).
Automatically increases output amperage at the start of a weld should the start require it and prevents the electrode from sticking and creating an inclusion.
Stainless Steel model ideal for corrosive locations. Also has 120-volt Block Heater for easy starts in cold weather.
Engine = Kubota, 3-cylinder, liquid-cooled, diesel engine, 26 HP at 3750 RPM
Dual Power = Operates on engine or electrical input power.
SPECIFICATIONS
Rated Output at 104° F (40°C)
- 300 A at 32 V, 60% Duty Cycle
Output Power Range
- CC-DC: 5 - 400 A
- CV-DC: 10 - 34 V
Generator Power- rated at 104°F (40°C)
- 12,000 Watts, 1- or 3- Phase
Net Weight
- 910 lb (412 kg)
Engine
- Kubota 26 HP at 3600/2500 RPM (Diesel)
PROCESS
- MIG (GMAW)
- Pulsed MIG (GMAW-P) with optional Optima control
- Flux Cored (FCAW)
- DC Stick (DC SMAW)
- DC TIG (DC GTAW)
- Air Carbon Arc (CAC-A) Cutting and Gouging
- Air Plasma Cutting and Gouging (PAC) with Optional Spectrum Models
COMES COMPLETE WITH
- Machine Only
- Engine = Kubota, 3-cylinder, liquid-cooled, diesel engine, 26 HP at 3750 RPM
With the best coverage in the industry - Miller's True Blue® Warranty [PDF] delivers unparalleled peace-of-mind.

With a support system of more than 800 authorized service distributors world-wide - each staffed with factory trained, experienced and knowledgeable professionals - Miller provides you with the warranty service and genuine Miller replacement parts you require.
We understand that you need your machine as soon as possible. That is why we ensure a quick and reliable response, every time. Miller's Signature Service program guarantees to ship all available warranty items to your Miller service distributor's hands within 24 hours.
APPLICATIONS
Industrial Applications
- Process Plant Piping
- Pipe Welding
- Structural
- Fabrication
- Generator Power



