Standard features include: digital preset weld meters, outputcontactor control, automatic idle and 120-volt block heater.

ProcessesStick (SMAW)MIG (GMAW)Flux-Cored (FCAW) DC TIG (GTAW) Air Carbon Arc (CAC-A) Rated: 1/4-inch (6.4 mm) carbons

Heavy IndustrialApplicationsPipe Welding Mechanical Contractor

Issued June 2015 • Index No. ED/5.4

LINE-X® cover is workbench tough and provides superior impact,corrosion and abrasion protection.

Infinite arc control allows the arccharacteristics to be changed forspecific applications in Stick and MIG.

Superior arc performance • Adjustable arc control• Hot Start™ (Stick)• FCAW/MIG arc performance• Lift-Arc™ TIG with Auto-Stop™

Auto Remote Sense™ (ARS) detects if a remote control is plugged into the 14-pin receptacle and eliminatesconfusion of a remote/panel switch.

Welder/generator is warranted by Miller for 3 years, parts and labor.Engine is warranted separately by engine manufacturer.

Output Range DC Stick 20 – 400 A FCAW/MIG 14 – 40 V DC TIG 20 – 400 A

Generator Output Rated at 104° F (40° C)12,000 watts peak, 10,000 watts continuous

The professional welder’s choice—designed exclusively for transmissionpipeline work, the Big Blue 350PipePro offers Stick as well asMIG/FCAW welding capabilities tomeet high-strength steel requirementsand is ideal for the most demandingpipeline jobs.

The Vault — ultimate controlboard reliability. See page 4.

Mitsubishi S4L2 four-cylinder diesel.

Heavy-duty low-speed industrialengines are designed to operateover 10,000 hours before the firstbasic overhaul. Backed by worldwidesupport and service.

Engine coolant temperature gaugeand meter maintenance displays• Fuel gauge• Hour meter function• Oil change interval• High coolant temperature and

low oil pressure shutdowns • Low fuel shutdown — engine

shuts down before system runsout of fuel, making restarts easy

Easy to use. Simple controls makeit easy to setup and weld!

Low OCV Stick (VRD) reduces theopen-circuit voltage to 15 volts whenthe welding power source is not inuse, increasing operator safetywithout compromising arc starts.

Optional stainless steelappearance package providesadditional exterior protection towithstand corrosive environments.

Caterpillar C1.5T three-cylinder diesel.

Miller Electric Mfg. Co.An ITW Welding Company1635 West Spencer StreetP.O. Box 1079Appleton, WI 54912-1079 USA

MillerWelds.comEquipment Sales US and CanadaPhone: 866-931-9730FAX: 800-637-2315International Phone: 920-735-4554International FAX: 920-735-4125

Big Blue®350PipePro® Diesel Engine-Driven Welder/AC Generator

QuickSpecs

USA model shown.

Performance Data

2

Specifications (Subject to change without notice.)

FUEL CONSUMPTION CURVE

0.00

0.25

0.50

0.75

1.00

1.25

1.50

0 50 100 150 200 250 300 350 400

US

GAL

./HR.

0.00

0.95

1.89

2.84

3.79

4.73

5.68

LITE

RS/

HR.

DC WELD AMPERES AT 100% DUTY CYCLE

SIMULTANEOUS WELDING AND POWER

25A

75 A

125 A

175 A

225 A

300 A

350 A

Weld Amperes

Total Aux. Power Available (Watts)

10,000

10,000

10,000

9,000

7,500

4,500

1,000

120 V

83.3

83.3

83.3

75

62.5

37.5

8.3

240 V

41.6

41.6

41.6

37.5

31.3

18.8

4.2

Idle

*Sense voltage for Stick and Lift-Arc™ TIG. **Additional 82 lb. (37 kg) when fuel tank is full.

Certified by Canadian Standards Association to both the Canadian and U.S. Standards. Meets NEMA and IEC output ratings.

Engine Specifications (Engines warranted separately by the engine manufacturer.)

Engine Brand

Caterpillar C1.5T

Mitsubishi S4L2

Features

EPA Tier 4 Final compliant

EPA Tier 4 Final compliant

HP

24.7

24.7

Type

Three-cylinder, liquid-cooledindustrial diesel

Four-cylinder,liquid-cooledindustrial diesel

Engine Speeds

Weld: 1800 RPM Idle: 1500 RPM

Weld: 1850 RPMIdle: 1500 RPM

Capacities

Fuel: 11.5 gal. (43.5 L)Oil: 5.9 qt. (5.6 L)Coolant: 7.2 qt. (6.8 L)

Fuel: 11.5 gal. (43.5 L)Oil: 5.8 qt. (5.5 L)Coolant: 10 qt. (9.5 L)

Automatic Engine Shutdown

Low oil pressure, high coolant temperature,low fuel level

CAT powered International model is approved.

Weld Mode/Process

CC/DC(TIG)

CC/DC(Stick)

CV/DC(FCAW/MIG)

WeldOutputRange

20 – 400 A

20 – 400 A

14 – 40 V

Weld Output Rated at 100% Duty Cycleat 104˚ F (40˚ C)

300 A at 32 VDC350 A at 27 VDC400 A at 24 VDC

Max. Open-CircuitVoltage

85 VDC15 VDC*

Generator Power Output Rated at 104˚ F (40˚ C)

12,000 watts peak,10,000 watts continuous

1-phase, 84/42 A,120/240 VAC, 60 Hz

Dimensions

H: 32 in. (813 mm)

W: 26.25 in.(667 mm)

D: 56 in. (1422 mm)

Weight(without fuel)**

CATNet: 1063 lb. (482 kg)Ship: 1113 lb. (505 kg)MitsubishiNet: 1018 lb. (462 kg)Ship: 1068 lb. (484 kg)

Sound Levels at Rated Output, 23 ft. (7 m)

CATIdle: 65 dB (90 Lwa)Weld: 71.2 dB (96 Lwa)MitsubishiIdle: 68.7 dB (93 Lwa)Weld: 72.1 dB (97 Lwa)

3

Function Guide 1. Weatherproof Lexan® Nameplate is super

durable and resists cracking and fading.Color coding is for ease of operation.

2. Self-Calibrating Digital Weld Meters withFault Code Indication display preset oractual weld parameters.

3. Hot Start™ provides positive Stick electrodestarts making it easy to start all types of electrodes and it also works great forbead tie-ins.

4. Great FCAW/MIG Performance and Arc Starts make the Big Blue® 350PipePro’s arc best in its class. Easy to runall wires from .023-inch solid wires to large-diameter 5/64-inch flux-cored wires.

5. Lift-Arc™ TIG with Auto-Stop™

6. Adjustable Arc Control adjusts DIG whenprocess control is in Stick mode and adjustsinductance when process control is inFCAW or MIG mode. The amount of DIGdetermines how much amperage (heat)varies with Stick arc length. Inductancedetermines the “wetness” of the weld puddle.

7. Standard 14-Pin Receptacle for simpleconnection of remote controls and wirefeeders. It features Auto Remote Sense™

which automatically switches from panel toremote amperage/voltage (A/V) control withremote connected. Eliminates confusion ofthe Panel/Remote A/V switch.

8. Engine Coolant Temperature Gaugedisplays coolant temper ature. Engine stopsif temperature exceeds 230˚ F (110˚ C).

9. Meter Maintenance Display shows fuellevel, engine hours, oil change interval andhi temp/low pressure/low fuel shutdowninformation.

Low Fuel Shutdown shuts engine off priorto running out of fuel to prevent loss of fuelin the system, and make restarts easy.Display will read noFUEL. Turn the machineoff, add fuel, and restart.

10. Glow Plugs assist in cold weather starting.

11. Engine Control Switch is used to start theengine and then select between Auto Idleand High Speed Lock.

12. Amperage/Voltage Adjust Control

13. Weld Output Terminals

29

10

8

11

12

13

3

6

7

4

5

1

ARC START with Lift-Arc™

Lift at any angleTouch or scratchShielding

gas

Shieldinggas

Arc

Workpiece

ARC END with Auto-Stop™

While welding

Shieldinggas

Arc

For Auto-Stop, lift up to terminate arc

Arc endswithout

flare

Move backdown to

maintain gascoverage

Lift up until arc

ends

Workpiece

• Eliminates need fora remote control

• Maintains shieldinggas coverage

• Eliminates tungstenand workpiececontamination

• Eliminatesunwanted arcstrikes outside theweld area

• Reduces or eliminates sticking• Reduces or eliminates electrode/

work contamination• Low open-circuit voltage

USA Model

International Model Receptacles

240 V, 16 A AC Receptacle

120 VAC, 20 A GFCI Receptacles

120/240 VAC, 50 A Receptacle

Circuit Breakers

Earth LeakageCircuit Breaker

120 V, 20 A AC Receptacle with

Ground Fault

120 V, 16 A AC Receptacle

4

Rigorous Testing forTough, Real-WorldConditionsTo prove our machines go to thelimit, Miller industrial engine drivesare put to the test in very extremeenvironmental conditions.

• Airborne dust and sand. Criticalcomponents are exposed toabusive airborne particles in aspecial testing chamber for weeks,helping make sure they’ll operatewhile facing extreme levels of dirt,dust or sand on the jobsite.

• Humidity and corrosion. Insideour Houston testing room, criticalcomponents are subjected toextended moisture and corrosivesalt exposure to ensure they’ll runeven when exposed to humidclimates, corrosive coastalenvironments, and driving rain.

• Temperature extremes. Miller industrial engine drives are tested to ensure performance in scorching heat. All Miller engine-drivenmachines are weld rated at 104 degrees Fahrenheit, but actual tests areconducted up to 122 degrees Fahrenheit to assure peak performance.

• Jobsite/over-the-road abuse. Miller industrial engine drives areshaken for hours on transportation bed simulators, subjected to severevibration, and test-dropped and jerked to ensure they’ll withstand thestresses that can shut down competitive machines.

• Continuous operation. Miller industrial engine drives run day andnight, in all weather conditions, to assure they’ll perform withoutinterruption in the field.

Superior Circuit Board DesignOur critical circuit boards are engineered to carry low power and lowheat to reduce thermal stress and minimize expansion and contraction.In contrast, our competitor’s boards carry high power and high heat,making them more vulnerable to failure.

What Makes Miller® Industrial Engine Drives So ?

“The Vault” Makes Upgrading to Miller CC/CVUnits Worry-FreeConcerns with circuit board reliability have resulted in some operatorssteering clear of CC/CV welder/generators — even though they offer a superior arc and multiple welding processes. Miller circuit boardreliability isn’t a concern since all Big Blue multiprocess industrialengine drives feature the Vault.

Created out of two aluminum halves sealed with silicone, as well aswatertight harness connections, the Vault provides a clean circuitboard environment, protecting the electronics — and controllingoutput — in heavy industrial applications. No other competitorprotects their electronics with a sealed vault, leaving critical circuitboards exposed to harsh elements that can disrupt the machine’selectronics, and therefore, its operation.

“The Miller 350 PipePro makes my job easier every day. It runs a3/16 electrode downhill smoother and keeps it lit better than anymachine I’ve used.”

Jerry Morley, Gas Field Specialists Inc,Plumbers and Steamfitters #267

Why Industrial EngineDrive Customers Choose MillerThe ultimate test of Miller reliabilityis how it performs in the field. Thequote on the left provide a glimpseof how Miller industrial enginedrives perform for customers. Read the full stories, and manyothers demonstrating our superiorreliability, at MillerWelds.com.

5

Genuine Miller® Accessories

Adapter Cord, Full KVA #300 517 FieldNEMA 14-50P to NEMA 6-50R. Adapts enginedrive 120/240 V plug to common Millermatic®

and Spectrum® 240 V plug.

Full KVA Plug Kit #119 172 Field120/240 VAC, 50 A plug (NEMA 14-50P) to fit full KVA receptacle.

International Plugs Field#255 419 1-Phase,120 VAC, 16 A plug#255 416 1-Phase,240 VAC, 16 A plug

Engine Filter Kits #246 987 Field. For CAT#253 901 Field. For Kubota#252 782 Field. For MitsubishiIncludes all filters required for proper enginemaintenance. Oil filter, primary and secondaryfuel filter, and primary air filter.

Spark Arrestor (Muffler) Kit #300 585 FieldPrevents particles from leaving the muffler thatcould potentially start a fire. Mandatory whenoperating on California grasslands, brush, orforest-covered land, and all national forests. Forother areas, check your state and local laws.Meets U.S. Forest Service Standard 5100-1B.

FA-1D Lockable FlameArrestor Fuel Cap #043 947 FieldFuel cap can be padlocked toprevent vandalism. A built-inflame arrestor prevents flamesor sparks from entering the fuel tank.

Chalwyn Safety Valve #300 576 Field. For MitsubishiShuts off air flow to the engine to prevent over-speed condition. Required on many petroleumjobsites, this valve provides both manual andautomatic operation giving you two methods ofoperation to meet jobsite compliance standards.

Protective Cover#195 301 FieldBlue water-resistantcover with Miller logoresists stains andmildew, and protectsthe finish of yourwelder.

Stick (SMAW) Welding

Weld Leads2/0 Stick Cable Set, 50 ft. (15 m) #173 851Consists of 50-foot (15 m) 2/0 electrode cablewith holder, and 50-foot (15 m) work cable withclamp. 350 A, 100% duty cycle.

2/0 Stick Cable Set, 100/50 ft. (30.5/15 m)#043 952Consists of 100-foot (30.5 m) 2/0 electrodecable with holder, and 50-foot (15 m) workcable with clamp. 300 A, 100% duty cycle.

MIG (GMAW) or Flux-Cored (FCAW)

SuitCase® X-TREME™ 8VS Wire Feeder #951 583 With Bernard™ Q300 MIG gunSuitCase® X-TREME™ 12VS Wire Feeder #951 544 With Bernard™ Dura-Flux™ gunLightweight, voltage-sensing wire feedersinclude secondary contactor, gas valve, drive rollkit and gun. See Lit. Index No. M/6.42.

SuitCase® 12RC WireFeeder #951 580Lightweight and flexibleenough to run a variety ofwires up to .062-inchdiameter. Includes remotevoltage control, drive roll kitand Bernard™ Q300 MIG gun.See Lit. Index No. M/6.5.

MIG (GMAW)/Flux-Cored (FCAW) GunsSee Bernard™ Lit. Index No. SPEC DFP-1.2 forDura-Flux™ PipePro gun. See Lit. Index Nos.AY/15.0, 16.0 and 17.0 for Miller guns.

Spoolmatic® 30A Spool Gun #130 831Air-cooled, 200-amp, one-pound spool gun foraluminum MIG. See Lit. Index No. M/1.73.Requires WC-24 Control (#137 549).

XR™ Wire Feeders and GunsPush-pull system designed to handle difficult-to-feed soft alloy wires such as aluminum. See Lit.Index No. M/1.7– M/1.74.

TIG (GTAW) Welding

Dynasty® 200 Series #907 099, #907 099 011 For premium portable AC/DC TIG arc quality. See Lit. Index No. AD/4.8.

HF-251 Series #042 388HF-251D-1, 115 VACHigh-frequency arc starterand stabilizer. See AccessoryLit. Index No. AY/5.0.

Multiple Operator Welding

The XMT 350, CST 280 and Dynasty 200 powersources can be run off the machine’s generatorto provide two arcs with only one engine. Thereis no arc interaction under 180 amps.

XMT® 350 Series #907 161, #907 224,#907 366See Lit. Index No. DC/18.83and DC/18.84.

CST™ 280 #907 244, #907 244 011#907 251, #907 251 011See Lit. Index No. DC/29.55.

Plasma Cutting

Spectrum 375 X-TREME and 625 X-TREME shown.

Spectrum® 375 X-TREME™ #907 529See Lit. Index No. PC/9.2.Spectrum® 625 X-TREME™ #907 579See Lit. Index No. PC/9.6.Spectrum® 875 #907 583See Lit. Index No. PC/9.8.

The Spectrum 375 X-TREME and 625 X-TREMEcome complete with protective X-CASE™

(not shown).

FemaleReceptacle

6

4 holes F

Front Panel

C

ED

A B

HWY-224 Trailer #043 805 A 2650-pound (1202 kg) capacity trailer forhighway use. Welded steel tubing frame, heavy-duty axle with roller bearing hubs andleaf-spring suspension. Includes jack stand, 2-inch (50 mm) ball hitch, fenders and lights.

Cable Tree #043 826Provides an area to conveniently wrap weldcables and extension cords.

Dual Hitch #300 8312-inch (50 mm) ball hitch and 3-inch (76 mm)lunette eye in one reversible assembly.

Trailers and Hitches (Note: Trailers are shipped unassembled.)

Remote Controls

Wireless Remote HandControl #300 430For remote current, voltageand contactor control.Receiver plugs directly intothe 14-pin receptacle of Miller

machine. 300-foot (91.4 m) operating range.Requires Wireless Antenna Kit #300 749.

Wireless Antenna Kit #300 749Required for Pro Series engine drives. Optionalon other compatible Miller products whereimproved reception is desired.

PRHC-14 Hand Control#195 511Complete current orvoltage control brings 120 V GFCI power to workarea in a single cord.Housed in durablealuminum case and

includes 125-foot (38 m) cord with plugs.

Extension Cables for 14-Pin Remote Controls or 24 VAC Wire Feeders#242 208 025 25 ft. (7.6 m)#242 208 050 50 ft. (15.2 m)#242 208 080 80 ft. (24.4 m)

Genuine Miller® Accessories (Continued)

A. 27.75 in. (705 mm)B. 26.25 in. (667 mm)C. 52 in. (1321 mm)D. 2 in. (51 mm)E. 56 in. (1422 mm)F. .562 in. (14 mm) diameter

Height: 32 in. (813 mm)Width: 26.25 in. (667 mm)Depth: 56 in. (1422 mm)

Mounting Specifications

Trailer Specifications (Subject to change without notice.)

Gross VehicleWeight Rating

2960 lb.(1343 kg)

Gross AxleWeight Rating

3500 lb.(1588 kg)

Height of Bed

18.5 in.(470 mm)

RoadClearance

7.25 in.(184 mm)

NetWeight

320 lb.(145 kg)

Track (Centerto center oftires)

52 in.(1321 mm)

Standard Tires(Standard ratingor P-size rating)

B78-13

Dimensions

Length: 105 in. (2667 mm)Width: 59.5 in. (1511 mm)*

*Width at outside of fenders.

Model

HWY-224

NetPayload

2650 lb.(1202 kg)

7

14-Pin PRHC-14Wireless Remote

Hand Control

14-Pin RHC-14Wireless Remote

Hand Control

Stick ElectrodeRemote Control

OR

Work

Stick ElectrodeRemote Control

OR

Work

SuitCase12RC

Lift-Arc TIG

Work

Flux-Cored or MIG Gun

Flux-Cored or MIG Gun

Voltage-Sensing Feeder

Spoolmatic 30A Gun

Or OtherHigh-Frequency Starting Aid

Work

14-Pin

14-PinWC-24

TIGTorch

Work

14-Pin

HF-251D-1

TIG Torchwith Valve

Work

Work

SuitCaseX-TREME8VS/12VS

Stick (SMAW) Basic EquipmentPRHC-14 #195 511Wireless Remote Hand Control #300 430Wireless Antenna Kit #300 749

Electrode Hot

Remote On/Off Required

Stick (SMAW) Basic EquipmentRHC-14 #242 211 020Wireless Remote Hand Control #300 430Wireless Antenna Kit #300 749

Flux-Cored/MIG (FCAW/GMAW) Basic EquipmentSuitCase® X-TREME™ 8VS #951 583SuitCase® X-TREME™ 12VS #951 544

Flux-Cored/MIG (FCAW/GMAW) Basic EquipmentSuitCase® 12RC #951 580

Aluminum MIG (GMAW) Basic EquipmentSpoolmatic® 30A #130 831WC-24 #137 549

TIG (GTAW) Basic EquipmentHF-251D-1 #042 388*Dynasty® 200 SD #907 099Dynasty® 200 DX #907 099 011

*TIG power cable adapter required

Lift-Arc™ TIG (GTAW) Basic Equipment

Typical Installations

Equipment and Options Stock No. Description Qty. Price

Big Blue® 350 PipePro® #907 478 CAT Turbo. USA model #907 478 001 CAT Turbo. USA model with Stainless Steel Package #907 428 Mitsubishi. USA model #907 428 001 Mitsubishi. USA model with Stainless Steel Package

Big Blue® 350X PipePro® #907 530 CAT Turbo (CE). International model #907 527 Mitsubishi. International model

Field Accessories

USA Model Adapter Cord, Full KVA #300 517

USA Model Full KVA Plug Kit #119 172 1-phase, 120/240 VAC, 50 AInternational Plugs #255 419 1-phase, 120 V, 16 A #255 416 1-phase, 240 V, 16 A

Engine Filter Kits #246 987 For CAT. Includes air, oil and fuel filters #252 782 For Mitsubishi. Includes air, oil and fuel filtersSpark Arrestor (Muffler) Kit #300 585

FA-1D Lockable Flame Arrestor Fuel Cap #043 947

Chalwyn Safety Valve #300 576 For MitsubishiProtective Cover #195 301

Stick Welding Leads See page 5

MIG/Flux-Cored Welding

SuitCase® X-TREME™ 8VS #951 583 With Bernard Q300 MIG gun. See Lit. Index No. M/6.42SuitCase® X-TREME™ 12VS #951 544 With Bernard Dura-Flux gun. See Lit. Index No. M/6.42SuitCase® 12RC #951 188 With Bernard Q300 MIG gun. See Lit. Index No. M/6.5Bernard™ PipePro Dura-Flux™ Gun (FCAW) #301 011 Has built-in dual schedule switch. See Bernard Lit. No. SPEC DFP-1.2MIG (GMAW) and Flux-Cored (FCAW) Guns See Lit. Index Nos. AY/15.0, AY/16.0 and AY/17.0 for Miller gunsSpoolmatic® 30A Spool Gun #130 831 Requires WC-24 Control. See Lit. Index No. M/1.73WC-24 Control #137 549 See Lit. Index No. M/1.5XR™ Wire Feeder Control and Guns See Lit. Index No. M/1.7– M/1.74

TIG Welding

Dynasty® 200 SD #907 099 Basic controls for AC/DC TIG/Stick, 120–460 VAC. See Lit. Index No. AD/4.8Dynasty® 200 DX #907 099 011 Full feature controls for AC/DC TIG/Stick, 120–460 VAC. See Lit. Index No. AD/4.8HF-251D-1 #042 388 115 VAC. See Lit. Index No. AY/5.0

Multiple Operator Welding

XMT® 350 Series #907 161 CC/CV model w/Dinse-style connectors. See Lit. Index No. DC/18.83 #907 224 VS model w/Tweco®-style connectors. See Lit. Index No. DC/18.83 #907 366 MPa model w/Dinse-style connectors. See Lit. Index No. DC/18.84CST™ 280 CC/DC #907 244 220-230/460–575 VAC w/Dinse-style connectors. See Lit. Index No. DC/29.55 #907 244 011 220-230/460–575 VAC w/Tweco®-style connectors. See Lit. Index No. DC/29.55 #907 251 208-230/400–460 VAC w/Dinse-style connectors. See Lit. Index No. DC/29.55 #907 251 011 208-230/400–460 VAC w/Tweco®-style connectors. See Lit. Index No. DC/29.55

Plasma Cutting

Spectrum® 375 X-TREME™ #907 529 Includes X-CASE™. See Lit. Index No. PC/9.2Spectrum® 625 X-TREME™ #907 579 Includes X-CASE™. See Lit. Index No. PC/9.6Spectrum® 875 #907 583 See Lit. Index No. PC/9.8

Remote Controls See page 6

Trailers and Hitches HWY-224 Trailer #043 805 Trailer with lights, fenders and 2-inch (50 mm) ball hitch. For highway useCable Tree #043 826 Trailer-mounted cable holder for HWY-224Dual Hitch #300 831 Combination 2-inch (50 mm) ball hitch and 3-inch (76 mm) lunette eye in one reversible assembly for HWY-224

Date: Total Quoted Price:

Ordering Information

© 2015 Miller Electric Mfg. Co.

Distributed by: