ENGINE WELDER | Mobile Welding Expert
Mobile Welding Equipment Supplier
Gasoline / Diesel / Battery Welding Generators · Pipeline Auto Welders · Welding Trucks
Beijing Engine Welder Technology Co., Ltd. (DENOH Group) specializes in mobile welding solutions. Our range covers gasoline and diesel engine-driven welders, battery-powered welding machines, welding trucks and pipeline automatic welding systems — widely serving oil & gas pipelines, urban pipe networks, steel bridges and emergency repair.
Why Choose ENGINE WELDER
Patented Dual-Torch Dual-Arc Welding
The DS series welds with two torches simultaneously — independent or combined output — doubling efficiency. Patented invention, proven on national key pipelines such as the West-East Gas Pipeline and China-Russia East-Line.
World-Class Engine Power
Engines from Kohler, Deutz, Cummins, Kubota, Yanmar, Mitsubishi and other world-renowned brands — global parts availability and easy servicing.
In-House IGBT Control Technology
All models carry our self-developed digital IGBT inverter control system: stable arc striking, precise current, low consumption and less spatter — beautiful, consistent weld beads.
Proven in Extreme Environments
Field-proven at -40°C, 4,500m altitude and +55°C heat. Low-noise design meets urban night-work requirements.
Battery Energy Storage Welding Line
EW-230 lithium welders deliver zero emission and zero noise; the HW420B hybrid saves 30-50% fuel. The new EW-EMS series covers 50kWh–5MWh — a pure-electric alternative for large mobile power in drilling and mining.
End-to-End Supply
One-stop supply from generators and welding power sources to DW pipeline welding tractors. Welding trucks deploy in 15 minutes — a complete mobile welding station for emergency repair.
Full Product Lineup
From field emergency repair to large oil & gas pipeline construction — a mobile welding solution for every scenario
Battery Energy Storage Welders
Energy Storage Mobile Welding Power · Built-in Welding · Zero Emission
EW-230/15kWh
Lightweight
- 230A constant current | 15kWh battery
- 9h+ runtime | 3kW AC output
- Touchscreen | Zero emission & noise (~140kg)
EW-230/18kWh
Long Runtime
- 230A constant current | 18kWh battery
- 11h+ runtime | 3kW AC output
- Touchscreen, smart heating | Maintenance-free (~165kg)
EW-230/21kWh
Extended Runtime
- 230A constant current | 21kWh battery
- 13h+ runtime | 3kW AC output
- Digital display | All-weather operation (~190kg)
HW420B
Hybrid Power
- 420A dual-torch combined | Battery + diesel hybrid
- 10kW auxiliary power | 30–50% fuel saving
- Flagship for pipelines & tanks
Gasoline Engine-Driven Welders
Gasoline Welding Generator · Portable · Induced Brushless
HW220
50-220A
- Mitsubishi/Robin/Yamaha/Kohler engines
- ~115kg | Induction brushless technology
HW230
40-230A
- Kohler/Mitsubishi/Yamaha | 3kVA aux power
- All-position welding | Electric + recoil start
- Municipal networks / construction sites
Diesel Engine-Driven Welders
Diesel Welding Generator · High Power · Industrial Grade
HW320DS
50-320A
- Kohler/Kubota/Yanmar | 10kVA
- Dual-torch simultaneous | Single-torch light duty
- Municipal networks / pipe prefabrication
HW450D
360A/200A
- Yanmar 3TNV88 | 15kVA
- Single-torch heavy load | Dual-torch doubling
- Pipe prefabrication / station construction
HW450DS
450A
- Kohler/Kubota/Yanmar | 12kVA
- Dual-torch dual-arc | Heavy-duty
- Oil & gas pipelines / tank construction
HW600DS
50-600A
- Deutz | 20kVA
- Dual-torch dual-arc | Industrial grade
- Long-distance oil & gas pipelines
HW800DS
50-800A
- Cummins | 25kVA
- Dual-torch dual-arc | Ultra-high power
- Ultra-large diameter pipelines
HW1000
50-1000A
- Deutz/Cummins | 25kVA
- Flagship ultra-high power output
- Large-diameter pipelines / energy projects
HW1200
50-1200A
- Deutz/Cummins | 30kVA
- Maximum-power flagship
- Large-diameter pipelines / energy projects
Engine-Driven Welding Trucks
Welding Truck · Mobile Welding Station · 15min Deployment
HW450D Welding Truck
4WD Pickup / Flatbed
- 15-min deployment | Heavy-duty config
- Field pipelines / emergency repair
HW1000 Welding Truck
4WD All-Terrain Truck
- 20-min deployment | Deutz/Cummins
- Large projects / long pipelines
Custom Solution
Build-to-Order
- Any HW series | Vehicle of your choice
- Custom integration
Pipeline Automatic Welders
Pipeline Auto Welder · Full-Position · Automated
DW48/56-8H-D Flexible Internal Welder
Φ1219–1422mm | 8 welding stations
- High-torque servo drive + hydraulic clamping + EM brake
- Mountainous terrain | Root pass ≤5 min
DW-EH48/56 Lithium Internal Welder
Φ1219–1422mm | Wireless remote
- Battery drive, no cables | No external power needed
- Field mountain repair | One pass ≤90s
DW-EW-I Single-Torch External Welder
Toothed steel rail | Adaptive parameters
- Lightweight tractor | Auto all-position setup
- Shop prefabrication & field welding
DW-EW-II Dual-Torch External Welder
Dual-torch sync | Auto arc tracking
- Straight/angle weave | 2× efficiency
- High-grade long pipelines | Key energy projects
Mobile Energy Storage Series
Energy Storage Mobile Power · External Welder Compatible · Oil&Gas/Mining
EW-EMS-P Portable Series
50~241kWh | 25~125kW
- ≤2.5t trailer deployment, no crane
- Smart air cooling, 6,000 cycles
- IP54, zero emission, silent
- Telecom backup / municipal repair / surveying
EW-EMS-M Medium Series
431~964kWh | 250~500kW
- Smart liquid cooling, cell ΔT ≤3°C
- ≥8,000 cycles, IP54 + C4 anti-corrosion
- 1500V platform, MCS fast charging
- Well sites / industrial parks / HDV charging
EW-EMS-H Heavy-Duty Series
1.67~4.18MWh | 836~2090kW
- 20ft container, 1331V platform
- 3-level BMS + AI thermal-runaway alert
- GB/T 36276 certified, ≥93% efficiency
- Drilling rigs / mines / temporary power
EW-EMS-D Drilling Series
3.45–4.31MWh/bay | Split architecture
- Split battery bay + PCS bay architecture
- -40°C operation, black-start capable
- ZJ50/ZJ70 rigs, workover, fracturing
- Oilfield electrification, 30–50% cost saving
Industries & Solutions
ENGINE WELDER mobile welding equipment serves energy, transportation, construction, mining and water conservancy — reliable support for every engineering project.
Oil & Gas Pipelines
National key pipelines such as West-East Gas Pipeline, China-Russia East-Line and China-Myanmar pipeline. Patented dual-torch dual-arc welding doubles efficiency.
Power & Energy Engineering
Full-scenario welding for the power industry: transmission & substation field welding, power plant construction and maintenance, grid upgrades — stable, reliable mobile welding support.
Municipal & Building Construction
Urban water, gas and heating networks, steel bridges and building structures. Welding trucks deploy in 15 minutes — on call, rapid response.
Wind Power Construction
Welding solutions for wind farm construction, turbine tower welding, foundations and O&M. HW diesel welders are altitude- and cold-verified for harsh wind farm sites.
Solar PV Structure Welding
PV station structures, combiner boxes, cable laying and substation construction. Zero-emission battery welders suit rooftop and densely populated sites.
Energy Storage Construction
Storage station construction, battery bay installation, cable laying and PCS welding. Zero emission, zero noise — ideal for indoor and confined spaces.
Hydropower & Water Conservancy
Hydropower stations, dams, gate welding and water conveyance pipelines. Waterproof, dustproof design with IP23+ protection for humid environments.
Mining & Emergency Rescue
Mine equipment maintenance, tunnel support and underground welding. Zero-emission battery welders keep underground air safe; heavy-duty HW series handles harsh mining conditions.
Railway Construction
Rail welding, bridges, station building, electrification and tunnels. All-terrain, altitude- and cold-verified — a long-term supplier to railway construction.
Shipbuilding & Offshore
Ship repair and building, offshore platforms, subsea pipelines and marine structures. HW series passes strict salt-spray tests with anti-corrosion design for marine standards.
Heavy Machinery Maintenance
Maintenance of excavators, loaders and cranes; steel structure, shaft and hydraulic repairs. EW-230 delivers 230A for uninterrupted large-electrode welding.
Emergency Rescue & Field Construction
Disaster relief, infrastructure repair, pipe bursts and accident rescue. Welding trucks deploy in 15 minutes — wherever there is a road, there is power and welding.
Core Technology
Patented Dual-Torch Dual-Arc Welding
Patented dual-torch simultaneous welding, 2× efficiency
Digital IGBT Inverter Technology
In-house developed: stable arc, precise current, low consumption
Hybrid Energy Storage Technology
Stores at idle, releases for welding — 30–50% fuel saving
All-Terrain Design
Verified from -40°C cold to 4,500m altitude
EMS Mobile Energy Storage
314Ah LiFePO4, 8,000 cycles, IP54 + C4, smart liquid cooling
Need Expert Selection Advice?
Our engineering team provides one-on-one technical consultation and product selection support anytime