As long-distance oil and gas pipelines extend into mountains, hills, and high-altitude terrains, the efficiency and quality bottlenecks of traditional manual welding have become increasingly apparent. ENGINE WELDER’s pipeline automatic welding machine series offers a complete internal + external welding product matrix, providing a systematic automated welding solution for complex pipeline construction.
Internal Welding Breakthrough: Flexible + Lithium Dual Solutions
Internal girth welding — the most critical root pass in pipeline construction
DW48/56-8H-D Flexible Pipeline Full-Automatic Internal Welding Machine
Designed for complex conditions in mountainous and hilly terrain, featuring high-torque servo drive + hydraulic expansion + electromagnetic braking. Compact body passes through 5/6D bend curvature; 8 welding units complete root pass in approximately 5 minutes with welding time ≤120s. Operating temperature -50°C to 65°C, altitude 0-3500m.
DW-EH48/56 Lithium Battery Pipeline Full-Automatic Internal Welding Machine
Lithium-powered + hydraulic control with wireless remote operation, free from cable constraints. Designed for off-grid field and mountain scenarios. Single-pass welding ≤90s, passes 5D lateral 90° / longitudinal 30° bends. Adapts to altitude ≤4000m, temperature -40°C to 65°C, humidity ≤90%.
External Welding Upgrade: Single-Torch Precision + Dual-Torch Efficiency
External girth weld fill and cap — the dual pursuit of precision and efficiency
DW-EW-I Single Torch External Welding Machine
Perforated steel rail + lightweight welding carriage with auto-adjusting welding parameters by position. Full-position welding consistency ensured by intelligent control. Visual touchscreen for parameter setting, storage, and data transfer. Suitable for both prefabrication yards and field construction.
DW-EW-II Dual Torch External Welding Machine
Featuring dual-torch coordinated control + automatic arc tracking, with flexible switching between straight and angular oscillation modes. Digital communication between welder and control box, integrated control design doubles efficiency while ensuring uniform, flat welds. Multi-channel process data storage and export, universal consumable design reduces operating costs. Built for high-grade long-distance pipelines and major energy projects.
Applications
- Long-distance oil & gas pipelines — mountains, hills, deserts
- Urban utility tunnels & municipal networks — prefabrication and field
- Chemical park pipelines — high-standard welding quality
- Emergency repair — lithium solution for off-grid instant welding
- High-altitude pipelines — stable operation at 4000m elevation
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