Laha Offtake Station
- Heating duty
- Primary offtake station package
- Operating focus
- High-flow winter transmission support
- Cabinet access
- Single-front-door, wall-side installation
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China's Leading
Heating Manufacturer
China–Russia East Route Nenjiang Branch
- Category :Natural Gas Pipeline Heating
- Location :Heilongjiang, China
- Client :PipeChina Northern Pipeline
- Pipeline :Long-distance branch line
- Scope :three stations with heating packages
- Ambient :extreme-cold operating environment
3Stations
IndirectHeating
RemoteControl
Project Description
The Nenjiang Branch is a supporting branch of the China–Russia East Route natural gas pipeline in Heilongjiang. The route serves multiple stations in a severe winter environment where pressure regulation can create low-temperature operating risks for natural gas transmission.
XGTHERMAL supplied three horizontal indirect thermal-oil electric heating packages for the route. The systems were sized by station duty, with outdoor heater packages, indoor control cabinets, layered protection, industrial control and remote monitoring, and PIM-ready digital handover materials.
Station Configuration
Each station received the same indirect heating philosophy, while package configuration and control-cabinet access were matched to the station duty.
Nehe Offtake & Pigging Station
- Heating duty
- Mid-line offtake and pigging station package
- Operating focus
- Stable temperature lift after pressure regulation
- Cabinet access
- Front-and-rear maintenance access
Nenjiang Terminal Station
- Heating duty
- Terminal station package
- Operating focus
- Terminal delivery temperature management
- Cabinet access
- Single-front-door, wall-side installation
Challenge
The new stations needed a heating package that could operate reliably in a severe winter pipeline environment.
- Extreme-cold regional winter operating environment
- Freeze-block risk after natural-gas pressure regulation
- Hazardous-area equipment and high-integrity trip requirements
- Local operation plus remote SCADA coordination
Solution
The project used indirect thermal-oil heating to separate combustible gas from electric heating elements while keeping control logic consistent across all stations.
- Horizontal indirect thermal-oil electric heater packages
- Redundant temperature monitoring and staged overtemperature protection
- layered safety interlocks, emergency shutdown, and low-flow protection
- Indoor control cabinet with field-rated electrical enclosures
Operational Value After Commissioning
After commissioning, the three heating packages provide stable temperature-lift points for the Nenjiang Branch stations during the long winter operating season. By raising the outlet gas temperature after pressure regulation, the system helps reduce the risk of low-temperature freeze blockage and supports continuous gas delivery across the branch line.
The packages were selected around the actual station duties rather than treated as repeated standard units. This station-by-station sizing strategy keeps the installation philosophy consistent while avoiding unnecessary installed power at lower-flow locations.
Safety and Control Strategy
The project uses an indirect thermal-oil heating arrangement so that combustible natural gas is physically separated from the electric heating elements. For hazardous-area pipeline stations, this separation gives the control system clearer protection boundaries and reduces the risk associated with direct contact between gas and energized heating components.
Each heater package combines redundant temperature monitoring, staged overtemperature protection, a low-flow shutdown permissive, and a highest-priority emergency shutdown circuit. The protection logic is designed so that critical shutdown functions do not rely only on normal temperature-control operation. Local control remains available at the cabinet, while industrial communication allows station SCADA to exchange operating, alarm, remote start/stop, emergency shutdown, and energy-management data.
Digital Delivery and Lifecycle Support
Beyond the heater bodies, the delivery package included indoor control cabinets, explosion-protected junction boxes, low-temperature-rated power and signal cables, connection hardware, field instruments, installation accessories, commissioning spares, and maintenance tools. The field and cabinet enclosure strategy was selected for outdoor pipeline-station service and long-term maintainability.
The handover package also supported PipeChina-style lifecycle management through structured equipment data, as-built drawings, test reports, material certificates, a 1:1 three-dimensional model, QR code identification, and RFID asset tagging. This makes the case useful not only as a cold-climate heating project, but also as an example of packaged electric heating equipment supplied with digital documentation for long-term pipeline asset management.
Related Equipment Used in This Project
A directly relevant product family for natural gas pipeline heating and freeze protection.
