Railway Electrification Project Support

Corrosion Technical Support for Chengdu–Chongqing Railway Traction Power Equipment

This project relates to the traction power construction scenario of the Chengdu–Chongqing High-Speed Railway. It addresses the corrosion protection, interface coordination and operating-condition requirements associated with transformer equipment installed in outdoor railway electrification environments. The project focus was to translate site exposure conditions and transformer supporting requirements into practical coating, manufacturing and quality-control considerations.

Project Context and Operating Requirements

Railway traction power systems operate under variable electrical loads and are commonly deployed in outdoor locations. For transformer equipment and associated components, this creates a combined set of requirements involving rainfall, condensation, solar exposure, day-to-night temperature variation and elevated summer temperatures. Equipment integration also depends on the accurate coordination of structural dimensions, installation space and connection interfaces.

According to the available project information, the supporting equipment was intended for transformer application associated with Changtai Group and railway construction or electrification engineering customers. Key project considerations included matching the transformer interface dimensions, accommodating load fluctuations and supporting stable operation under high-temperature conditions.

Project Parameters

Project Type

Railway traction power supporting project

Application

High-speed railway electrification traction power

Coating Requirement

B05 coating system, 165 μm total dry film thickness

Protection Target

C3 medium-corrosivity environment

Project Reference

QYD R 50000/220

Provided Project Record

Model PC2600 (2200)-23 (3)/520; 20 units and 200 sets listed

C3 Corrosion Protection Approach

The project adopted a B05 coating configuration with a total dry film thickness of 165 μm, aligned with the protection objective for a C3 medium-corrosivity environment. Such conditions may be encountered in inland industrial towns, conventional outdoor substations and areas subject to light industrial pollution, where metal structures can be affected by rainwater, condensation, temperature changes and airborne contaminants.

For outdoor transformer supporting components, corrosion protection is not limited to broad flat surfaces. The coating design and inspection process should give particular attention to locations where moisture retention, mechanical impact or uneven coverage may increase local risk.

• Weld seams and heat-affected zones, where surface preparation and coating continuity require careful control.
• Edges, bends and structural transitions, where film build and coverage should be assessed.
• Lifting, fastening and transport-contact areas, which may be more vulnerable to handling damage.
• Areas exposed to standing water, condensation or pollutant accumulation, where protective continuity is especially important.

Interface Coordination and Installation Readiness

Railway traction power projects require close coordination between transformer equipment, supporting structures, installation clearances and connection interfaces. Prior to manufacture and delivery, relevant dimensions, assembly relationships, transport constraints and installation positions should be reviewed against the transformer drawings and the project technical documentation.

This coordination process helps reduce installation deviations and on-site adjustment requirements. Where transformer radiator components fall within TengQi Technology’s confirmed supply scope, collaboration may cover radiator dimensions, connection structures, coating requirements, manufacturing processes and agreed quality verification. Parameters relating to other product categories, including interface details or electrical performance, remain subject to confirmation by the relevant product manufacturer and project technical documents.

High-Temperature and Variable-Load Considerations

Outdoor exposure, summer heat and fluctuating traction power loads increase the importance of thermal management and equipment condition monitoring. For oil-immersed transformer radiator applications, structural integrity, protective surface condition and compatibility with the main equipment all contribute to long-term operating and maintenance considerations.

The project technical organization therefore considered the relationship between environmental protection and equipment integration. Coating requirements, structural details, handling protection and inspection criteria were treated as connected elements rather than isolated manufacturing requirements.

Implementation and Quality Verification Priorities

1. Confirm the actual product category and supply responsibility, and verify the technical documentation associated with model PC2600 (2200)-23 (3)/520.
2. Confirm the applicability of the C3 corrosivity classification and coating system for the specific project location and exposure conditions.
3. Document the B05 coating process, including surface preparation, coating system, film-thickness tolerance, colour and acceptance method.
4. Check interface dimensions, installation positions and supporting structures against the transformer general assembly drawings.
5. Define inspection and protective measures for welds, edges and handling-sensitive areas.
6. Complete agreed quality verification, such as appearance inspection, film-thickness measurement, adhesion testing and other contractually specified checks.
7. Prepare practical requirements for transport protection, on-site installation and local coating repair where applicable.

Project Value

• Environmental adaptability: a C3-oriented coating approach addresses the effects of outdoor rain, condensation, temperature variation and light industrial exposure.
• Supporting interface coordination: dimensional and structural checks support more efficient integration between transformer equipment and associated components.
• Focus on demanding operating conditions: high-temperature exposure and load variation are incorporated into the technical review of equipment support requirements.
• Verifiable corrosion-control requirements: coating coverage, dry film thickness and vulnerable areas can be incorporated into defined manufacturing and inspection criteria.
• Project delivery alignment: manufacturing, quality verification and delivery planning can be coordinated with the requirements of railway construction and electrification contracting projects.

TengQi Technology Support Scope

Jiangsu Tengqi Electric Power Technology Co., Ltd. operates under the brand TengQi Technology (TQT) and focuses on cooling technology for large oil-immersed transformers and reactors, intelligent manufacturing of plate radiators, and related lifecycle services. For confirmed transformer radiator and thermal management requirements, TengQi Technology can support technical consultation, product selection, design coordination, sample development, customized manufacturing, quality verification, delivery and after-sales technical support.

For railway traction power and other outdoor transformer supporting applications, TengQi Technology can work within its confirmed plate radiator and thermal management scope in accordance with customer specifications, equipment structures and actual operating conditions. The listed model, quantity and interface information in this project record require verification against the final technical agreement, product drawings and documents confirmed by the parties. Specific product configuration, coating system, performance parameters, delivery schedule and service scope are subject to the applicable project documentation.