A galvanized and painted composite coating system was specified to address salt mist, humidity, and chloride exposure risks in coastal operating environments.
C5 Corrosion Protection
Radiator connection interfaces were adapted to coordinate with transformer connection dimensions, installation space, and site assembly requirements.
Customized Interface Design
The radiator configuration was coordinated with the project’s transformer cooling requirements for ambient temperatures that can reach 40°C.
High-Temperature Condition Support
The supply covered panel radiators for six transformers, aligning product configuration, interface requirements, and coating specifications for the grid substation application.
Coordinated Project Supply
Project Album
Project Overview
The ENEL Italy grid project supports transformers for sectionalizing substations, where operating conditions must address both high summer temperatures and the risk of coastal salt spray corrosion. Under the TengQi Technology (TQT) brand, Jiangsu Tengqi Electric Power Technology Co., Ltd. provided customized manufacturing and corrosion-protection coating solutions for oil-immersed transformer panel radiators. The project covers six BKSZ-40000/150 transformers equipped with a total of 96 panel radiator units, with design and manufacturing focused on connection interface compatibility, C5 corrosion protection requirements for coastal environments, and coordination with on-site installation.
Project Configuration and Scope of Supply
| Project Name | ENEL Italy Grid Project |
|---|---|
| Project Location | Italy |
| Application scenarios | Transformer Radiator Supply for Grid Sectionalizing Substations |
| Associated Transformers | 6 BKSZ-40000/150 Transformers |
| Radiator Model and Quantity | PC1600(1200)-11(3)/520, 96 units in total |
| Corrosion-Protection Coating System | Galvanized and painted composite coating, RAL 7031, total dry film thickness of 320 μm, meeting the project's C5 corrosion protection requirements |
Environmental Conditions and Project Requirements
The project location has a hot and dry summer climate, with short-term ambient temperatures reaching up to 40°C. Some coastal sites are also exposed over the long term to humid air, salt spray, and chloride ion corrosion. For metal transformer panel radiators, weld seams, edges, corners, connection points, and locally vulnerable coating areas are key considerations in corrosion-protection design and manufacturing quality control.
In grid operating environments combining high temperatures and high salt-spray exposure, radiators must not only remain compatible with the transformer oil circuit, installation space, and connection dimensions, but also use an appropriate surface protection system to reduce the risk of moisture, salt spray, and chloride ions affecting the metal substrate. The project required sectionalizing substation interface matching, coordination for high-temperature operation, consideration of impact and harmonic operating conditions, and protection for C5 corrosivity environments.
Scope of Supply:This project focuses on oil-immersed transformer panel radiators and related interface adaptation, corrosion-protection coating, and manufacturing support services; it does not include the supply of complete transformers.
Customized Interface and Structural Support
Based on the transformer connection dimensions, equipment layout space, and on-site installation conditions, TengQi Technology customized the interface structure of the panel radiators. The interface design was coordinated with the transformer connection arrangement, enabling the radiators to meet assembly and application requirements for sectionalizing substation installations.
Panel radiators are an important part of the thermal management system of oil-immersed transformers. Interface matching affects on-site installation coordination and the overall fit between the radiator and the transformer oil circuit. Therefore, the project treated dimensional control, connection interfaces, and structural compatibility as key manufacturing support requirements to reduce deviations between manufacturing information and site installation conditions.
C5 Composite Corrosion-Protection Coating System
To address the risks of salt spray, high humidity, and chloride ion corrosion at coastal sites, this project adoptedGalvanized and Painted Composite Corrosion-Protection Coating. The topcoat color is RAL 7031, with a total dry film thickness of 320 μm, to meet the project's C5 corrosivity environment protection requirements.
- Basic Protection from the Galvanized Layer:provides basic protection for the metal substrate and can provide sacrificial protection under specific conditions.
- Paint Coating Barrier:An external protective barrier is formed through an organic paint film, reducing the risk of moisture, salt spray, and chloride ions penetrating the substrate.
- Composite System Synergy:The metallic coating and paint film together create a multilayer protection path, enhancing surface protection performance in highly corrosive environments.
- Film Thickness and Manufacturing Control:The 320 μm total dry film thickness, combined with manufacturing quality control for edges, weld seams, and connection areas, provides a targeted corrosion-protection basis for coastal grid applications.
Specific galvanizing processes, paint layer composition, local touch-up requirements, test methods, and acceptance criteria shall be subject to the project technical agreement, customer specifications, and final order documents.
Key Implementation Considerations
Coastal Salt Spray Environment Compatibility
A C5 environment generally corresponds to conditions involving high salt spray, high humidity, or severe chloride ion corrosion. Through a galvanized and painted composite system, combined with paint film thickness, edge coverage, and manufacturing quality control, the project addresses surface corrosion risks at coastal sites.
Coordination for High-Temperature Operating Conditions
For short-term ambient temperatures of 40°C, the radiator support solution coordinates the structure, interface configuration, and manufacturing quality with the transformer's overall thermal management design. Actual cooling performance must still be confirmed in conjunction with the oil circuit, installation arrangement, load, and on-site operating conditions.
Consideration of Impact and Harmonic Operating Conditions
To address the project's requirements for impact resistance and harmonic operation, the solution focuses on completing radiator interface and structural compatibility, supporting coordinated performance between the components and transformer system under relevant operating conditions.
Manufacturing and Quality Control
This project involves a total of 96 panel radiator units. During batch manufacturing, it is necessary not only to meet the dimensional and structural requirements of each individual product, but also to maintain consistency in interface dimensions, structural configuration, and surface treatment across different production batches, providing a stable basis for subsequent transformer assembly and on-site installation.
During manufacturing, TengQi Technology implements process control for key aspects of panel radiators, including dimensional accuracy, connection interfaces, welded structures, surface pretreatment, corrosion-protection coatings, and finished-product appearance, and carries out corresponding quality inspections in accordance with project technical documents and order requirements.
Dimensional and Interface Control
Key checks confirm radiator overall dimensions, interface locations, and connection relationships to ensure that the products match the transformer structure and project installation requirements.
Welding and Structural Quality
The manufacturing quality of radiator panel assemblies and connection points is controlled to ensure that structural fabrication remains consistent with project technical requirements.
Corrosion-Protection Coating Control
The manufacturing process for the C5 composite corrosion-protection system is coordinated around galvanizing, paint film coverage, total dry film thickness, and protection of edge areas.
Packaging and Transportation Protection
For overseas project transportation, necessary protection is provided for finished product surfaces, connection interfaces, and corrosion-protection coatings to reduce the risk of damage during handling and transport.
Project Support Summary
Based on the operating environment and transformer support requirements of the ENEL Italy grid project, TengQi Technology completed project support covering radiator structural adaptation, interface coordination, C5 composite corrosion-protection coating, and batch manufacturing. The project's key configuration and technical highlights include:
6
BKSZ-40000/150 Transformer Support
96 Units
PC1600(1200)-11(3)/520 Panel Radiators
C5
Protection Requirements for High-Corrosivity Coastal Environments
320 μm
Total Dry Film Thickness of the Galvanized and Painted Composite Coating
RAL 7031
Project-Specified Surface Coating Color
Customized interface
Adapted according to transformer structure and on-site installation conditions
TQT Transformer Radiator Project Support Capabilities
Jiangsu Tengqi Electric Power Technology Co., Ltd. specializes in the R&D, manufacturing, and project support of oil-immersed transformer panel radiators, providing corresponding customized radiator solutions based on different transformer models, cooling methods, installation spaces, and operating environments.
For grid, substation, power generation, renewable energy, and overseas EPC projects, TQT can provide project-specific adaptation based on transformer drawings, interface dimensions, cooling requirements, corrosion protection class, and environmental conditions, while supporting ONAN, ONAF, and different application requirements including C3, C4, and C5.
Radiator Customization
Panel radiator structure and dimensions are adapted according to transformer model, drawings, interface locations, and installation space.
Corrosion-Protection Solutions
C3, C4, and C5 corrosion-protection solutions are configured for different corrosive environments, including general industrial, coastal, high-humidity, and high salt-spray conditions.
Environment adaptation
Support is available for radiator projects operating in high-temperature, extreme-cold, coastal salt-spray, seismic, and other special environments.
Overseas Project Support
Coordinated support is provided for manufacturing, packaging, transportation, technical documentation, and related requirements for transformer OEMs, EPC contractors, grid projects, and renewable energy projects.
Discuss Your Transformer Radiator Project Requirements
If you are sourcing panel radiators for a grid, substation, transformer OEM, or overseas EPC project, you may provide TQT with the transformer model, radiator drawings, interface dimensions, cooling method, corrosion protection class, operating environment, and required quantity. We will provide corresponding radiator support based on your project requirements.
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