distribution transformer oil tank
⚡100% Zero-Leakage Integrity
Fully automated robotic welding paired with leak testing ensures absolute oil tightness.
C3–C5 Extreme Anti-Corrosion
Multi-stage automated shot blasting and electrostatic powder coating built to withstand harsh outdoor & coastal environments.
🛠️Precision OEM / ODM Customization
Tailor-made designs for 50kVA–2500kVA (<35kV) distribution transformers, backed by advanced thermal analysis & engineering support.
📜 Global Compliance & ISO Quality
Certified under ISO 9001 and engineered to meet ISO 9001:2015 and GB/T 19001-2016.
Nantong Zhihe Electric Co., Ltd. is a leading manufacturer of transformer tanks.Zhihe focuses on the product itself and has built a professional, stable, and experienced technical R&D team to ensure quick and efficient solutions for customers.
Corrugated transformer oil tanks are commonly used in oil-immersed transformers below 35kV. They consist of corrugated plate walls, edges, a cover, and a bottom, serving to help cool and protect the transformer core. Corrugated oil tank adopt corrugated fins heat dissipation method with reflux flow smooth ,no dead corners for oil collection,less prone to oil stains,and beautiful appearance.

Zhihe's Advantages

The structure of the transformer oil tank is complex, with many welds and dead corners.The cleanliness of the tank interior requires extremely strict standards,otherwise it will have a significant impact on the electrical performance of the transformer.Zhihe possesses advanced equipment such as fully automated shot blasting, rinsing, painting, powder coating, and pouring paint to ensure this. Furthermore, the corrugated tanks undergo multiple quality inspections from production to delivery.
⚙️ In-House Corrugated Fin Forming Technology
Equipped with high-precision automated fin forming machinery, ensuring uniform wave pitch, optimized oil flow channels, superior heat dissipation, and reduced production lead time.
High-Impact Product Intro & Deep Dive
Our Transformer Oil Tanks are specifically designed for oil-immersed distribution transformers rated below 35kV (50kVA to 2500kVA). Engineered as both a dynamic heat dissipating element and a protective housing for transformer core assemblies, our tanks replace traditional heavy radiators with optimized corrugated fins.
Key Specifications & Parameters
| Parameter | Technical Standard / Range |
| Applicable Voltage | Up to 35 kV Class |
| Capacity Range | 50 kVA – 2500 kVA |
| Material Grade | Q235 |
| Fin Plate Thickness | 1.0mm – 1.5mm (Customizable) |
| Welding Technology | Automated Collaborative Robotic Gas-Shielded Arc Welding |
| Surface Treatment | Fully Automated Shot Blasting + Powder Coating / Spray Painting |
| Leakage Testing | 20-25 KPa for 30min(315KVA and below)15-20 KPa(400KVA annd above) |

Quality management system GB/T 19001-2016 ISO 9001: 2015
The entire production process of Zhihe is subject to strict control and management. All corrugated fuel tanks undergo multiple quality inspection processes, from materials, production, installation, testing, packaging to delivery, all of which are carried out under strict and logically related procedures.
Zhihe operates fully automated production lines for corrugated panels.
Collaborative Robot Welding.

Multiple Inspections from Production to delivery.



Zhihe offers short delivery cycles. Contact us to discuss your requirements.We accept ODM/OEM.
Core Technical Advantages & Solutions
Superior Thermal Dissipation: Designed with smooth oil reflux channels and no dead corners, facilitating smooth natural oil convection and rapid heat transfer.
Hermetic Zero-Leakage Integrity: Precision right-angle edge forming combined with robotic welding eliminates micro-gaps and internal stresses, ensuring 100% leak-proof performance under expansion/contraction.
Exemplary Interior Cleanliness: Manufactured using fully automated shot blasting, and controlled drying procedures. Extremely low particulate residue prevents oil degradation and maintains insulation breakdown voltage.
Advanced C3-C5 Anti-Corrosion Protection: Multi-stage automated shot blasting followed by electrostatic powder coating or pouring paint ensures withstand against harsh industrial and tropical outdoor environments.
Frequently Asked Questions (FAQS)
Q1: What is the typical lead time for standard vs. custom corrugated tanks?
A: Standard models are dispatched within 8 days. Equiped with radiators models take 11 days depending on techinical specifications and quantity.
Q2: What leakage test methods do you perform prior to shipment?
A: Every corrugated tank undergoes 100% air-pressure leakage testing. 20-25 KPa for 30min(315KVA and below)15-20 KPa(400KVA annd above)
Q3: Can you match custom RAL color requirements and specialized paint thicknesses for coastal environments?
A: Yes, we provide full color customization (RAL standard) with paint/powder coating thicknesses adapted to C3, C4, or C5 high-corrosion outdoor environments.
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