Transformer tanks are typically made of low-carbon steel plate or Q235 hot-rolled steel plate. Some special designs may use alloy materials such as stainless steel. These metal materials possess good mechanical strength and sealing properties, effectively protecting the internal iron core and windings, and withstanding long-term immersion in transformer oil and temperature changes.
Depending on the application and structural requirements, different types of tanks use slightly different materials:
Small and medium-sized transformers often use box-type tanks, with the tank shell welded from low-carbon steel plate, facilitating easy access for maintenance.
Large transformers often employ a bell-shaped structure, also constructed from high-strength steel plate, ensuring overall stability and pressure resistance.
Fully sealed transformers widely use corrugated tanks, mostly made of cold-rolled steel plate, with elastic compensation capabilities to cope with the thermal expansion and contraction of the oil.
For special environmental applications, such as highly corrosive environments, stainless steel tanks are selected to enhance corrosion resistance.
In addition, to improve safety and extend service life, the inner wall of the tank is often treated with anti-corrosion measures, such as coating with special transformer paint, and a magnetic shielding structure is installed to reduce stray losses. The grounding terminal is also located at the bottom to ensure operational safety.
