110-220KV Power Transformer Oil Tank
110-220KV Power Transformer Oil Tank suppliers
110-220KV Power Transformer Oil Tank factory

110-220KV Power Transformer Oil Tank

Name: China Cheap 110-220KV Power Transformer Oil Tank Manufacturers Suppliers Factory - Nantong Zhihe
Brand: Zhihe Electric
SKU: 300016861

110–220 kV Power Transformer Oil Tank ·Drawing-Based Manufacturing: Tank dimensions, steel thickness, openings and accessories are manufactured according to approved customer drawings.
·Reliable Structural Strength: Reinforced tank walls, lifting structures and mounting bases are designed for large power transformers.
·Precise Interface Control: Flanges, bushing openings, valve connections and radiator mounting points are inspected against the drawings.
·100% Leak Testing: Every transformer oil tank is leak-tested before surface coating to verify the sealing of welded seams and connections.

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Product Introduction

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Nantong ZHIHE Electric manufactures customized power transformer tanks for transformer manufacturers and power equipment companies. Robotic welding is combined with experienced manual welding to handle long seams, reinforced structures and complex sealing areas. From drawing review and material preparation to welding, leak testing and surface coating, each production stage is controlled to ensure accurate assembly and reliable operation.

Complete tank assemblies can be supplied with detachable radiator connections, conservator supports, valve interfaces, lifting lugs, mounting bases and other customized accessories.

TECHNICAL PARAMETERS
Product Name	110-220KV Oil-immersed Transformer Oil Tank
Primary Function	Structural component & assembly integration
Material Type	High-grade metal alloys (carbon steel, stainless steel)
Thickness Range	Standard industrial thickness gauges available
Dimensional Tolerance	Precision manufacturing standards
Surface Finish	Multiple professional-grade options (powder coating, etc.)
Corrosion Resistance	Enhanced protective coating available
Temperature Rating	Suitable for wide industrial operating temperature range
Load Capacity	High structural strength rating
Manufacturing Process	Advanced cutting, bending and forming processes
Custom Service	OEM & ODM customization acceptable
Certification	GB/T 19001-2016/ISO 9001-2015
Production Lead Time	Strart from 15 days based on drawings and quantities

Drawing Review and Dimensional Control

Before production begins, our technical team reviews the customer's drawings and confirms the main manufacturing requirements, including:

Overall tank dimensions
Steel plate thickness
Tank wall, bottom and cover structures
Radiator flange positions
Bushing and valve openings
Lifting lugs and jacking pads
Conservator and accessory supports
Stiffener arrangement
Transportation and installation requirements

Critical dimensions are checked throughout the manufacturing process. Particular attention is given to flange alignment, opening positions, mounting points and assembly interfaces to help reduce fitting problems at the transformer manufacturer's workshop.

Welding and Structural Manufacturing

Large power transformer tanks contain long welded seams, reinforced corners, heavy mounting structures and multiple accessory interfaces. ZHIHE combines robotic welding with experienced manual welding according to the structure and accessibility of each joint.

Robotic welding helps maintain stable weld formation and production consistency. Skilled welders complete corners, stiffeners, flanges and other complex areas requiring manual operation.

After welding, the tank is inspected for:

Weld continuity and appearance
Surface defects
Structural deformation
Critical dimensions
Flange alignment
Opening positions
Lifting and supporting structures

Welded surfaces are then ground and prepared according to the specified coating and appearance requirements.

Surface Treatment for Outdoor Operation

Power transformers may operate outdoors under high humidity, industrial pollution, coastal salt spray or strong ultraviolet exposure. ZHIHE provides C3–C5 corrosion-protection systems according to the project environment and customer specifications.

Available options include:

C3 coating: Standard industrial and urban environments

C4 coating: Highly humid or polluted industrial environments

C5 coating: Coastal, offshore and highly corrosive environments

Zinc-rich primer: Available according to the coating specification

Customized topcoat: Color, gloss and dry-film thickness can be specified

Surface treatment can include cleaning, sandblasting, primer application, intermediate coating and topcoat application. Coating thickness and surface appearance are inspected before delivery.

Leak Testing and Quality Control

Oil tightness is one of the most important requirements for a power transformer tank. Every ZHIHE oil tank undergoes leak testing before painting or powder coating.

During testing, the tank is pressurized according to the approved inspection procedure. Welded seams, flanges and connection areas are checked using a leak-detection solution. Any air bubbles indicate a possible leakage point, which must be repaired and retested.

The quality-control process includes: