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As industrial automation continues to advance, demand for hydraulic cold-drawn welded pipes remains on an upward trajectory. These pipes have become indispensable components in hyd...
Surface-Treated Steel Pipes – E-Coated, Phosphated, and Oiled
Category Overview
Our surface-treated steel pipes provide enhanced corrosion resistance and durability for demanding applications. Each treatment method offers unique advantages:
·E-Coated Steel Pipes:Superior anti-corrosion, black finish, full coverage including inner surfaces
·Phosphated Steel Pipes:Improves paint adhesion, corrosion protection, and lubrication
·Oiled Steel Pipes:Cost-effective protection against rust during storage and transport
These pipes are widely used in:
·Automotive components
·Construction and structural applications
·Industrial machinery
·Furniture and equipment frameworks
Key Features
·Multiple surface treatments: E-coating, phosphating, oiling
·Steel grades: S235, S275, ST52, or custom grades
·Suitable for welding, machining, bending, or coating
·Custom sizes and profiles available
·High-quality, uniform, and durable finishes
Technical Specifications Table
|
Treatment Type |
Steel Grades |
Coating / Finish |
OD Range |
Wall Thickness |
Typical Applications |
|
E-Coated |
S235, S275, ST52 |
Black electro-coating |
Custom |
1.5 – 12 mm |
Automotive, industrial, outdoor structures |
|
Phosphated |
S235, S275, ST52 |
Phosphate layer |
Custom |
1.5 – 12 mm |
Painting, lubrication, corrosion resistance |
|
Oiled |
S235, S275, ST52 |
Protective oil coating |
Custom |
1.5 – 12 mm |
Storage, transport, temporary corrosion protection |
Manufacturing Process
1. E-Coated Steel Pipes
·Cleaning and degreasing
·Electro-coating immersion for full surface coverage
·Curing in oven for durable adhesion
·Inspection: coating thickness, adhesion, surface uniformity
2. Phosphated Steel Pipes
·Surface cleaning and pickling
·Phosphate bath for protective layer
·Drying and optional oiling or painting
·Inspection: coating uniformity and adhesion
3. Oiled Steel Pipes
·Light cleaning
·Application of protective oil layer
·Inspection for uniform coverage
Applications
·Automotive frames, chassis, and structural components
·Construction and civil engineering pipelines
·Industrial machinery and equipment
·Outdoor and corrosion-prone structures
·Furniture and protective tubing
Advantages
·Enhanced corrosion resistancedepending on treatment type
·Uniform surface quality for better aesthetic and functional performance
·Compatible with welding, machining, or painting
·Long-term durability and protection during storage, transport, or service
·Supports custom sizes and steel gradesfor specific applications
Sub-Pages / Products (Example Links)
·E-Coated Steel Pipes– Anti-Corrosion Treated Tubes
·Phosphated Steel Pipes– Pre-Treated for Paint Adhesion
·Oiled Steel Pipes– Temporary Corrosion Protection
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