Requirements for Stainless Steel Pipes Used in Mechanical Equipment
The reliability of modern mechanical equipment depends heavily on the quality of its piping components. In hydraulic systems, injection machinery, metal-forming equipment, and various industrial machines, the demand for high-precision stainless steel pipes continues to grow. To meet these strict mechanical performance requirements, Ganyeah Group supplies precision seamless steel pipes manufactured according to DIN 2391 and GB 3639-83, offering dimensional accuracy, high pressure resistance, and excellent surface quality.
High-precision DIN 2391 stainless steel hydraulic tubes for mechanical equipment
1. Precision Seamless Steel Pipe Technology for Mechanical Applications
Ganyeah Group’s mechanical-grade precision seamless pipes are produced using advanced cold-drawing and cold-rolling processes. Each tube undergoes strict dimensional, pressure, and surface-quality inspections to ensure compliance with European (DIN), Japanese, and American technical standards.
The resulting pipes offer:
- Oxide-free inner and outer surfaces
- High pressure resistance without leakage
- Exceptional dimensional accuracy (tight OD/ID tolerances)
- Superior surface smoothness
- Cold bending without deformation
- No cracking during flaring or flattening
- Surface anti-corrosion treatment to extend service life
These characteristics make Ganyeah’s precision stainless steel pipes suitable for complex, high-load mechanical environments requiring long-term stability.
2. DIN Black Phosphated High-Precision Hydraulic Pipes
To meet the demands of hydraulic and pneumatic systems, Ganyeah Group produces DIN black phosphated precision hydraulic tubes, using imported environmentally friendly phosphating solutions.
Process Overview
- Using finished DIN precision bright-annealed seamless tubes as base material.
- Applying internal and external phosphating to form a uniform black protective film.
- The micropores of the phosphated film absorb anti-rust oil for long-lasting corrosion protection.
- Both tube ends are sealed with caps to prevent contamination.
Key Features
- Uniform, smooth black appearance
- Enhanced corrosion and rust resistance
- Clean, contamination-free inner surface for hydraulic performance
- Excellent compatibility with high-pressure mechanical equipment
These properties make phosphated stainless steel tubes ideal for hydraulic cylinders, injection units, presses, and tooling machinery.
3. Material Grades and Dimensional Tolerances
Ganyeah Group offers a full range of mechanical-grade materials:
- 10# (ST35)
- 20# (ST45)
- 35# (ST55)
- 45# (ST45)
- 16Mn (ST52)
DIN 2391-81 Dimensional Tolerances
- OD tolerance: ±0.08–0.10 mm
- ID tolerance: ±0.10–0.15 mm
- Wall thickness tolerance: ±0.10–0.15 mm
Available Sizes
- Outer diameter: 4–63 mm
- Wall thickness: 0.5–6.0 mm
- Standard length: 6 meters
(Non-standard or custom specifications available upon request through Ganyeah engineers.)
4. Application Fields of Precision Stainless Steel Pipes
Mechanical equipment requires stable, durable, and accurate piping solutions. Ganyeah Group’s DIN 2391 stainless steel pipes are widely used in:
- Hydraulic systems
- Plastic and injection molding machinery
- Rubber and die-casting equipment
- Forging and engineering machinery
- Automotive and shipbuilding industries
- Metalworking and machining centers
- Defense, diesel engines, air compressors
- Agricultural and forestry machinery
- Automation systems
- Petrochemical and aerospace equipment
- HVAC and air-conditioning units
- Shoe-making machinery
- High-precision tooling and hardware manufacturing
Wherever high precision, high pressure resistance, and long-term reliability are required, Ganyeah precision stainless steel pipes deliver consistent performance.