Precision steel hydraulic tubes are the “vascular system” of engineering machinery. They play the core role of high-pressure fluid power conversion in the fields of machinery manufacturing, automobiles and other industries.
Precision hydraulic steel tube are mainly used in hydraulic systems and hydraulic pipelines. For example: engineering machinery multi-way valve oil circuits, injection molding machine booster cylinders and other high-precision hydraulic scenes.
The diameter tolerance of seamless hydraulic tubing can be controlled within the range of ±0.05mm, and they have high mechanical properties and durability. Therefore, they are also widely used in cutting-edge fields such as automated production lines, new energy vehicle steering systems and aerospace hydraulic actuators.
What Are Precision Seamless Steel Tubes?
Precision steel hydraulic tubes are high-quality steel tubes designed for hydraulic and pneumatic systems. Our hydraulic tubes are seamless precision carbon steel. The absence of welds enhances the strength and manufacturing precision of carbon steel hydraulic tubes. Because of this unique performance advantage, it has become the preferred material for high-pressure hydraulic systems.
Our hydraulic tubes adopts cold drawing or cold rolling process. To ensure the outer diameter tolerance (OD) is controlled within ±0.3mm, wall thickness deviation does not exceed ±7%.
Manufacturing process of hydraulic steel tubes
Material selection specification: Select high-quality seamless carbon steel to ensure the impact toughness value of the material.
Deformation processing control: For the Φ6-60mm specification tube process, a four-roller cold rolling finishing unit is used to implement three-pass diameter reduction processing.
Surface treatment: Hydraulic steel tubing can be galvanized and phosphated to prevent rust and wear.
Advantages of Precision Steel Hydraulic Tubes
As the core power transmission mode of modern industrial equipment, the performance of hydraulic and pneumatic systems is directly related to the operating efficiency of the entire system. In key areas such as engineering machinery, agricultural equipment and manufacturing production lines, system reliability determines production efficiency.
Seamless precision hydraulic tubes can ensure operation under high pressure environments due to their seamless structure. This seamless structure hydraulic tube eliminates the potential weaknesses of traditional welded pipes. Ensure the stability of fluid media during transmission.
The tensile strength of hydraulic tube can reach more than 600MPa, and they have excellent pressure resistance. The smooth inner wall of the pipe can effectively reduce fluid resistance and improve system energy efficiency.
Seamless Steel Tubes
Meet The Production Needs of Manufacturers. Increase Your Net Profit.
The Advantages of Using E235 and E355 Steel Grades
Our precision seamless steel tubes are crafted from high-grade carbon steel, specifically E235 and E355 steel grades:
- E235: With a maximum carbon content that allows for excellent forming and welding capabilities, E235 is commonly used in hydraulic systems where moderate strength is sufficient.
- E355: E355 steel tube achieves grain refinement through controlled rolling and controlled cooling technology during the heat treatment process, and its yield strength is generally increased by 60-80MPa compared with E235. This material can effectively resist high-frequency pulse pressure, especially in pipeline system applications with working pressures above 30MPa.
The entire product process implements EN 10305-1 (E1305) and DIN 2391 standards.
How Steel Hydraulic Tubing Enhance Performance?
- Enhanced Efficiency: Through the cold drawn process, the surface roughness of the tube inner wall is controlled within the range of Ra 0.2-0.4μm. The inner diameter deviation of the pipe is kept at ±0.01mm. This reduces fluid resistance.
- Increased Durability: Seamless structure, its stress distribution is more uniform. Under 10^6 cycles of load, the pipe can still maintain 85% of its initial strength. Therefore, the risk of failure can be minimized.
- Save costs: The yield strength of the material is increased by 15-20%, and the wall thickness of the pipe can be reduced by 8-12%. Therefore, reducing the wall thickness can save material cost.
Applications of Hydraulic Seamless Steel Tubes in Various Industries
Cold drawn seamless steel hydraulic tubes can be used in various industries:
Construction and agricultural machinery
Precision steel hydraulic tubes are used in excavators, bulldozers, cranes, agricultural machinery, shield machines and other heavy machinery. These precision carbon structural tube are mainly used for hydraulic cylinder pipes, hydraulic pipelines, hydraulic system pipes and other parts.
Industrial equipment
Press: pipes for main cylinders, yield strength ≥550MPa)
Injection molding machine: hydraulic circuit pipes, working temperature -20℃~150℃)
Automotive industry:
Precision hydraulic tube are cold-drawn and surface phosphating treated. It’s suitable for:
Brake pipeline: meets FMVSS 106 pressure test requirements
Fuel system: passes ISO 4038 penetration test standard
Welded Tubes VS Precision Steel Pipe
| Feature | Hydraulic Seamless Steel Pipes | Welded Tubes |
|---|---|---|
| Manufacturing Process | Extruded without welds | Formed and welded |
| Strength and Reliability | High | Moderate |
| Suitable for High Pressure | Yes | Limited |
| Precision | High | Variable |
While welded steel tubes might be sufficient for certain applications, seamless precision hydraulic steel tubes offer superior performance.
Technical Specifications of Hydraulic Steel Tubes
Our steel tube products meet rigorous standards:
Materials and Standards
- Carbon steel series: ST37.4, ST35, ST45
- Alloy steel series: ST52, E235, E355
- Comply with Standards: EN 10305-1,EN 10305-4, DIN 2391/C, GB/T 3639
Dimensions Tolerance Control：
- Outer Diameter: ∅4.0 – ∅100mm，h8/h9 tolerance.
- Wall Thickness: 0.5mm – 8mm. Control accuracy ±5%
- Ovality: ≤0.4%OD
Mechanical Properties
- Tensile Strength: Comply with EN 1305, DIN 2391 standards, minimum σb=370MPa, maximum σb=690MPa
- Elongation: δ5≥17% (L0=5d)
Surface Finish
- Galvanized: Zn layer thickness 8-15μm, in accordance with ISO 1461
- Phosphated: Phosphate film weight 1.5-3.0g/m², according to DIN 50942
- Passivated: Cr6+ content <0.01mg/m²
How to Choose the Right Precision Steel Tube for Hydraulic System
Matching high quality precision seamless tubes to your project requirements prevents leaks and other failures caused by pipes that are too small or too large. Factors to consider: size, material, and pressure rating.
1. Tubing size: Precisely match the system requirements. Determine the inner diameter and wall thickness of the pipeline according to the dynamic pressure range and flow characteristics of the system.
2. Material: High-strength alloy steel or specially treated carbon steel is recommended. Such materials can better resist corrosion and wear.
3. Pressure rating: The rated pressure of the pipeline must be higher than the maximum working pressure of the system. Consider the manufacturing process and weld strength of the pipeline. Make it able to withstand pressure fluctuations and impact loads during operation.
FAQs About Precision Seamless Steel Tubes
Q1: What makes your tubes suitable for high-pressure applications?
A1: Our tubes are made from high-grade carbon steel and undergo a cold drawn seamless steel process, resulting in high precision steel tubes that can withstand high pressures.
Q2: What is the delivery time?
A3: Delivery times vary based on order size and customization but rest assured, we strive for prompt fulfillment.
Q3: Do you offer certificates and documentation?
A4: Absolutely. We provide all necessary documentation, including compliance withEN 1305, DIN 2391 standards and material test reports.
Conclusion:
As you know, precision steel hydraulic tube is more than just a component. It is also a critical investment that drives business profitability for the pneumatic and hydraulic systems industries that rely on it.
Are you ready to customize your pneumatic or hydraulic system solution? Contact Global Hydraulic Steel Tube today to learn how our high-quality precision steel hydraulic tube can help your business run smoothly.
Seamless Steel Tubes
Meet The Production Needs of Manufacturers. Increase Your Net Profit.
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Global has years of professional knowledge and experience, and you can enjoy factory direct prices. We are dedicated to producing high-quality precision steel tubes that meet and exceed your expectations. Trust in our expertise for all your hydraulic steel tube needs.
