Our Hydraulic Tubes are manufactured from cold-drawn seamless steel (CDS) in compliance with EN 10305-1.
These tubes provide excellent strength, toughness, and dimensional precision, making them ideal for hydraulic and pneumatic systems operating under high pressure.
The material grade E355+N ensures consistent performance with normalized delivery condition for optimized machinability and pressure handling.
Key Features
·Cold-drawn seamless precision tubing
·Manufactured to EN 10305-1 standard
·Grade E355+N for strength & toughness
·High dimensional accuracy and straightness
·Smooth inner surface for reliable sealing
·Excellent performance in high-pressure hydraulic systems
Technical Specifications
|
Parameter |
Specification |
|
Standard |
EN 10305-1 (Seamless Precision Steel Tubes) |
|
Steel Grade |
E355+N (1.0580) |
|
OD Range |
Ø6 – 80 mm |
|
Wall Thickness |
1 – 10 mm |
|
Delivery Condition |
+N (Normalized) |
|
Tolerance |
H9 / H10 (upon request) |
|
Surface Finish |
Bright, Oiled, Phosphated (optional) |
|
Length |
Up to 12 m (custom cut-to-length available) |
Common Sizes
·Ø6 x 1 mm
·Ø12 x 2 mm
·Ø20 x 2.5 mm
·Ø30 x 3 mm (highlighted product)
·Ø50 x 5 mm
·Ø63.5 x 6 mm
·Ø80 x 8 mm
(Customized OD / WT available)
Manufacturing Process
1. Selection of high-quality seamless billets
2. Hot piercing and rolling into mother tube
3. Cold drawing to achieve precise OD/WT
4. Heat treatment – Normalized (+N) condition
5. Surface finishing – oiled / phosphated / pickled
6. Non-destructive testing (eddy current, UT, hydrostatic)
7. Final inspection & precision cutting
Applications
·Hydraulic systems (industrial & mobile machinery)
·Pneumatic systems
·Agricultural equipment
·Lifting and handling machinery
·Construction machinery
·High-pressure fluid conveyance
Suao is a professional manufacturer of high-precision cold drawn steel tubes, hydraulic tubes, and mechanical structure tubes, integrating R&D, production, inspection, and global sales. We operate two major production facilities covering over 36,000 square meters, with more than 200 employees and an annual output of 50,000+ tons, supplying customers across major industrial markets worldwide. As Suppliers of Hydraulic Tube – Cold Drawn Seamless Steel, EN 10305-1 E355+N, Precision Tubing for High-Pressure Systems, our integrated manufacturing capabilities include cold drawing, heat treatment, straightening, finishing, cutting, chamfering, and surface treatment. These are supported by a full range of advanced equipment for non-destructive testing, chemical analysis, and online dimensional monitoring—ensuring every tube meets stringent quality standards. We invest continuously in automation and smart manufacturing systems to enable flexible, high-mix, low-volume production. Custom Hydraulic Tube – Cold Drawn Seamless Steel, EN 10305-1 E355+N, Precision Tubing for High-Pressure Systems. Our products are widely used in construction machinery, hydraulic systems, automotive parts, wind energy, shipbuilding, railways, and oil & gas sectors. Certified to ISO 9001, ISO 14001, CE, and RoHS standards, Hongli is more than a manufacturer—we are a trusted long-term partner for global industrial clients.
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