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Our Hydraulic Cylinder Tubes (CDW) are produced according to EN 10305-2 E355, using high-quality welded steel pipes that are further cold drawn to improve accuracy, surface finish, and mechanical properties.
Our Hydraulic Cylinder Tubes (CDW) are produced according to EN 10305-2 E355, using high-quality welded steel pipes that are further cold drawn to improve accuracy, surface finish, and mechanical properties.
These tubes are widely used for:
·Hydraulic cylinders in industrial and mobile equipment
·Construction and agricultural machinery
·Automotive hydraulic systems
·Any application requiring precision honing or SRB finishing
Compared with seamless tubes, CDW tubes offer:
·Lower cost for medium-pressure applications
·Excellent dimensional accuracy after cold drawing
·Consistent inner and outer surface quality
Key Features
·Standard: EN 10305-2
·Steel Grade: E355
·Welded + Cold Drawn for improved precision
·Excellent straightness for cylinder applications
·Designed for honing or SRB finishing
·Cost-effective alternative to seamless tubes
Technical Specifications Table
|
Parameter |
Specification |
|
Standard |
EN 10305-2 |
|
Steel Grade |
E355 |
|
Outer Diameter (OD) |
Ø30 – Ø300 mm (custom sizes on request) |
|
Wall Thickness (WT) |
2 – 12 mm |
|
Surface Condition |
Cold Drawn Welded (CDW) |
|
Tolerance |
High-precision, suitable for honing/SRB |
|
Length |
Up to 12 m, cut-to-length available |
Manufacturing Process
1. Welded steel tube production from high-quality strip steel
2. Cold drawing to refine dimensions, mechanical properties, and surface finish
3. Straightening for excellent linear accuracy
4. Non-destructive testing (NDT) to ensure weld integrity
5. Optional honing or SRB processing for super-smooth inner surface
Applications
·Hydraulic cylinders for construction, mining, and agriculture
·Industrial hydraulic machinery
·Automotive suspension and hydraulic systems
·Medium-pressure hydraulic and pneumatic cylinders
Advantages
·Cost-effective vs. seamless tubes
·Precise OD and WT tolerances after cold drawing
·Excellent weld integrity and mechanical strength
·Smooth inner bore after honing or SRB
·High straightness, essential for hydraulic performance
Comparison: Seamless vs. Welded Hydraulic Cylinder Tubes
|
Feature / Property |
Seamless Tube (EN 10305-1) |
Welded Tube (EN 10305-2) |
|
Manufacturing Method |
Pierced from solid billet, no weld seam |
Made from strip steel, longitudinally welded then cold drawn |
|
Steel Grades |
E235, E355, ST52, 1020, 1045, 4130, 4140 |
E235, E355 (common) |
|
Dimensional Accuracy |
High, improved by cold drawing |
High, improved by cold drawing |
|
Surface Quality |
Excellent, suitable for honing/SRB |
Very good, suitable for honing/SRB |
|
Strength & Pressure Rating |
Higher strength, suitable for high pressure |
Adequate for medium pressure applications |
|
Cost |
Higher due to production process |
More cost-effective |
|
Typical Applications |
Heavy-duty hydraulic cylinders, mining, high-pressure systems |
Standard hydraulic cylinders, agricultural and industrial machinery |
|
Max. Straightness |
Excellent (after cold drawing) |
Excellent (after cold drawing & weld inspection) |
Key Takeaway
·Choose Seamless (EN 10305-1) when higher pressure, strength, and safety factors are required.
·Choose Welded (EN 10305-2) when cost-efficiency and medium-pressure applications are sufficient.
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 Cylinder Tube – Cold Drawn Welded Steel EN 10305-2, E355, For Honing & SRB, 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 Cylinder Tube – Cold Drawn Welded Steel EN 10305-2, E355, For Honing & SRB. 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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