Company Overview
YuShen Hydraulic is a manufacturer of cold-drawn seamless carbon steel tubes for high-pressure hydraulic and precision industrial applications.
We support long-term industrial supply chains across:
Europe (Germany, Italy, Poland)
Middle East (UAE, Saudi Arabia)
Southeast Asia (Vietnam, Thailand, Malaysia)
South America (Brazil, Chile)
Our production focuses on dimensional stability, batch-to-batch consistency, and long-term OEM supply reliability.
Engineering Application Positioning
Our seamless tubes are designed for:
Continuous hydraulic systems operating under repeated pressure cycles, where fatigue resistance, dimensional consistency, and internal cleanliness are critical for system reliability.
Typical systems include:
• High-cycle hydraulic presses.
• Industrial automation hydraulic circuits.
• Mining and heavy equipment hydraulic systems.
• Energy and fluid transmission systems.
Technical Specifications
|
Parameter |
Specification |
|
Outer Diameter |
4 mm – 120 mm |
|
Wall Thickness |
0.5 mm – 15 mm |
|
Steel Grades |
ST37.4 / ST52.4 / E235 / E355 / Grade A–C |
|
Standards |
EN / DIN / ASTM series |
|
Heat Treatment |
NBK (+N), BK (+C), GBK (+A), BKW (+LC), BKS (+SR) |
|
Surface Condition |
Oiled / Phosphated / Zinc-coated (Cr6-free) |
|
End Finish |
Plain / Beveled / Plastic capped |
|
Hydraulic Pressure Class |
Designed for high-pressure hydraulic systems up to 1000 bar class (application-dependent) |
OEM Project Experience (Engineering Reference Cases)
Our products are currently supplied to the following industrial application scenarios:
• Hydraulic pipeline systems for European construction machinery OEM production lines (continuous batch supply projects).
• High-pressure hydraulic systems for Middle East energy and industrial equipment manufacturers.
• Hydraulic assemblies for South American mining equipment production systems.
• Precision hydraulic control systems for Southeast Asian industrial automation equipment manufacturers.
Project characteristics:
• Continuous batch supply (multi-month to multi-year cycles).
• Stable dimensional and pressure performance requirements.
• High-frequency hydraulic operation environments.
Production Capability & Factory Capacity
• Cold-drawn seamless tube production lines (multiple continuous lines).
• Controlled heat treatment systems: NBK / BK / GBK / BKS.
• Batch-oriented OEM production management system.
Production capacity:
• Industrial-scale output (multi-thousand ton annual capacity range depending on specification mix).
• Stable long-term contract manufacturing capability.
• Continuous production scheduling for OEM demand stability.
Quality Control System (Full Inspection Coverage)
Each production batch undergoes:
100% Eddy Current Testing (ET)
Ultrasonic Testing (UT) for internal defects
Hydrostatic pressure testing (1.5× design pressure)
Tensile strength and hardness testing
Flattening & flaring mechanical performance tests
Dimensional SPC statistical process control (OD/WT consistency)
Internal borescope inspection for surface cleanliness
Standards compliance:
EN 10305-1
DIN 2391
ASTM A106 / A179 / A192 (application-based selection)
Engineering Performance Advantages
Stable Performance Under Cyclic Hydraulic Load
Designed for long-term hydraulic systems operating under repeated pressure cycles, reducing fatigue-related deformation risks.
High Dimensional Consistency for OEM Assembly
Cold-drawn manufacturing ensures:
• Stable OD/ID tolerances
• Reduced fitting variation in mass assembly
• Reliable sealing performance in hydraulic systems.
Internal Cleanliness for Hydraulic Safety
Controlled production and inspection reduce internal contamination risk, protecting:
• Hydraulic pumps
• Valves
• Precision control components.
Batch-to-Batch Consistency Control
SPC-based production control ensures consistent mechanical and dimensional performance across continuous OEM supply batches.
Export Packaging & Logistics Protection
Designed for long-distance international transport:
Internal and external anti-corrosion oil protection.
Plastic end caps for mechanical impact protection.
Hexagonal steel-banded bundling.
Waterproof woven wrapping.
Container blocking and bracing system for ocean freight stability.
Supply Capability & OEM Terms
We support industrial procurement requirements:
Flexible MOQ for sample and validation orders.
Custom cut lengths (5.8m / 6.0m / 11.8m or customized).
OEM marking (heat number, size, grade, customer coding).
Long-term contract supply for stable production planning.
Export documentation support including EN 10204 3.1 Mill Test Certificate.
Compliance & Documentation
- ISO 9001 Quality Management System
- EN 10305-1 production compliance system
- ASTM material standard compliance (application-based)
- EN 10204 3.1 Mill Test Certificate available
- Third-party inspection support (SGS / BV / TÜV upon request)
FAQ
Q: What industries are your seamless tubes used in?
A: They are widely used in hydraulic machinery, construction equipment, mining systems, energy infrastructure, and industrial automation applications.
Q: Are your tubes suitable for high-pressure hydraulic systems?
A: Yes. Depending on specification, tubes are suitable for high-pressure hydraulic applications and are verified through hydrostatic testing at 1.5×design pressure.
Q: Can you support long-term OEM supply contracts?
A: Yes. We support continuous batch production, long-term contract supply, and stable scheduling for OEM manufacturing systems.
Q: What quality inspection systems do you use?
A: We apply full batch inspection including UT, ET, hydrostatic testing, mechanical testing, dimensional SPC control, and internal surface inspection.
Q: Can you provide production traceability?
A: Yes. Each batch is fully traceable via heat number and can be supplied with Mill Test Certificates (EN 10204 3.1).
Hot Tags: high pressure carbon steel seamless tube, China high pressure carbon steel seamless tube manufacturers, suppliers, factory, a519 seamless tubing, api seamless steel tube, cold drawn pipe, galvanized seamless pipe, sa213 tp347h, seamless steel tube unbroken
