Precision Carbon Steel Seamless Tube
Hydraulic & Mechanical Engineering Grade | OEM Industrial Supply Manufacturer.
Product Overview
Precision Carbon Steel Seamless Tubes are high-strength, high-precision steel tubes manufactured without welding seams, designed for hydraulic systems, mechanical engineering, and high-pressure industrial applications.
At Yushen Hydraulic, we are a manufacturing-based OEM supplier, focusing on stable production capability, engineering-grade consistency, and long-term industrial supply reliability.
Our tubes are widely used in:
•Hydraulic cylinder systems.
•Construction machinery.
•Automotive hydraulic components.
•Industrial fluid transmission systems.
We serve global OEM buyers requiring stable quality, repeatable precision, and verifiable manufacturing capability.
Why Global OEM Buyers Choose Us
Engineering-Oriented Manufacturing System
Dedicated production flow for hydraulic-grade seamless tubes.
Stable batch-to-batch dimensional control system.
Controlled production scheduling for repeat OEM orders.
Suitable for hydraulic cylinder manufacturing lines.
Hydraulic Precision Capability
Controlled OD/ID tolerance for hydraulic applications.
Stable concentricity and straightness for machining use.
Controlled ovality for CNC processing reliability.
High repeatability in batch manufacturing.
Export & Industrial Application Coverage
Europe, Middle East, South America, Southeast Asia.
Hydraulic equipment manufacturers.
Machinery OEM supply chains.
Industrial distributors.
Manufacturing System
Our production system is designed for industrial-scale precision manufacturing, not trading-based sourcing.
Full Production Flow
Carbon steel billet selection and incoming inspection
•Hot piercing seamless tube forming
•Multi-pass cold drawing for dimensional precision
•Heat treatment (annealing / normalizing / stress relief)
•Straightening for linear accuracy control
•Surface finishing (oiled / phosphated / anti-corrosion)
Quality Inspection System (Verification Layer)
We operate a multi-level inspection system:
•Ultrasonic testing (UT) – Internal defect detection
•Eddy current testing (ET) – Surface defect screening
•Hydrostatic pressure testing – Pressure resistance verification
•Chemical composition analysis – Material verification
•Dimensional inspection – OD / ID / straightness control
Production Capacity & Operational Performance Signals
Our production system supports OEM industrial supply requirements:
•Continuous production capability for bulk OEM orders
•Stable batch manufacturing for repeat customers
•Controlled scheduling for long-term contracts
•Flexible delivery planning for urgent orders
Internal Manufacturing Control Focus:
•Dimensional tolerance control under EN/DIN standards
•Stable batch repeatability for OEM production lines
•Controlled internal defect management under inspection system
•Consistent machining performance for hydraulic applications
Technical Specifications
Size Range
•OD: 4 mm – 120 mm
•Wall Thickness: 0.5 mm – 20 mm
•Length: Up to 12 meters or customized
Standards
•EN 10305-1 / EN 10305-2
•DIN 2391
•ASTM A519
Precision Performance
•Tight dimensional tolerance control
•Stable wall thickness uniformity
•High straightness for hydraulic cylinder applications
•Excellent machining consistency
Steel Grades & Standards Compliance
SAE 1020 / 1026
ST35 / ST37 / ST52
E235 / E355
C20 / C45 (customized)
Compliant with:
EN 10305 hydraulic precision standard
DIN 2391 mechanical precision standard
ASTM A519 structural tubing standard
Industrial Applications
Hydraulic Systems
Hydraulic cylinders
Hydraulic power units
High-pressure fluid systems
Construction Machinery
Excavators
Loaders
Heavy hydraulic equipment
Automotive Engineering
Shock absorbers
Steering systems
Fuel system components
Industrial Equipment
Pneumatic systems
Mechanical structures
Precision machining components
Quality Control System
We implement strict multi-stage inspection:
Chemical composition verification
Mechanical property testing (tensile / yield / elongation)
Ultrasonic internal inspection (UT)
Eddy current surface inspection (ET)
Hydrostatic pressure testing
Dimensional inspection (OD / ID / straightness)
Surface quality inspection
Packaging & Export Protection System
Steel strip bundling for structural stability.
Plastic end caps for internal protection.
Anti-rust oil coating.
Waterproof wrapping for sea freight.
Wooden box / steel frame packaging for heavy transport.
OEM & Custom Engineering Service
Custom OD / ID / wall thickness.
Tight tolerance requirements.
Special steel grades.
Surface treatment customization.
OEM labeling & packaging.
Long-term industrial supply agreements.
FAQ
Q: Why seamless tubes instead of welded tubes?
A: Seamless tubes provide higher strength and pressure resistance due to absence of welding seams.
Q: Can you ensure OEM consistency?
A: Yes. Our production system is designed for batch-to-batch consistency.
Q: Can you produce based on drawings?
A: Yes, full OEM customization is supported.
Q: Delivery time?
A: Typically 15–30 days depending on specifications.
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