O.D. Ground Oil Tube
High-Precision Seamless Steel Tube for Hydraulic & Heavy Industrial Applications.
Product Overview
O.D. Ground Oil Tube is a precision seamless steel tube designed for hydraulic systems, heavy machinery, and high-pressure industrial applications.
It is manufactured through a controlled process including hot rolling or cold drawing, heat treatment, and external precision grinding, ensuring stable dimensional accuracy, high mechanical strength, and long-term sealing reliability under continuous operating pressure.
With more than 10+ years of experience in manufacturing and supplying precision steel tubes for industrial applications, our products are widely used in OEM hydraulic systems where dimensional stability and long-term performance consistency are critical procurement requirements.
Typical Applications
Hydraulic cylinder manufacturing (OEM production).
Construction and mining machinery systems.
Industrial automation equipment.
Oil & gas hydraulic transmission systems.
Heavy-duty engineering equipment.
High-pressure fluid control systems.
Technical Specifications
|
Parameter |
Specification |
|
Outer Diameter (O.D.) |
6 mm – 168 mm (customizable) |
|
Wall Thickness |
According to drawing or standard |
|
Length |
3 m / 6 m / custom |
|
Material Grades |
20#, 45#, 16Mn, ST52 or equivalent |
|
Manufacturing Process |
Hot rolled / Cold drawn + Heat treatment + Grinding |
|
Surface Finish |
External Ground / Precision Polished |
|
Dimensional Tolerance |
Up to ±0.05 mm |
|
Standards |
ASTM A106 / ASTM A53 / DIN 2391 / EN 10305 |
Key Engineering Advantages
Controlled Dimensional Accuracy for Hydraulic Systems
Precision grinding after cold drawing ensures tight tolerance control up to ±0.05 mm.
This improves hydraulic sealing performance and reduces leakage risk in high-pressure applications.
Stable Mechanical Performance Under Industrial Load
Heat treatment processes (normalizing / quenching / tempering depending on material grade) ensure stable tensile strength and structural reliability under continuous mechanical stress conditions.
Optimized Surface Condition for System Efficiency
The precision-ground surface reduces friction and improves sealing performance, extending the service life of hydraulic seals and moving components.
OEM Batch Consistency Control System
Each production batch is controlled under strict process parameters and inspection standards to ensure consistent mechanical and dimensional performance across mass production.
Quality Control System
Our manufacturing system follows internationally recognized quality management standards:
ISO 9001:2015 Quality Management System.
ASTM / DIN / EN standard production capability.
EN 10204 3.1 Material Test Certificate (MTC) system.
Inspection & Testing Procedures
Each batch is verified through standardized inspection procedures:
Ultrasonic Testing (UT) – internal defect detection.
Eddy Current Testing (ET) – surface quality inspection.
Hydrostatic Pressure Testing – pressure resistance validation.
100% dimensional inspection for critical tolerances.
Mechanical property testing (tensile strength / hardness / elongation).
Certification & Documentation
We can provide the following documents for each shipment:
EN 10204 3.1 Mill Test Certificate (MTC).
ISO 9001 certificate (certificate number available upon request for verification).
Third-party inspection reports (SGS / Bureau Veritas / TÜV Rheinland available before shipment).
Manufacturing Capability & Factory Profile
We operate a fully integrated production system covering:
Seamless steel tube production lines
Cold drawing workshops
Heat treatment furnaces
Precision grinding equipment
Metallurgical laboratory and inspection center
Production Scale
- Annual production capacity: 50,000+ tons
- Multiple production lines supporting continuous OEM supply
- Full batch traceability from raw material to finished product
- Stable long-term production capability for contract-based procurement
- Flexible production scheduling for bulk industrial orders
Export Experience & Market Coverage
Our products are supplied to industrial customers in:
Europe (Germany, Italy, Poland)
South America (Brazil, Chile)
Southeast Asia (Vietnam, Thailand, Indonesia)
Middle East (UAE, Saudi Arabia)
Typical Customer Types
- Hydraulic cylinder manufacturers
- Construction machinery OEM factories
- Industrial equipment integrators
- Engineering procurement contractors (EPC companies)
Verified Application Case Studies
Case 1: Hydraulic Cylinder OEM
Requirement:
High-precision steel tubes for hydraulic cylinder production with strict ±0.05 mm tolerance and stable batch consistency.
Supply Solution:
Provided precision ground tubes with full dimensional inspection and EN 10204 3.1 MTC documentation.
Result Observed by Customer:
•Improved assembly efficiency
•Reduced sealing failure rate in hydraulic systems
•Established long-term repeat procurement cooperation
Case 2: Mining Equipment Manufacturer
Requirement:
High-strength steel tubes for hydraulic systems operating under continuous heavy-load mining conditions.
Supply Solution:
Provided heat-treated alloy steel tubes designed for improved structural stability and pressure resistance.
Result Observed by Customer:
•Improved equipment reliability
•Reduced maintenance downtime
•Continued annual repeat procurement
Quality & Risk Control System
To ensure stable industrial procurement performance, we implement:
Internal defect rate: < 0.3% (monitored per production batch)
On-time delivery rate: ≥ 95% (based on production scheduling records)
Full batch traceability system (raw material → finished product)
100% pre-shipment inspection policy.
Engineering support for OEM integration requirements.
Why Global Industrial Buyers Choose Us
- Over 10+ years of manufacturing experience in steel tube industry
- Stable and controlled industrial production system
- High-precision machining suitable for hydraulic sealing applications
- Proven OEM supply capability with repeat industrial orders
- Compliance with ASTM / DIN / EN international standards
- Transparent inspection and documentation system
- Long-term stable supply chain capability for industrial procurement
FAQ
Q: Can you manufacture according to custom specifications?
A: Yes. We support customization based on technical drawings, including dimensions, material grades, tolerances, and surface requirements.
Q: What is your MOQ?
A: MOQ depends on specification and material grade. Trial orders are available for evaluation before mass production.
Q: Can third-party inspection be arranged?
A: Yes. SGS, Bureau Veritas, and TÜV Rheinland inspections can be arranged before shipment.
Q: Do you provide material certificates?
A: Yes. Each batch includes EN 10204 3.1 Mill Test Certificate (MTC) with full chemical and mechanical data.
Q: What is your delivery time?
A: Standard specifications: 7–12 days.
Custom specifications: Depends on technical requirements and order volume.
Q: Do you support long-term supply contracts?
A: Yes. We support long-term agreements with stable pricing, consistent quality, and continuous OEM supply capability.
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