High-Pressure Hydraulic Fittings and Oil Pipes from Reliable China Suppliers and Factory
Product Description
Hydraulic oil pipe joints are key components in hydraulic systems that connect pipelines, hoses, hydraulic pumps, valves, and other components. Their main function is to ensure sealing, withstand high pressure, and achieve reliable connections.
Structurally, it is mainly divided into various forms such as straight through, elbow, tee, variable diameter, hinge, flange, etc. The thread specifications cover metric M, imperial G, American NPT, JIC and other standards. It is matched with O-ring, combination gasket or metal hard seal to achieve high-pressure sealing without oil leakage, firm installation and strong sealing performance.
The advantage lies in excellent pressure resistance, adaptability to high-pressure oil system, reliable connection, earthquake resistance and anti loosening; Complete specifications, strong universality, can quickly connect hydraulic oil pipes of different diameters and threads; Easy disassembly and assembly, convenient for equipment maintenance and pipeline layout.
Mainly used in hydraulic equipment such as excavators, loaders, forklifts, injection molding machines, and presses, responsible for conveying hydraulic oil, ensuring smooth oil flow and stable pressure, it is an indispensable basic component in hydraulic systems.
Common Types
Expansion Joint
Sealing is achieved by expanding the end of the pipe into a trumpet shape, suitable for medium and low pressure (copper or thin-walled steel pipes).
Card Sleeve Joint
Using a card sleeve to cut into the pipe wall to form a seal, it is resistant to high pressure and earthquake, and is widely used in construction machinery (steel pipes).
Welded Joint
The pipe is welded to the joint body, with high strength and reliable sealing, suitable for high temperature, high pressure or high vibration environments.
Hose Connector
Used to connect hydraulic hoses, commonly of the crimping or reusable type, integrated with the hose.
Quick Connector
Can be manually and quickly disassembled, used in situations where frequent connection/disconnection is required (such as portable hydraulic tools).
Key Parameters and Selection
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Thread Standard
Must match the interface thread, including metric (M), imperial (G), American (UNFPA/UN), and tapered pipe thread (PT/NPT).
⚡
Pressure Level
Select according to system working pressure: low pressure, medium pressure (≤16MPa), high pressure (≤35MPa), or ultra-high pressure.
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Diameter
It needs to match the inner diameter of the pipeline to ensure proper flow and avoid pressure loss.
Frequently Asked Questions
What are the main functions of hydraulic oil pipe joints?
Their main function is to connect components like pipelines, hoses, pumps, and valves, ensuring secure sealing, withstanding high pressure, and achieving reliable connections without oil leakage.
What thread standards are available for these joints?
The thread specifications cover a wide range of standards including metric M, imperial G (cylindrical pipe thread), American NPT/UNFPA/UN, JIC, and tapered pipe threads (PT).
What are the advantages of using these hydraulic oil pipe joints?
Key advantages include excellent pressure resistance, adaptability to high-pressure oil systems, earthquake resistance, anti-loosening design, complete specifications, quick connectivity, and easy disassembly for maintenance.
What is the difference between card sleeve joints and welded joints?
Card sleeve joints seal by cutting into the pipe wall and are commonly used in construction machinery. Welded joints weld the pipe directly to the joint body, offering high strength for high temperature, high pressure, or high vibration environments.
How do I choose the correct parameter specifications?
Selection should match the exact thread standard to avoid leaks, the appropriate pressure level of the system (low, medium ≤16MPa, high ≤35MPa, or ultra-high), and the inner diameter of the pipeline to prevent pressure loss.
Where are these hydraulic fittings typically applied?
They are mainly used in heavy hydraulic machinery and equipment such as excavators, loaders, forklifts, injection molding machines, and presses to ensure smooth oil flow and stable pressure.