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High-Pressure Hydraulic Fittings and Oil Pipes from China Factory | Trusted Suppliers for Durable Solutions

Hydraulic oil pipe joints are essential components for connecting and sealing pipelines in hydraulic systems. Widely utilized in high-pressure applications across various sectors including construction machinery, machine tools, agricultural machinery, ships, and hydraulic stations, these joints play a crucial role in maintaining system efficiency and safety, Manufactured in China, our hydraulic oil pipe joints are crafted from high-quality 45 grade steel or 42CrMo alloy steel, ensuring exceptional strength and durability. Each joint undergoes rigorous quenching and tempering treatments, allowing them to withstand extreme pressure, pulse impacts, and prolonged vibrations without the risk of cracking or deformation. To enhance longevity, the surfaces of these joints are treated with galvanizing, cadmium plating, or blackening, providing excellent rust and corrosion resistance, making them ideal for challenging environments like outdoor settings, oil exposure, and high humidity, As a leading supplier and factory of hydraulic components in China, we deliver top-notch products designed to meet the rigorous demands of your hydraulic systems. Trust our hydraulic oil pipe joints to ensure reliable performance in your operations
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    Product Details

    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. According to the connection method and structure, the common types are as follows:

    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

    Thread standard: It is necessary to match the interface thread, commonly including metric (M), imperial (G, cylindrical pipe thread), American (UNFPA/UN), and tapered pipe thread (PT/NPT). Choosing the wrong option may result in oil leakage or damage to the interface.
    Pressure level: Select according to the system working pressure (low pressure, medium pressure ≤ 16MPa, high pressure ≤ 35MPa, ultra-high pressure higher).
    Diameter (inner diameter): It needs to match the inner diameter of the pipeline to ensure flow and avoid pressure loss.
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    Frequently Asked Questions

    What are the main types of hydraulic oil pipe joints?

    The main types include expansion joints, card sleeve joints, welded joints, hose connectors, and quick-disconnect connectors.

    Why is choosing the correct thread standard crucial for hydraulic fittings?

    Matching the correct thread standard (such as Metric, G, NPT, or JIC) is essential to ensure a tight seal. Choosing the wrong thread standard can cause high-pressure oil leaks or permanently damage the thread interfaces.

    What are the key selection parameters for hydraulic pipe joints?

    The key parameters are the thread standard, the pressure rating level (low, medium, high, or ultra-high pressure), and the internal diameter size to match the pipeline flow rate.

    Where are hydraulic joints typically used?

    They are widely used in heavy construction machinery and industrial equipment, such as excavators, loaders, forklifts, injection molding machines, and hydraulic presses.

    What are the main advantages of using high-quality hydraulic pipe joints?

    High-quality joints offer excellent pressure resistance, anti-vibration performance, leak-proof sealing, quick installation/disassembly, and high durability under harsh working conditions.

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