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    AI Overview
    Hydraulic tubes, Seamless tubes, Precision tubes - DIN 2391 ...
    Hydraulic oil steel pipelines, or tubing, are precision-engineered fluid conductors, typically made from cold-drawn or welded carbon steel (SAE J524/J525), designed to withstand high-pressure fluid power transmission. They are ideal for high-heat, high-pressure applications where rigidity, low noise, and minimal expansion are required, often spanning 1/8" to 2" O.D. and 6m in length. Common connections include DIN 2353 fittings, JIC 37-degree flares, and welding. 
    Key Technical Specifications & Characteristics 
    • Material: Usually low carbon steel (1010, 1020, ST37.4, 44.4, or 52.4).
    • Standards: DIN 2391, SAE J525 (welded), SAE J524 (seamless), ASTM A179, EN 10216-5.
    • Pressure Rating: Varies with diameter/wall thickness; often designed with a 4:1 safety factor. E.g., 3/8" tubing can handle 2036-8727 PSI depending on wall thickness.
    • Dimensions: External diameters commonly 6mm to 42mm (Metric) or 1/8" to 2" (Imperial). 
    Types of Hydraulic Steel Pipelines 
    • Seamless (SAE J524): Preferred for high-pressure systems requiring consistent strength,, higher pressure ratings, and smooth surfaces.
    • Welded (SAE J525/J356): Produced from cold-drawn, normalized steel, suitable for high-pressure lines requiring easy bending and flaring.
    • Stainless Steel: Used for superior corrosion resistance and high-temperature applications. 
    Advantages and Installation 
    • Advantages: Superior strength, high heat dissipation, long service life, and smaller minimum bend radius compared to hoses.
    • Installation: Can be bent to shape, reducing the number of fittings and potential leak points. Common methods include using tube benders and flare connections.
    • Repair: Cracked lines can be repaired using high-strength brazing, such as silver soldering, for high-pressure applications. 
    Common Applications 
    • Industrial machinery, construction equipment (excavators), and shipbuilding.
    • High-pressure hydraulic power systems.
    • High-temperature, high-vibration systems. 
    Proper Maintenance 
    • Ensure ends are capped to prevent contamination.
    • Avoid galvanized pipes, as they can corrode internally.
    • Regularly check for leaks at fittings (e.g., JIC or O-ring boss). 
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    Hydraulic Steel Tube


    USC Hydraulics
    https://uschydraulics.com › collections › hydraulic-steel-t...
    USC Hydraulics
    https://uschydraulics.com › collections › hydraulic-steel-t...
    Hydraulic Steel Tube. This precision steel pipe is cold-drawn according to DIN 2391 and made of tough 37.4, 44.4 or 52.4 grade steel.Read more
    2–11 day delivery
    Missing: Pipeline ‎| Show results with: Pipeline

    Pressure Tested Hydraulic Tubing


    Industrial Tube
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    Industrial Tube
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    Covers cold drawn and annealed seamless low carbon steel pressure tubing intended for use as hydraulic lines and in other applications.Read more
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    Hydraulic Steel Tubes


    RFS Hydraulics
    https://www.rfshydraulics.com › hydraulic-steel-tubes
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    Hydraulics steel tube is designed to convey liquid fluids to among hydraulics components, fittings, valves, flanges, and other tools.Read more

    HYDRAULIC PIPING STANDARD HANDBOOK


    GS-Hydro
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    Stainless Steel Tubing for Hydraulic Systems


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    Shop seamless 316 stainless steel tubing for hydraulic systems. Choose from OD/ID sizes like 0.25" × 0.04" × 0.18" or 0.75" × 0.07" × 0.62", with pressureRead more
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    Steel pipe for hydraulic lines


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    Buy steel tubing for hydraulic applications - USA made pipe


    Detroit Nipple Works
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    Detroit Nipple Works
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    What is Hydraulic Steel Pipe?


    Gnee steel group
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    Dec 11, 2023 — Hydraulic steel pipe is basically divided into the hydraulic system with fluid pipe and oil cylinder, also known as honing tube.Read more
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    People also ask
    Does hydraulic oil corrode steel?
    If the hydraulic oil is not replaced in time after long-term use, it will generate organic acids, gums, and other substances due to oxidation reactions. These acidic components will destroy the protective film on the metal surface, causing rust on steel parts and verdigris on copper parts.Sep 2, 2025

    Is Hydraulic Oil Corrosive？ - Evisco


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    What is a hydraulic steel tube?
    Hydraulic Steel Tubes - RFS Hydraulics
    Hydraulics steel tube is designed to convey liquid fluids to among hydraulics components, fittings, valves, flanges, and other tools. It is made of material E355 (ST 52.4) or E235 (ST 37.4). These two grades have different chemical composition.

    Hydraulic Steel Tubes


    RFS Hydraulics
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    RFS Hydraulics
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    What are the three types of steel pipe?
    Standard Pipe: There are three different types of standard metal pipes - welded (ERW Pipe), seamless pipe, and galvanized pipe. They represent 10% of all tubular products. Line Pipe: Used primarily in Oil and Gas Applications.

    Carbon Steel and Stainless Steel Pipes – Seamless and Welded Types


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    What are the 4 hydraulic systems?
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