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hydraulic tubes, seamless pipe,

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Hydraulic Tubes Fittings Dimension Standards

Date:2024-08-05View:118Tags:hydraulic tubes, seamless pipe,

Definition and classification of hydraulic tubes fittings


Hydraulic tube fittings are components for connecting hydraulic pipelines, usually composed of fitting body, internal and external threads, sealing rings (O-rings or flat washers), etc. According to different interface connection methods, hydraulic pipe fittings can be divided into threaded hydraulic pipe fittings, flanged hydraulic pipe fittings, plug-in hydraulic pipe fittings, etc.


Dimension standards for hydraulic tubes fittings


1. Domestic threaded hydraulic tubes fittings standards


Common domestic hydraulic pipe fittings standards include JB/T 7306, JB/T 7987, GB/T 9065, etc. Among them, GB/T 9065 is a mechanical industry standard, suitable for high-pressure hydraulic hose fittings and pipe fittings with an inner diameter of 6~50mm. The sizes of these domestic standard fittings are mostly metric, and common specifications include M10×1, M12×1.5, M18×1.5, etc.


2. Foreign threaded hydraulic tube fitting standards


Common foreign hydraulic pipe fitting standards include SAE J514, JIS B2351, ISO 8434-1, DIN 2353, etc. Among them, SAE J514 is an American standard and is applicable to hydraulic pipe fittings. ISO 8434-1 is a European standard and is applicable to hydraulic connectors with pressures below 630 bar. The sizes of these foreign standards are mostly in inches, and common specifications include 1/4-18, 3/8-18, 1/2-14, etc.


3. Flange hydraulic pipe fitting standards


Common domestic flange hydraulic pipe fitting standards include JB/T 7859, GB/T 9117, GB/T 9118, etc. Among them, JB/T 7859 is applicable to fasteners at the flange connection of high-pressure hydraulic fittings, and GB/T 9117 and GB/T 9118 are applicable to fasteners at the flange connection of normal pressure hydraulic fittings.


4. Standards for plug-in hydraulic pipe fittings


The commonly used plug-in hydraulic pipe fitting standards in China include GB/T 10422, JB/T 5026, ZSJ 03001, etc. Among them, GB/T 10422 is applicable to plug-in fittings for normal pressure and medium and low pressure hydraulic pipelines. JB/T 5026 is applicable to plug-in fittings for hydraulic systems with a pressure of 31.5MPa and below. ZSJ 03001 is the railway industry standard.


Application scenarios and precautions of hydraulic pipe fittings


Hydraulic pipe fittings are widely used in various high-pressure hydraulic transmission systems in petrochemical, metallurgical, shipbuilding, machinery, automobile and other industries. During use, the following matters need to be noted:


1. The model, specification and standard of the fitting must be consistent with the pipeline.
2. Before installation, the status of the fitting and the cleanliness of the pipeline must be checked to ensure sealing and connectivity.
3. The tightening force of the fitting should not be too large to avoid damaging the internal structure of the fitting.

4. When using hydraulic pipe joints, pay attention to the flow direction of the liquid to avoid accidents caused by misalignment of the joints.


In short, the size standard of hydraulic pipe joints is a vital part of the hydraulic system. The correct selection and use of hydraulic pipe joints can ensure the normal operation, safety and stability of the hydraulic system.
  

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