What are the classifications of commonly used high-pressure steel-wire-reinforced hoses?

Release date:

2022-04-02

Author:

Regarding hose classification, which types are most commonly used? What are their applications? This industry is experiencing strong demand. First and foremost, high-pressure steel‑wire‑reinforced hoses are widely employed. Thanks to their excellent pressure resistance and oil resistance, they are suitable for equipment connections, construction machinery, hydraulic supports, and other applications, with maximum pressures reaching 70 MPa.

　　Regarding hose classification, which types are most commonly used? What are the typical applications of hoses? This industry is experiencing a supply shortage. First, High-pressure steel-wire-reinforced rubber hose It is very commonly used. Thanks to its excellent pressure resistance and oil resistance, it can be employed in equipment connections, construction machinery, hydraulic supports, and other applications. It can withstand pressures as high as 70 MPa.

High-pressure steel-wire-reinforced rubber hose

　　For fabric-reinforced rubber hoses, the range of applicable fluids is broader, accommodating industrial water, slurry, hydraulic oil, emulsified oil, hot water, and sweep steam. Large diameter. High-pressure steel-wire-reinforced rubber hose , six plies of cord and a single layer of helical steel wire, for use under negative pressure.

　　The products with the highest export volumes are steel‑braided hoses and ordinary hoses, while higher‑tech automotive hoses account for a relatively small share of exports. Fiber‑reinforced wound hoses, braided hoses, steel‑wire‑braided hoses, wound hoses, and resin‑lined hoses together comprise more than 60% of total hose exports, approaching internationally advanced levels.

　　Because the product structure complies with international standards, it facilitates the export of China’s rubber hose products. The production capacity for key rubber hose products ranks among the highest in the world. Despite these favorable conditions, actual export volumes remain relatively modest. According to relevant authorities, in recent years, annual exports of rubber hoses have accounted for less than 1% of total annual rubber‑product exports, 9.5% of annual tire exports, and 1.4% of annual rubber‑shoe exports. Furthermore, estimates indicate that exports of Chinese rubber hoses represent approximately 10% of the sector’s total output value.

　　Connection types for high-pressure steel-wire-reinforced hoses and precautions for conical sealing:

　　1. Hose fittings can generally be classified into two types: internal-threaded and external-threaded.

　　1) Internal thread type

　　This type of structure is generally suitable for applications with low working pressure and high flow rates. This connection allows the hose diameter to be appropriately increased, and its sealing performance depends primarily on the sealing ring. High-pressure steel-wire-reinforced rubber hose.

　　2) External thread type

　　This type of connection is primarily used under high pressure, especially when the working pressure exceeds 1,800 bar. In this configuration, a locknut presses against an externally threaded fitting, ensuring that the tapered sealing surfaces of the pipe section tightly engage with the fitting’s sealing surface, thereby providing a secure seal. It can also be used to connect high-pressure spray guns and other accessories. This connection method effectively prevents loosening even under demanding installation conditions.

　　2. High-pressure steel-wire-reinforced rubber hose Precautions for Assemblies Using Tapered Seals

　　1) The taper angle of this fitting is 60 degrees, and the taper angle at the tube end is typically less than the hole’s taper angle by 1 degree.

　　2) The pipe end must remain sharp and must not be blunted;

　　3) The thread direction between the pipe end and the lock nut shall be opposite to that of the external threaded joint.

　　4) When machining the joint, a drain hole should be provided at the sealing location to prevent high-pressure water leakage in the event of an imperfect conical seal. This not only serves as a safety warning but also facilitates observation and diagnosis, thereby better protecting the sealing surface from damage.

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