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Intermediate sleeve Ø18 (for flaring)

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€1.63

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Manufacturer: HYDRON hydraulika siłowa (go to products)

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Intermediate sleeve Ø18 for flaring hydraulic pipes

Intermediate sleeve Ø18 for flaring is a connection element designed for making connections of steel hydraulic pipes with an external diameter of 18 mm. It is used in flared connection systems where the end of the pipe is appropriately shaped, and the sleeve works with a nut and a matching fitting. The solution is used in power hydraulics, piping installations of industrial, agricultural, and construction machinery, as well as during repairs and modernization of hydraulic systems.

The Ø18 designation refers to the external diameter of the mating pipe being 18 mm. The sleeve is an element of the flaring system and is not a replacement for a cutting ring or a sleeve for crimping flexible hydraulic hoses. When selecting, consider the geometry of the connection, the pipe wall thickness, and the type of mating nut.

Technical parameters of the intermediate sleeve Ø18

Product type: intermediate sleeve for flaring.
Nominal size: Ø18.
External diameter of the mating pipe: 18 mm.
Type of connection: flared pipe connection.
Purpose: steel hydraulic pipes.
Application: power hydraulics and industrial piping systems.
Mating elements: properly selected nut, flared pipe, and fitting.
HYDRON product code: TUL POŚ FI 18.

Application of Ø18 sleeve in power hydraulics

Intermediate sleeve Ø18 is used during the making of pipe connections in power hydraulic systems. Properly selected flared connections are used in the supply and control circuits of machines and in industrial installations where a connection of a rigid steel pipe with hydraulic fittings is required.

The element can be used during the implementation of new installations, replacement of pipe sections, servicing of hydraulic units, and repair of machine piping. Its task is to work with flared joint elements. Safe operation depends on the correct fit of all parts and the proper preparation of the pipe end.

How does the Ø18 flared pipe connection work?

A flared connection is created by appropriately forming the end of the steel pipe using a flaring tool. The pipe end prepared in this way works with the surface of the fitting, and a matching nut provides the required pressure. The intermediate sleeve is a supporting element that works with the connection, allowing the correct transfer of assembly forces.

The tightness of the finished assembly depends on the flare geometry, the cleanliness of the sealing surfaces, and the correctness of the assembly. Improper forming of the pipe end can lead to hydraulic oil leakage. Stronger tightening of the nut alone does not replace proper preparation of the connection.

Selection of intermediate sleeve for 18 mm steel pipe

The primary selection dimension for the Ø18 sleeve is the pipe external diameter of 18 mm. However, one should also consider the wall thickness, the type of flare being made, and the geometry of the nut and fitting. Pipes with the same external diameter can have different wall thicknesses, which affects the requirements for forming their ends.

When completing the connection, one can consider the 18x2 mm precision pipe and the 1.1/16 UNF Ø18–20 flare nut offered in the HYDRON catalog. Before assembly, it must be confirmed that the sleeve, nut, and fitting belong to a compatible connection system. The size Ø18 alone does not confirm full compatibility.

Flare sleeve vs. cutting ring

The intermediate sleeve for flaring and the cutting ring are elements of different connection solutions. In the flared system, the pipe end is formed before assembling the connection. In contrast, in the cutting system, the ring clamps onto the surface of the pipe during assembly. Both solutions require appropriately selected nuts and fitting bodies.

The Ø18 sleeve is also not a crimp sleeve for hydraulic hoses. Fittings for flexible rubber hoses are selected according to the nominal diameter of the hose, its construction, and the type of end fitting. The described product is intended for rigid piping.

Assembly of Ø18 sleeve and pipe preparation

Before making the connection, check the pipe diameter, wall thickness, and surface condition. The end should be prepared evenly, cleaned, and formed according to the flare system requirements. Do not use pipes with cracks, dents, or damage that could impair the tightness of the connection.

The sleeve and nut should be placed on the pipe in the correct order, according to the connection design. After flaring, check its shape and surface condition. During installation assembly, avoid stresses, twisting the pipe, and forcing the pipe into an incorrect position. After assembly is complete, a leak test should be performed under conditions appropriate for the installation.

Advantages of the Ø18 intermediate sleeve

Designed for flared steel pipe connections.
Size matched to a pipe with an external diameter of 18 mm.
Can be used in power hydraulics.
Useful during construction and repair of piping installations.
Works with a properly selected nut and fitting.
Possibility of replacing a single connection element.
Application in the service of industrial and mobile machinery.

Technical specification

Parameter	Value
Product name	Intermediate sleeve Ø18
Connection type	Flared
Pipe external diameter	18 mm
Purpose	Steel hydraulic pipes
Application area	Power hydraulics, piping installations
Product code	TUL POŚ FI 18
EAN	5905009151010
Unit of sale	piece

Frequently Asked Questions (FAQ)

Which pipe does the Ø18 intermediate sleeve fit?

The sleeve is designed for flared connections of steel hydraulic pipes with an external diameter of 18 mm. It is also necessary to check compatibility with other connection elements.

Is a nut required for the Ø18 sleeve?

Yes. A complete system connection requires a suitable nut and fitting. Their size and design must correspond to the pipe used and the flare geometry.

Does the Ø18 sleeve replace a cutting ring?

No. The intermediate sleeve for flaring is intended for a different connection system than a cutting ring. These elements should not be used interchangeably.

Can the sleeve be used for a hydraulic hose?

No. The Ø18 sleeve is designed for flared steel pipes. Other types of crimp sleeves are used for crimping flexible hydraulic hoses.

Does the Ø18 sleeve fit an 18x2 mm pipe?

An 18x2 mm pipe has the correct external diameter of 18 mm. Before making the connection, the permissible wall thickness and compatibility of the flaring system must be additionally confirmed.