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Ball nipple for welding 16-32 PN-138 35L

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Manufacturer: HYDRON hydraulika siłowa (go to products)

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Ball nipple for welding 16-32 PN-138 35L

The ball nipple for welding 16-32 PN-138 35L is a hydraulic fitting element designed for making connections in oil systems. The product is made of free-cutting steel, and its surface is protected with an anti-corrosion layer of white galvanized zinc passivation. The nipple is intended for welding and belongs to the light L series, for which the specified pressure is up to 16 MPa (160 bar).

The product is manufactured according to the Polish Standard PN-65/M-73138. The characteristic spherical end is designed to work with a properly selected connecting element. This solution enables the creation of pipe installations where part of the connection is permanently joined by welding, and the remaining fitting elements are selected according to the requirements of the hydraulic system.

Technical parameters of the ball nipple 16-32 PN-138 35L

Product type: ball nipple for welding.
Product designation: 16-32 PN-138 35L.
English name: Ball Nipple for Welding.
Manufacturing standard: PN-65/M-73138.
Series: L – light.
Pressure for light L series: up to 16 MPa (160 bar).
Material: free-cutting steel.
Protective coating: zinc-plated with white passivation.
End type: spherical.
Assembly method: welding.
Intended use: hydraulic oil systems.
Application: connections of hoses and hydraulic installation components.

Application of the ball nipple in power hydraulics

The ball nipple PN-138 16-32 35L is used for making connections in hydraulic oil systems. It can be used during the construction, repair, and modernization of piping installations for machines and devices equipped with power hydraulic systems. Its design allows for a welding end, which forms part of a properly selected connection assembly.

Elements of this type are used in the installations of industrial machinery, agricultural and construction equipment, and hydraulic power units. The selection of a specific nipple should take into account the dimensions of the hose, the type of mating connection, and the operating conditions of the installation.

Construction of the ball nipple for welding

The nipple features a characteristic spherical surface and a part intended for making a welded connection. The spherical profile enables interaction with a properly matched surface of the second connector element. The use of the correct geometry of the mating parts is essential for achieving proper pressure and connection tightness.

When completing the fittings, dimensions, end profile, and compatibility with other parts must be verified. Elements should not be selected solely based on visual similarity or nominal diameter designation.

Standard PN-65/M-73138 and designation 16-32 PN-138 35L

The nipple was manufactured according to the Polish Standard PN-65/M-73138. The designation 16-32 PN-138 35L allows for the identification of a specific variant when selecting fittings, searching for appropriate connection elements, and ordering parts for existing installations.

When choosing a replacement, the full product designation and its dimensions should be compared with the documentation of the connection being used. Maintaining the 35L symbol is particularly important as it allows for distinguishing this variant from other ball nipples in the same product group.

Light L series – pressure up to 16 MPa

The ball nipple 16-32 PN-138 35L belongs to the light L series. According to the product data, this series is intended for pressure up to 16 MPa, which is 160 bar. Within the ball nipple family, there is also a heavy S series, for which the pressure is specified up to 32 MPa (320 bar). However, this is a separate manufacturing group and this value should not be attributed to the 35L nipple.

The permissible pressure of the complete installation also depends on the pipe, the quality of the welded connection, and the parameters of the other fitting elements. During design and assembly, the limitations of the entire assembly must be considered, not just the designation of the nipple.

Free-cutting steel and zinc plating with white passivation

The product is made of free-cutting steel. The surface of the nipple is protected by white galvanized passivation, which provides a protective layer limiting corrosion under appropriate conditions of use and storage.

Since the nipple is intended for welding, the surface preparation and the method of performing the weld should correspond to the material grade used and technological requirements. In the welding area, the zinc coating requires appropriate removal, and after making the connection, anti-corrosion protection of the processed area must be ensured. Welding galvanized elements also requires effective ventilation and protection against harmful fumes.

Selecting a ball nipple for a hydraulic installation

Before selecting a nipple, verify the compatibility of the 16-32 PN-138 35L designation with the installation requirements. The dimensions of the part intended for welding, the geometry of the spherical surface, and the fit of the mating connector element are important. The material and dimensions of the hose in which the nipple will be mounted should also be taken into account.

When replacing an element in an existing installation, it is worth comparing the designation of the previous nipple with the technical documentation. Matching diameter or a similar end shape does not guarantee the possibility of safe interchangeable use of elements.

Preparation and assembly of the nipple by welding

Before starting assembly, the technical condition of the nipple, hose dimensions, and the cleanliness of the surfaces to be joined must be checked. The element should be positioned according to the geometry of the installation so that no undesirable stresses or deformations occur after making the connection.

Welding should be carried out according to the appropriately selected technology, taking into account the properties of the material. The spherical surface must be protected from splashes, mechanical damage, and contamination. After finishing work, it is necessary to check the weld quality, clean the inside of the hose, and perform the required leak test.

Key features of the ball nipple PN-138 35L

Manufactured according to the Polish Standard PN-65/M-73138.
Full variant designation: 16-32 PN-138 35L.
Intended for welding.
Characteristic spherical end.
Made of free-cutting steel.
Anti-corrosion coating: white galvanized passivation.
Light L series up to 16 MPa (160 bar).
Application in hydraulic oil systems.
Can be used during the construction and repair of piping installations.

Technical specification

Parameter	Value
Name	Ball nipple for welding
Designation	16-32 PN-138 35L
Standard	PN-65/M-73138
Series	L – light
L series pressure	Up to 16 MPa (160 bar)
Material	Free-cutting steel
Coating	Zinc plating, white passivation
Assembly	Welding
Application	Hydraulic oil systems

Frequently Asked Questions (FAQ)

What is the ball nipple 16-32 PN-138 35L used for?

The product is used for making pipe connections in hydraulic oil systems. It is intended for welding and interaction with properly selected fittings.

According to which standard was the ball nipple manufactured?

The nipple was manufactured according to the Polish Standard PN-65/M-73138.

What pressure is the light L series intended for?

According to the product data, the light L series is intended for pressure up to 16 MPa, which is 160 bar. The parameters of the finished connection should be considered together with the pipe, the weld, and the mating fittings.

What material is the 35L nipple made of?

The nipple is made of free-cutting steel and covered with a protective layer of white galvanized zinc passivation.

Is the L series nipple interchangeable with the S series?

These series should not be treated as automatically interchangeable. The L and S variants belong to different manufacturing groups, so the compatibility of dimensions and other connection parameters must be confirmed before replacement.