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Fluid power hydraulics - parts, accesories

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Weldable elbow fittings

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Weldable elbow fittings 

Weldable elbow fittings are hydraulic components that allow the change of flow direction by 90 degrees. Their design permits a permanent connection on one side by welding it to the pipeline, while the other side has a thread that enables the connection of a hydraulic hose. This makes these fittings extremely versatile and applicable in many hydraulic systems. These fittings are made of high-quality materials, ensuring resistance to high pressures. Their precise manufacturing guarantees a perfect fit for pipes and threaded ends, minimizing the risk of leaks. The welded side provides durability and resistance to vibration and dynamic loads, while the threaded side allows for easy assembly and disassembly of the hydraulic hose.

Application of weldable elbow fittings

Weldable elbow fittings are used in various hydraulic installations where a permanent connection between a pipeline and a flexible hydraulic hose is required. They are commonly used in: the machinery industry, industrial installations, and high-pressure hydraulic systems. Thanks to the possibility of permanent welding and a threaded connection with a hose, they represent a reliable solution for systems requiring solid and leak-tight connections.

Wide selection of welding connectors and connections 

Hydron offers a wide selection of weldable elbow fittings that meet the highest quality standards. Our products are made of durable materials, tested for tightness and pressure resistance, guaranteeing their reliability even in the most demanding working conditions. Additionally, we provide professional advice, helping you choose the right fittings for your system. We offer competitive prices and fast shipping, so you can quickly improve your installations. We guarantee high quality and compliance with standards, which is confirmed by numerous certificates and positive reviews from our customers.

Technical specification

Technical parameter Value / Description
Product category Welding connections (straight weldable fittings / XAS and AS type)
Connection type 1 (weldable) Weld-on nipple with a welding bevel (for pipe or body)
Connection type 2 (threaded) Metric external thread with 24° cone (DIN 2353 / ISO 8434-1)
Available pressure series Light series L (6L–42L pipes) and heavy series S (6S–38S pipes)
Materials Carbon weldable steel (ST 37.4 / ST 52.4 / C15) or stainless steel AISI 316 (1.4571)
Maximum working pressure from 315 bar up to 630 bar (depending on the L/S series and pipe diameter)
Compliance with standards DIN 2353, PN-EN ISO 8434-1, ISO 8434-4
Operating temperature range from -40°C to +120°C (for weldable steel)

Hydraulic welding connections

Welding connections are components used for making joints in power hydraulics systems, where one part of the connection is permanently joined to a pipe or another element of the installation by welding. They allow for the preparation of a solid connection point for the rest of the hydraulic system.

This solution is used, among others, in the construction of piping installations, machine modernization, and the creation of custom hydraulic structures. The connection must be selected according to the pipe diameter, the type of mating connection, and the operating parameters of the specific system.

Weld-in connections in hydraulic installations

Welded connections are used where a permanent connection of an element to the piping system is required. Once correctly welded, the connection becomes part of the installation and creates a point that allows for the connection of further hydraulic components.

Such a solution can be used both during the execution of new installations and during repairs or rebuilding of existing systems. It allows for the adjustment of the placement of connection points to the design of a specific machine or device.

Where are welding connections used?

  • in power hydraulics systems,
  • in hydraulic piping systems,
  • in industrial machinery and equipment,
  • in the construction and modernization of hydraulic systems,
  • in the creation of custom connection points,
  • in service and construction work requiring a permanent connection to a pipe.

How to choose a welding connection?

The selection of a connection should begin with a precise determination of the component to which it is to be welded. The pipe diameter and the dimensions of the part intended for welding are of particular importance. Then, the type of connection on the other side of the component should be verified.

  • check the diameter of the pipe or the component intended for welding,
  • verify the dimensions of the connecting part,
  • determine the required standard for the further hydraulic connection,
  • check the sealing method of the mating components,
  • verify the technical parameters of the specific variant,
  • select the appropriate component for the design of the entire system.

Welded connection vs. threaded connection

The fundamental difference concerns the method of assembly. A welded connection is permanently joined to a pipe or another prepared installation element. A threaded connection, on the other hand, allows for assembly using properly matched threads and sealing surfaces.

In practice, both solutions can exist within a single system. A welding connection can form a permanent point of the installation, to which further hydraulic components are then connected.

What to pay attention to before welding the connection?

Before making the connection, ensure that the fitting has been correctly sized and positioned relative to the further layout of the installation. It is also important to properly prepare the surface and perform the weld according to the requirements for the given material and design.

If you are completing an installation or need a different connection method, also check straight hydraulic fittings and other hydraulic connectors available at HYDRON.

FAQ - welding connections

What are welding connections used for?

They are used to create a permanent connection point by welding the component into a pipe or another part of the hydraulic installation.

What needs to be checked before choosing a welding connection?

First and foremost, the diameter and dimensions of the component intended for welding must be checked, along with the type of connection required on the other side.

Can a welding connection work with a threaded connection?

Yes, if the design of the specific connection provides for a suitable threaded connection on the connecting side. The correct standard and size must be selected.

Is the welding method the same for every connection?

No. The technology used to create the joint should be adapted, among other things, to the material, the design of the components, and the requirements of the specific installation.