Because the contact interface between two dissimilar metals is highly susceptible to oxidation, when the two metals are joined, the interface quickly oxidizes, increasing the contact resistance. This triggers a vicious cycle: as resistance rises, heat generation increases, further exacerbating the problem and potentially leading to equipment failure or even combustion. The use of hydraulic transition fittings can effectively prevent this phenomenon.

(1) Pre-installation

(2) The addition of sealants or other filling materials is prohibited. To achieve better sealing, sealant was applied to the ferrule; as a result, sealant from the American-style threaded transition fitting was flushed into the hydraulic system, leading to blockage of hydraulic components.

(3) When connecting pipelines, sufficient deformation allowance shall be provided to prevent tensile forces in the pipeline.

(4) When connecting pipelines, lateral forces should be avoided; excessive transverse forces can compromise the seal.

(5) When connecting pipelines, perform the connection in a single operation to avoid repeated disassembly, as this can degrade sealing performance.

　　Transition joints are now widely used in our daily lives, particularly in pipeline connections and cable installations, where they have become an indispensable tool. Their importance has grown even further with the ongoing development of new infrastructure initiatives. As the most mainstream type of joint available today, I will now walk you through the various applications of transition joints and highlight the key considerations for their safe and effective use.

I. What are the applications of transition joints?

　　Overhead connectors are currently used in a wide range of applications, with their primary function being to join two pipes of different specifications. This is particularly evident in the telecommunications and power sectors. For instance, when a pipe’s material does not allow it to be bent, an overhead connector must be used to join two sections of pipe, thereby achieving the desired bending effect.

　　II. Precautions for Splicing Joints

　　During the installation of transition fittings, it is essential to verify that the pipe diameter matches the bore diameter of the fitting and to implement effective leak-proof and corrosion-resistant measures throughout the installation process. After all, whether the piping is used to protect cable optical fibers or to convey liquids and gases, maintaining tight sealing is a fundamental requirement. At the same time, in addition to ensuring adequate sealing, appropriate anti-corrosion treatment must also be applied.

　　The foregoing discussion has outlined the applications of transition joints and the key considerations during installation. Today, this product is widely used in the power and telecommunications industries, particularly driven by the rapid development of new infrastructure, which has led to a substantial increase in market demand for transition joints. By understanding these issues, users can avoid many unnecessary problems in future applications.

Many people have never heard of hydraulic pipe fittings, let alone know what they are used for. After conducting research on relevant materials, the editor would like to share with you the working principle and cleaning methods for hydraulic pipe fittings, in the hope that this information will be helpful.

I. Introduction to Hydraulic Pipe Fittings

　　A hydraulic pipe fitting is a connecting component that joins high-pressure oil pipes to one another. It comes in many types, including welded pipe fittings, high-pressure hoses, adapter pipe fittings, and high-pressure ball valves.

　　II. Principle of Hydraulic Pipe Fittings

　　Different types of pipe fittings operate on different principles. Here, we will focus on the principle behind welded pipe fittings. As the name suggests, these fittings are manufactured by welding, with a circular seal between the fitting and the pipe. This type of fitting has a relatively simple structure, low manufacturing costs, and is easy to produce, while also offering good sealing performance. However, it places very high demands on welding quality and is inconvenient to install and remove.

　　III. Cleaning of Hydraulic Pipe Fittings

　　Hydraulic pipe fittings are cleaned either by kerosene cleaning or acid pickling. Kerosene cleaning is primarily used for copper and stainless steel pipes: first, disassemble the pipe and fitting to be cleaned; then, use a cloth dipped in kerosene to wipe the inner surfaces; finally, immerse both ends of the pipe and the fitting directly in kerosene for further cleaning. The cleaning standard is that no contaminants visible to the naked eye should remain. Acid pickling is mainly applied to severely rusted steel pipes: first degrease the surface, then rinse with water, followed by rust removal, and finally neutralize with an alkaline solution—taking care not to wash away any markings on the pipe.

　　That concludes our introduction to the principles and cleaning methods for hydraulic pipe fittings. We hope that, after reading this article, you will have a better understanding of hydraulic pipe fittings.