What is a 90 degree elbow？

90 degree elbow is a pipe connection apparatus, its role is to change the flow direction of the pipe, and make the pipe in the vertical direction to turn 90 degrees. It is usually composed of elbow flange, sealing ring and other parts, can connect two mutually perpendicular pipes. In pipeline engineering, 90-degree elbow is widely used, the following will be the structure of the 90-degree elbow, classification, production process, application and precautions and other aspects of a detailed introduction.

Structure of 90 degree elbow

The 90 degree elbow is generally composed of three parts: elbow, flange and seal. Among them, the elbow is a pipe made of steel plate bending, at both ends of the elbow through the flange to connect with other pipes, the flange is usually made of steel or cast iron, with flange bolts to fix it on the pipe. The sealing ring is mainly a seal at the interface.90 degree elbow has a simple structure and a high degree of modularity, which makes it easy to install, dismantle and maintain.

Classification of 90-degree elbow

According to the material can be divided into: steel 90-degree elbow, cast iron 90-degree elbow, stainless steel 90-degree elbow. According to the manufacturing process can be divided into: forging 90-degree elbow, cold-drawn 90-degree elbow, hot extrusion 90-degree elbow, hot-formed 90-degree elbow. According to the wall thickness can be divided into: thin-walled 90-degree elbow, thick-walled 90-degree elbow. According to the use of occasions can be divided into: general 90-degree elbow, high-pressure 90-degree elbow, corrosion-resistant 90-degree elbow.

The production process of 90 degree elbow

Commonly used production methods include: forging, stamping, hot extrusion, hot bending and so on. Among them, the forging method is a traditional production method, its advantages are good material properties, strong corrosion resistance, high structural strength, but the production cost is higher. Hot extrusion method is a modern production method, its advantages are low production costs, stable performance, wide range of specifications, but compared with forging, processing accuracy is slightly worse. At present, the hot bending or cold bending method has become the mainstream process of making 90-degree elbow.

Application of 90 degree elbow
90 degree elbow is widely used in various piping systems, such as water, oil, gas, chemical industry. In municipal engineering, 90-degree elbows are commonly used in underground pipeline bends to adapt to changes in terrain. In construction engineering, 90-degree elbow is usually used for air conditioning, heating, piping and other equipment interfaces to change the direction of pipeline flow, in mechanical engineering, 90-degree elbow is also one of the important components for connecting a variety of hydraulic and pneumatic pipelines.

Precautions for 90-degree elbow

Select the appropriate material, according to the actual working conditions to choose the appropriate 90 degree elbow, such as corrosion resistance, high pressure resistance and other special materials.
Determine the correct size, according to the diameter and thickness of the pipeline and other parameters, select the appropriate specifications and models.
Check whether the installation process is correct, check whether it is tightly connected with other pipelines, and whether the seal is properly installed.
Routine inspection and maintenance, regularly check the sealing performance of 90-degree elbow, and timely replacement of damaged parts.

90-degree elbow is an indispensable and important part of the modern industrial field, its simple structure, wide range of applications, production process varied, play an extremely important role in industrial production. In the selection and use of 90-degree elbow, need to be based on the actual situation for comprehensive consideration, in order to ensure the safety and reliability.