Why Add Flange Pup Joints?

Pipe pup joints are commonly used accessories in industrial pipeline connections, mainly used to connect pipes. ‌Common pipe pup joints include threaded pup joints and flange-connected pup joints.

What is a flange pup joint?

In the field of mechanical processing, flange is a widely used component. It usually consists of two circular discs, which are connected by threads in the middle and are used to connect pipes and pipe fittings. The flange pup joint is a variant of the flange. Compared with the ordinary flange, it has an additional shortened flange. This shortened section is the flange pup joint.

Why add a pup joint?

1. Improve sheet material utilization

The flange pup joint is to save raw materials and improve sheet material utilization by leaving a shortened section at the upper and lower ends of the ordinary flange.

2. Reduce costs

Since the main part of the flange is the same as the flange pup joint, but with a slight difference in length, the cost of the flange pup joint is lower than that of the ordinary flange, which is one of the reasons why many companies are willing to adopt this processing method.

3. Enhanced connection performance

For some special-purpose pipes and pipe fittings, if ordinary flange connections are used, it is difficult to ensure the reliability and safety of the connection. However, the use of flange pup joints can effectively improve the performance of the connection and reduce the risk of air leakage and water leakage.

What are the advantages of flange pup joints?

‌1. Compact structure‌

The length of the flange pup joints is relatively short, which can effectively reduce the volume and weight of the pipeline system and improve the compactness of the pipeline.

‌2. Good sealing performance‌

The connection between the flange casing pipe and the flange plate usually uses sealing gaskets or metal gaskets to ensure the sealing of the pipeline system.

‌3. Strong pressure resistance‌

The material of the flange pup joints is usually high-strength materials such as carbon steel, alloy steel or stainless steel, which has strong pressure resistance and corrosion resistance.

‌4. Easy installation and maintenance‌

The installation and maintenance of flange pup joints are very convenient, and the flange plate can be disassembled for inspection or replacement of pipelines.

What situations are suitable for?

Pup joints are widely used in industrial fields, such as chemical, petroleum, pharmaceutical, food and other fields. It is mainly used in the following scenarios:

1. In the pipeline system, when two sections of pipeline need to be connected, you can choose to use a short section to connect, which can not only maintain the integrity of the pipeline, but also facilitate maintenance and replacement.

2. When the pipeline system needs to be expanded or changed, by adding a short section connected by a flange, the pipeline system can be upgraded, and it can also save costs and space.

Summary

In short, the flange short section is an economical, practical and effective way to connect pipelines and pipe fittings. Its processing method is relatively simple, the cost is low, and it has a wide range of applications. It is suitable for the connection of various pipelines and pipe fittings, especially in some cases where the sealing degree of pipeline connection is high. It can give full play to its advantages and is an option worth adopting for many companies.