How to choose soft joints for pipes?

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How to choose soft joints for pipes?

Flexible flange is a cushioned product, a rubber ring used to pair between two water pipes, which can be stretched within a certain limit. The coupling is capable of selecting the deviation of the pipe to elastic and compensate the deviation that adversely affects the pipe.

Currently, Soft Joints are widely used, mainly in industrial zones, residential areas ... To ensure stability and safety for pipes before the impact, impact from the environment. But the choice of Soft Coupling for any type is reasonable, not everyone knows, this article will help you have the most effective choice.

General application of Soft Joints

Regardless of where we can catch the used coupling, maybe in any industry.

  • Used in industrial pipes, anti-vibration, saving installation time and maintenance.
  • Installed in high pressure pump pipe
  • Used in the maritime industry.
  • Fire protection system
  • Used in industrial production and chemical treatment, waste water ...
  • High pressure boiler system
  • And many other industries ...

Classification of soft joints

  Currently on the market there are many different joints, the quality is also different. To choose the right type you need, you only need to understand a little about each type of product. Thereby, it will be easier to choose for the purpose that you use, to achieve the best efficiency.

Sort by mounting type

This type of classification is based on the installation of Soft Coupling with water pipes.

  • 2 flanged flexible couplings
  • Soft joint BE DN100, EE
  • 2-threaded flexible couplings

Classify according to the material of the coupling

Soft coupling with Gang

Joint construction of Gang:

  • The body of the BE coupling is cast entirely from cast iron steel.
  • Screw bolts are made from high quality stainless steel, increase bearing capacity, strengthen more firmly against corrosion, rusty, durable and beautiful with time ...
  • Rubber gasket consists of tapered Zo-mount which is installed on the inside of the coupling, which has a tooth shape that increases contact with the tube. Zang flanges on the outside make handling easier.

Ứng dụng khớp EE, BE

  • The flexible coupling helps the construction speed reach new, efficient and safe steps during the operation of the system, because of using a mixture of different substances, it is very safe.
  • Easy to maintain and maintain the piping system, reduce costs and save time.
  • This type of connection is suitable for many standards, different types of pipes and allows for large tolerances in cases of external forces.
  • Can withstand high pressure, pressure up to 20kg - 30kg
Couplings made of stainless steel

Joint construction:


Stainless steel couplings are made entirely of stainless steel or stainless steel 304, 309, including rubber rings, fixed bolts and couplings ....

Stainless steel coupling application

Stainless steel flexible couplings are often used for pressure pumps and piping systems. Stainless steel couplings will work in reducing vibration, saving installation time, maintenance as well as saving costs effectively and optimally.

Stainless steel flexible couplings can withstand great pressure, contributing to misalignment, reducing the forces acting on the pipe. This will contribute to ensuring the safety of the pipeline in the operational phase.

This sample device is also widely used in water treatment plants, chemicals, marine, drainage systems ...

Rubber coupling

Rubber joint construction
  • Rubber flexible couplings consist of three layers, nylon retaining layers, both internal and external layers are made of EPDM rubber.
  • Body: Weatherproof CR synthetic rubber, NBR oil resistant, EPDM for water use.
  • Reinforced layer: Nylon.
  • Cushion: Hard steel wire.
  • Flanges: Soft galvanized steel.
  • Pressure: 16 Bar.
  • Working temperature: -10 to 80 ° C.
  • Vacuum pressure: 700 MM / HG.

Application of soft rubber joints

Ensuring the piping system in production units, industrial parks, high-rise apartment buildings, ... always withstand the great pressure of water and withstand the change of sudden temperature

Reduce the noise, vibration, vibration of the piping system during operation.

Rubber pipe joints are mainly used in installation of pump systems.

Used for installation at important locations in the plumbing system, eyebrow positions that have a high level of movement and cause great pressure to the system.

Rubber expansion joints help compensate for deviation for movement and pressure, in addition to increase flexibility and convenience for piping systems at the units, ensuring excellent safety. For, help the system operate in the most efficient way.

Vibration-resistant rubber joints are widely used in wastewater treatment, chemical industry, ... and many other industrial piping systems.

Select standard, optimal soft joints when using

Need to know the specifications

Customers who buy soft joints should know the technical parameters such as:

  •     Diameter or size of coupling?
  •     What is the pressure at the junction?
  •     What is the coupling length?
  •     Connecting flanges of steel or stainless steel, rubber
  •     Standard flange is what standard
  •     Which thread connection type: inner thread, outer thread or tapered thread
  •     How much is the lace?
  •     Threaded steel or stainless steel?
  •     The coupling length is how much
  •     Environment used for coupling is what environment, water, gas, petroleum ...

Knowing the above issues helps customers buy couplings to ensure the most

Do not look for cheap Couplings

Many customers find and like to buy products at low prices, much lower than the market price. The majority of cheap products are poor quality goods, unknown origins, production stamps. This leads to poor quality of products that do not guarantee equipment standards, causing unsafety in the process of using the product. This is extremely dangerous, leading to money loss, customers should pay attention.

Should buy soft coupling at prestigious and quality facilities

Customers should not underestimate the selection of soft coupling facilities, reputable facilities will provide good quality products. Best customers should use soft coupling imported from abroad, to ensure the standard and quality, safe to use.

In many cases, the imported couplings are not available in the size required by the customer, customers can also choose reputable distribution facilities to order the goods as desired.

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