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February 15, 2025

How to Choose Rubber Expansion Joint?

The working pressure of Rubber Expansion Joints depends on factors such as material, structure, and size. Below are the pressure ratings for some common specifications of rubber expansion joints:

Low-pressure Rubber Expansion Joints: These have a working pressure generally below 0.1 MPa and are suitable for low-pressure piping systems such as water supply and drainage pipes, ventilation ducts, etc.

Medium-pressure Rubber Expansion Joints: These have a working pressure typically ranging from 0.1 MPa to 1.6 MPa and are suitable for piping systems with medium pressure requirements, such as industrial piping and chemical piping.

High-pressure Rubber Expansion Joints: These have a working pressure usually between 1.6 MPa and 10 MPa and are suitable for high-pressure piping systems in industries such as petroleum, chemicals, and power generation.

DN800 Rubber Expansion Joints: Typically, these can withstand a working water pressure of 10 kg and can undergo a factory test up to a water pressure of 15 kg. Another version of the DN800 Rubber Flexible Joint with a higher pressure rating of 16 kg can undergo a factory water pressure test up to 24 kg.

Threaded Rubber Flexible Joints: These usually have a working pressure of 10 kg, but in cases where the material is of good quality and the manufacturing process is more intricate, the pressure can reach up to 16 kg. When selecting rubber flexible joints, it is essential to choose based on the required working pressure of the piping system to ensure the safe operation of the Rubber Joints and piping equipment.

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