Flexible Couplings(For DI Pipe Only)

Specification 

Standard: ISO2531，EN545

Pressure: PN10/PN16/PN25

Body material: Ductile iron with FBE ( fusion bonded epoxy) coating or Epoxy painting; Gaskets are NBR or EPDM;

Bolts and Nuts: Carbon steel with galvanized zinc plated G4.8/G8.8, or SS304/SS316

Package: wooden cases and protection layer.

Application:

Flexible flange adaptor is also dedicated flange adaptor, straight flange adaptor. It can fit ductile iron pipes only.

Flexible Couplings(For DI Pipe Only)

Flexible Couplings(For DI Pipe Only)

Flexible couplings designed specifically for ductile iron (DI) pipes play a vital role in pipeline systems.

1. Structure and Design

These couplings are engineered with a combination of high-quality materials. They usually consist of a rubber sleeve that provides flexibility. The rubber is reinforced to withstand the internal pressure of the pipeline and external mechanical stresses. On either side, there are metal flanges or collars made of materials compatible with DI pipes. These metal parts are designed to firmly grip the DI pipes, ensuring a secure connection.

2. Function and Benefits

Flexibility: They allow for angular, axial, and lateral misalignments between DI pipes. This is crucial as it compensates for minor settlement, thermal expansion and contraction, and vibration in the pipeline. For example, in a long-distance water supply pipeline made of DI pipes, temperature changes can cause the pipes to expand and contract. The flexible coupling can accommodate these length changes without causing damage to the pipes or joints.

Sealing: The rubber sleeve creates an effective seal, preventing leakage of fluids carried by the DI pipes. Whether it's water, gas, or other substances, the tight seal ensures the integrity of the pipeline system.

Shock Absorption: They can absorb shocks and vibrations that may occur in the pipeline, such as those caused by sudden changes in fluid flow or mechanical impacts. This helps to extend the lifespan of the DI pipes and other components in the system.

3. Applications

Flexible couplings for DI pipes are widely used in various industries. In municipal water supply and drainage systems, they are essential for connecting different sections of DI pipes in underground pipelines. In industrial settings, they are used in processes that involve the transportation of fluids through DI pipes, like in chemical plants or power generation facilities where reliable and flexible pipe connections are required.