The Perth West Coast Desalination Project in Australia is a key local government project for water supply, responsible for the city’s seawater filtration, desalination, concentrated brine discharge, and pipeline transportation.

The coastal conditions are extremely challenging: high salt spray in the air, high chloride ion concentration in the seawater, and constant sea breeze humidity. Ordinary cast iron and carbon steel flanges can suffer severe corrosion and leakage within 1-2 months. All flexible pipe fittings for the project were required to be made entirely of 304 stainless steel.

Product Details

1. Material: 304 stainless steel integral flange, corrosion resistant and salt spray resistant

2. Rubber Ball: Seawater-resistant EPDM rubber, resistant to chloride ion aging

3. Specifications: DN80–DN400

4. Process: Large compensation capacity and strong displacement resistance

5. Applications: Seawater intake pumps, concentrated brine discharge pipelines, expansion joints and vibration damping of main pipelines

Operating Challenges

1. Seawater chloride ions are extremely corrosive, and ordinary rubber is prone to aging and cracking;

2. Slight settlement of the foundation near the sea results in large pipeline displacement;

3. High pipeline pressure requires extremely high structural strength of the product;

4.Long ocean transport distances require high-strength packaging, moisture-proof and rust-proof.

Our Optimized Solution:

1. The flange is made of 304 stainless steel with passivation treatment to resist salt spray corrosion from the sea.

2. A special seawater-resistant rubber formula delays aging and extends service life.

3. The product features double-layer steel wire reinforcement and multi-layer thickened fabric, providing explosion-proof and pressure-resistant performance.

Project Achievements:

A total of 850 304 stainless steel rubber expansion joints were delivered to the Port of Perth, Australia in three batches.

The product has operated stably in seawater and high-salt-spray environments for extended periods, showing no rust, bulging, or leakage, perfectly solving the problems of vibration reduction, expansion compensation, and foundation settlement in seawater desalination pipelines.

Client Feedback: The performance and stability of the domestically produced stainless steel rubber expansion joints far exceeded expectations, and its cost-effectiveness is superior to imported European and American brands. Multiple water projects in Western Australia have subsequently placed repeat orders.