36 inch DN900 Double Sphere Rubber Expansion Joints for Bangkok Water Project

Project Background: Municipal water supply network expansion and pump station upgrade project in Bangkok, Thailand
Product Name: DN900 (36") Double-Sphere Flexible Rubber Expansion Joint with Center Reinforcing Ring
Purchase Quantity: Customized bulk purchase

Recently, a leading water treatment infrastructure contractor in Thailand sought our professional assistance. At the site of their industrial water supply network expansion project, the proximity of a large-diameter pipeline to a wall cutout and a major elbow subjected the system to intense mechanical vibrations and potential alignment stresses. The client urgently needed a High-Pressure Pipeline Vibration Isolation Solution that could accommodate multi-directional displacement, withstand high working pressure, and ensure long-term, maintenance-free operation.

 

Solution: Precision Customization of Double-Sphere Rubber Expansion Joint
1. Premium Rubber Compound Formulation (EPDM/Natural Rubber)
Due to the humid tropical climate and specific medium characteristics in Thailand, the flexible rubber shell is engineered with an advanced rubber compound. This provides exceptional resistance to aging, fatigue, and ozone crack propagation, significantly extending the service life of the piping network.

 

2. Center Reinforcing Ring for High-Pressure Stability
To handle the demanding pressure profiles of the Bangkok facility, this DN900 (36") joint features a robust center reinforcing ring (control ring) between the two arches. This solid metallic ring prevents the rubber body from over-expanding or distorting under high working pressures, ensuring structural integrity and maintaining consistent performance.

 

3. Heavy-Duty Carbon Steel Reinforcing Flanges
Features rugged carbon steel flanges combined with high-tensile backing rings. Precision-bolted connections ensure a completely leak-proof seal and superior structural integrity, perfectly preventing blowouts even under severe pressure spikes or water hammer effects.

 

4. Enhanced Multi-Directional Displacement & Vibration Absorption
Compared to standard single-sphere models, the double-sphere resilient body dynamically absorbs much larger axial elongation, lateral deflection, and angular angularity caused by thermal expansion or pump operation. It acts as an elite pipeline shock absorber, shielding the fragile wall structure and downstream valves from catastrophic stress.

The following are photos of the field application provided by the engineers:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Optimize Your Piping System Today:

If you are looking for high-pressure, long-life piping connection solutions that meet international standards, please feel free to contact our team of engineering experts. As a professional piping equipment manufacturer exporting to over 106 countries and regions (Europe, the Middle East, Asia, and Africa), we offer not only standard-specification products but also customized piping system solutions.

 

Need a reliable piping solution for your project? Contact our engineering experts today for a quick technical assessment and custom quote!

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