Rubber Expansion Joints Successfully Applied in Indonesia Municipal Wastewater Treatment Project
Project Name: Phase Expansion Project of a Municipal Wastewater Treatment Plant (WWTP) in Jakarta, Indonesia
Supplied Product: DN800 / PN16 Double Flange Rubber Expansion Joint with Control Rods (EPDM)
Application Location: Piping Connections in the Influent Pump House
Project Highlight: Customized anti-corrosion, limiting, and vibration-damping solutions tailored for high-temperature, high-humidity Southeast Asian environments and strong-vibration conditions.
I.On-Site Conditions and Technical Challenges
Anti-Bursting & Control Rod Requirements: The operating pressure of the main pipeline reaches 1.0–1.2 MPa. If standard rubber joints without control rods were used, the pipeline's internal pressure would easily cause over-elongation or even pull-out of the rubber body.
Wastewater Media Corrosion: The influent contains industrial wastewater components and trace organic solvents. Standard Natural Rubber (NR) is prone to swelling, aging, and cracking under these conditions.
Environmental Corrosion Protection: Jakarta features a tropical rainforest climate with high ambient humidity. Standard carbon steel flanges and rods are highly susceptible to rust and corrosion.
II.Runtaida Technical Solution & Selection Details
1. Material and Structural Optimization
Rubber Body Material:
Made of premium EPDM rubber, reinforced internally with multiple layers of high-strength nylon cord fabric and interwoven steel wire skeletons. This ensures a rated pressure of PN16 (1.6 MPa) and a burst pressure exceeding 4.8 MPa.
Control Rod Assembly (Anti-Pullout Device):
As shown in the on-site image, the joints are configured with high-strength limit rods. The nut positions are pre-calibrated based on the maximum allowable axial displacement of the pipeline (axial movement ≤ 25mm). This locks the pressure within a safe range and completely eliminates the risk of joint pull-out caused by water hammer impacts.
2. Anti-Corrosion and Rust Protection Treatment
Flange & Rod Anti-Corrosion: The carbon steel flanges and control rods are hot-dip galvanized and subsequently coated with epoxy resin (Epoxy Coating). This effectively resists corrosion from the humid Southeast Asian environment and water vapor.
Bolt Fastening Standard: High-strength hot-dip galvanized bolts are used to guarantee long-term vibration resistance without loosening.
Runtaida double flange rubber expansion joint with limit control rods installed in Indonesia wastewater treatment plant project:
III.Quality Control & Delivery
Before leaving the factory, this batch of industrial rubber expansion joints successfully underwent rigorous burst pressure and tightness testing, with all technical indicators fully complying with mainstream international pipeline standards.
On-site view of actual pressure testing at a rubber expansion joint factory:
Runtaida specializes in providing premium Rubber Expansion Joints, stainless steel flexible metal hoses, corrugated bellows expansion joints, and other critical piping components, alongside customized engineering solutions for municipal wastewater treatment, desalination, and various industrial piping networks worldwide.
Our products have been successfully exported to over 113 countries and regions globally, fully safeguarding the long-term safety and reliable operation of engineering pipelines.
Get Free Technical Selection Advice & Factory-Direct Quotes
Sales & Technical Support: info@runtaida.com
WhatsApp: +86-15517589658
Explore More: Rubber Expansion Joints | Metal Hoses | Bellows Expansion Joints