Pipe Solutions
Grooved Duplex SS Flexible Coupling







Description
The Duplex Stainless Steel Flexible Coupling provides a robust mechanical joint for roll grooved and cut grooved stainless steel piping systems. Available in sizes from ¾” to 6″, it features duplex or super duplex stainless steel construction and a WRAS-certified EPDM gasket. Ideal for durable and reliable connections in demanding environments.
Engineered for both strength and flexibility, this coupling is designed to accommodate misalignments, thermal expansion, and contraction without compromising the integrity of the joint. The duplex stainless steel body offers exceptional resistance to corrosion, chloride stress, and pitting—making it suitable for marine, offshore, chemical, and wastewater applications.
The WRAS-certified EPDM gasket ensures a secure, leak-free seal while complying with stringent potable water standards. Its flexible construction absorbs vibration and noise, contributing to smoother system operation and reduced mechanical stress on the pipes.
Installation is simple and efficient, requiring no welding, threading, or special tools—significantly reducing downtime and labor costs. The coupling’s reusability and low maintenance requirements make it a cost-effective solution over the long term.
Technical Data
PN | Up to 500 Psi (34.5 bar) |
DN | ¾” – 6″ (DN20 through DN200) For sizes 8 – 18″ (DN200 – DN450) stainless steel 316 flexible couplings |
Medium | Water, ultrapure water, seawater |
Material | Duplex stainless steel (CE8MN) conforming to ASTM A-890 Optional Housing: Super Duplex stainless steel (CE3MN) conforming to ASTM A-890 |
Gasket | EPDM, NBR, Nitrile, Fluoroelastomer, Silicone |
Bolts & Nuts | Stainless steel A4 (SS316) |
Coating | No coating |
Application | Firefighting | HVAC | desalination plants | Pumping stations | utilities | Wastewater treatment plants | Seawater desalination plants | Power plants | Chemical plants | clean room applications |