Advanced Connection System
Our DI socket fittings feature EX joints. This system provides superior performance. These fittings ensure perfect connections. They work with all ductile iron pipes. Choose our advanced joint solutions.
Product Features
EX expansion joint geometry: Socket cavity is engineered with controlled clearance that houses a double-lipped gasket, enabling simultaneous angular rotation and longitudinal movement.
Stress relief for buried pipelines: Dissipates forces from soil settlement, thermal expansion, and seismic activity, eliminating the need for separate expansion devices.
Key Applications
Water Supply Networks
Main distribution lines
Branch connections
Sewage Systems
Wastewater transport
Product Parameters Table
|
Parameter |
Specification |
|
Product Name |
DI Socket Fittings with EX Joint |
|
Material |
Ductile Iron 500-7 |
|
Pressure Rating |
PN10-PN25 |
|
Joint Type |
EX Flexible Joint |
|
Size Range |
DN80 - DN1000 |
|
Deflection Angle |
Up to 5 degrees |
|
Coating |
Zinc-Aluminum + Bitumen |
|
Standards |
ISO 2531, EN 545 |
Scope
Compatible with potable water, raw water, treated effluent, and industrial water applications. Operating temperature range -10°C to 80°C based on elastomer selection.
Materials
Fitting body: Ductile iron grade EN-GJS-400-15 or EN-GJS-450-10 conforming to ISO 1083
Gasket: EPDM compound formulated for EX joint applications, meeting EN 681-1 requirements
Assembly lubricant: Water-based, non-toxic lubricant compatible with EPDM
Back-up rings (if applicable): Acetal or stainless steel for enhanced extrusion resistance
Installation Steps
Prepare trench properly. Check fitting condition. Clean socket and spigot. Apply lubricant evenly. Push components together. Check joint alignment. Test connection security.
Standards
Design and manufacturing: EN 545 (potable water) / EN 598 (sewage) / ISO 2531
Gasket specifications: EN 681-1 / ISO 4633
External coating: ISO 8179 / EN 14901
Internal lining: Cement mortar per ISO 4179 or epoxy per EN 14901
Testing protocol: EN 12266 / ISO 2531 Annex
Packaging Details
We use wooden crates. Protective caps cover joints. Cushioning prevents damage. Steel straps secure loads. Clear labels show handling.
After-Sales Service
We provide technical support. We offer installation guidance. We supply spare parts. We respond quickly. We solve problems fast.
Accessories & Optional Configurations
Pre-installed gaskets with extended shelf-life packaging for project staging
Mechanical restraint conversion kits for sections requiring axial fixation
Transition fittings combining EX joint with flange ends for valve or equipment connections
Polyurethane external coating for abrasion resistance in rocky trench conditions
Glass-reinforced epoxy internal lining for high-flow or low-friction applications
Heat-shrinkable sleeves for joint corrosion protection after field assembly
RFID tagging and digital tracking for large-scale pipeline projects
Performance Testing
Cyclic deflection testing: EX joints subjected to 1,000 cycles at maximum specified angular deflection to validate long-term sealing reliability
Combined movement testing: Simultaneous angular and axial displacement testing to simulate real-world pipeline stress conditions
Hydrostatic proof testing: Each fitting tested at 1.5 times nominal pressure in accordance with EN 545
Vacuum integrity testing: Negative pressure test to verify sealing under suction conditions
