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AWWA-C219 Ductile iron 50mm Double Flange Dismantling Joint with Tie Rods for Pumping Stations
- Size: DN40-DN2000
- Pressure Ratings: PN10, PN16, PN25, PN40
- Connections: Flange
- Temperature Range: -10°C~+70°C
- Body Material: Ductile iron, Carbon steel
- Medium: Air, Water
- Design Standard: AWWA-C219
- Applications: Pumping stations, Water treatment plants, Sewage treatment plants, Plant rooms, Instrument rooms, Power generation equipment, gas stations etc.
Role in Valve Installation and Pipeline Maintenance
Dismantling joints are essential components in water transmission and wastewater pipeline systems, particularly where large-diameter valves are installed. Their primary function is to provide axial adjustment during installation and to create sufficient clearance for valve removal during maintenance.
In practical pipeline projects, dismantling joints help compensate for dimensional tolerances and simplify on-site alignment, reducing installation difficulty and labor intensity.
Application with Large-Diameter Valves
Dismantling joints are commonly installed together with butterfly valves, gate valves, and swing check valves in water pipeline systems. When used in combination with double eccentric butterfly valves, dismantling joints significantly improve installation efficiency and maintenance accessibility.
This combination allows valves to be removed without disturbing adjacent pipe sections, reducing maintenance time and minimizing operational disruption.
| NO | Name | Material | Standard |
| 1 | Fixde Flange | GGG50 | EN1563 |
| 2 | Gasket | EPDM | ISO 4633 |
| 3 | Gland | GGG50 | EN1563 |
| 4 | Removable Fange | GGG50 | EN1563 |
| 5/6/7 | Bolt | Carbon Steel Grade 4.8 | ISO 898 |
| Epoxy Coating | Epoxy Poeder | BS EN 14901 | |
| Flange Driling | ISO 2531,BS EN 545,BS EN 1092 |
Engineering Benefits in Water Pipeline Systems
From an engineering perspective, the use of dismantling joints contributes to:
- Improved installation flexibility
- Reduced mechanical stress on valves and flanged connections
- Shorter maintenance downtime
- Enhanced safety during valve handling and replacement
For long-distance water transmission pipelines and underground valve chambers, dismantling joints are considered a standard and practical solution.
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