Superior Direction Change Solution
Ductile iron elbow fittings for directional changes in buried and above-ground pipelines. Available in multiple angles with push-on or flanged end connections.
Product Features
Ductile iron material resists corrosion. It handles high pressure effectively. 45° and 90° angles available. Different radius options. Long and short radius versions. Flanged ends optional. Cement lining inside. Zinc coating outside. Epoxy powder coating. Smooth bore design. Leak-proof connections. Simple installation process. Low maintenance needs. Cost-effective solution. Various sizes available. DN80 to DN1000 range.
Product Features
Multiple bend angles: Six standard angles from 11.25° to 90° allow gradual or sharp directional changes without custom fabrication.
Socket or flange options: Push-on socket ends for buried rapid installation, or flanged ends for above-ground bolted connections to equipment.
Smooth internal flow path: Full bore design with cement mortar lining minimizes friction loss and prevents sediment accumulation at the bend.
Constant wall thickness: Uniform wall thickness through the bend radius maintains full pressure rating without weak points.
Factory applied lining: Centrifugal cement mortar lining applied before bending, ensuring complete coverage without cracks at the intrados.
Joint flexibility: Push-on socket version allows up to 3° to 5° angular deflection per joint, accommodating alignment variations.
External corrosion protection: Zinc plus epoxy coating per ISO 8179, or fusion bonded epoxy for aggressive soil conditions.
Key Technical Specifications
| Item | Specification |
|---|---|
| Product Type | Ductile Iron Elbow Fittings |
| Bend Angles | 11.25° / 22.5° / 30° / 45° / 60° / 90° |
| Nominal Size | DN50 – DN2000 |
| Pressure Rating | PN10 / PN16 / PN25 / Class 150 |
| Connection Types | Push-on socket / Flanged ends / Self-anchoring socket |
| Standard | EN 545 / EN 598 / ISO 2531 |
Application
Pipeline route changes around obstacles (buildings, rock formations, existing utilities)
Vertical drops in pump station suction and discharge piping
River and road crossing approaches
Valve and hydrant lateral connections
Plant pipe rack directional changes
Trenchless installation pullback sections
Quality Control
Raw material testing
Dimension verification
Pressure testing
Coating thickness check
Lining quality inspection
Visual examination
Performance testing
Certification provision
Materials
Elbow body: Ductile iron EN-GJS-400-15 / EN-GJS-450-10 (ASTM A536)
Gasket (for socket ends): EPDM (drinking water approved) per EN 681-1
Internal lining: Cement mortar to ISO 4179 (Type M or Type T)
External coating: Zinc (130–200 g/m²) + epoxy topcoat to ISO 8179
Flange gasket (for flanged ends): Full face EPDM 3 mm thick
Standards
Product dimensions: EN 545 / EN 598 / ISO 2531
Face-to-face dimensions: EN 558 (for flanged elbows)
Socket dimensions: ISO 2531 / EN 545
Lining: ISO 4179
Coating: ISO 8179-1 / ISO 8179-2
Testing: EN 12266 / ISO 2531
Packaging Information
Plastic end caps
Foam protection
Steel strip bundling
Wooden pallet base
Weather-proof cover
Clear labels
Manual included
Certificate copy
Service Support
18-month warranty
Technical guidance
Spare parts supply
Installation support
Emergency response
Feedback collection
Certification Standards
ISO 9001 certified
ISO 2531 compliant
EN 545 standard
Third-party inspection
Quality certificates
Performance Testing
Hydrostatic pressure test: Each elbow tested at 1.5 times rated pressure per EN 12266
Lining integrity test: Cement mortar inspected for cracks, especially at bend intrados (inner curve)
Coating holiday detection: 100 percent spark testing at 1,500 volts for external epoxy
Dimensional check: Center-to-end dimensions and socket bore verified per ISO 2531
Gasket groove inspection: Socket internal groove checked for smooth finish and correct profile
Material verification: Spectrographic analysis per EN 1563 for ductile iron grade
Third-party inspection: Available through SGS, Bureau Veritas, or customer nominated
Accessories
11.25°, 22.5°, 30°, 45°, 60° bend angles for gradual direction changes
Flanged version for above-ground or plant installation
Self-anchoring socket version with stainless steel locking rings for thrust restraint
Double socket elbow (socket both ends) for pipe-to-pipe connections
Double flange elbow (flanged both ends) for bolted connections
Flanged by socket elbow for transition between connection types
Special internal lining: High-build epoxy for aggressive fluids or reduced friction
