Description
Ductile iron loose flange fittings engineered for flexible pipeline connections in water supply, sewage treatment, and industrial systems. Designed to simplify on-site alignment and reduce installation stress.
Product Features
Loose flange design allows free rotation for easy bolt hole alignment, significantly simplifying installation in tight or confined spaces.
Manufactured from high-strength ductile iron offering excellent mechanical properties and impact resistance under pressure.
Compatible with various pipe materials including ductile iron, steel, PVC, and GRP, providing versatile application flexibility.
Corrosion-resistant coating options such as fusion-bonded epoxy or liquid epoxy ensure long service life in water and wastewater environments.
Technical Specifications
|
Parameter |
Specification |
|
Product Name |
DI Loosening Flange Fittings |
|
Size Range |
DN50 - DN1000 |
|
Material |
Ductile Iron 500-7 |
|
Pressure Class |
PN10/16/25 |
|
Flange Type |
Loosening Plate Type |
|
Coating |
Epoxy, Galvanized |
|
Standards |
ISO 7005, ISO 2531 |
Application
Municipal drinking water transmission and distribution networks
Wastewater collection and treatment facilities
Industrial cooling water systems
Fire protection pipeline systems
Pumping stations and valve interconnection points
Temporary pipeline installations requiring frequent disassembly
Production Process
We use quality ductile iron. Apply advanced casting technology. Perform precision machining. Install protective linings carefully. Add corrosion coatings. Conduct pressure tests. Do final inspections.
Media Compatibility
Suitable for water, potable water, wastewater, raw water, and non-aggressive industrial fluids within the designated pressure and temperature ranges.
Materials
Flange Body: Ductile Iron (EN GJS-400-15 / ASTM A536 60-40-18)
Backing Flange: Ductile Iron or Carbon Steel (optional)
Coating: Fusion-bonded epoxy (min. 250 microns) conforming to drinking water hygiene standards
Gasket Material: EPDM, NBR, or fiber-reinforced rubber (supplied as required)
Standards
Design and dimensions: EN 1092-2, ISO 7005-2
Material grade: EN 1563 / ISO 1083
Coating: DIN 30675 / EN 14901
Pressure testing: EN 12266-1
Accessories & Optional Configurations
Pre-assembled gaskets (EPDM, NBR, Viton) matched to service medium
Stainless steel bolts, nuts, and washers for complete flange connection kits
Special coatings for aggressive soil conditions or high-chemical environments
Insulating flange kits for cathodic protection applications
Oversized or custom-drilled bolt patterns to match non-standard mating flanges
After-sales Service
Provide 18-month warranty
Offer technical support
Supply spare parts
Give installation advice
Respond promptly
Solve problems quickly
Accept feedback
Why Choose Our Product
DI Loosing Flange Fittings ensure easy maintenance. They provide installation flexibility. These products meet quality standards. Professionals choose DI Loosing Flange Fittings for reliability.
Final Recommendation
Choose our DI Loosing Flange Fittings today. Improve your pipeline system. Contact us now for details.
Performance Testing
Full dimensional inspection conducted on each production batch to ensure interchangeability with standard mating flanges.
Coating thickness and adhesion testing performed to verify corrosion protection integrity.
Hydrostatic pressure testing available upon request for assembled fitting and flange combinations.
Material test reports provided, including chemical composition and mechanical property verification.
Factory quality management system complies with ISO 9001 standards.
All components are traceable by heat number, with inspection documentation maintained for quality records.
