Flange Adapter

1. Material and Manufacturing
Core Material Composition:
Ductile Iron Body: EN-GJS-500-7 with spheroidal graphite microstructure
Stainless Steel Components: SS304/316 retaining bolts and nuts
Sealing Elements: EPDM gaskets (standard), NBR or Viton for special applications
Corrosion Protection: Fusion-bonded epoxy coating per AWWA C116

Manufacturing Process:
Precision sand casting with controlled metallurgy
CNC machining of flange faces and spigot ends
Automated gasket seating and component assembly
Individual pressure testing at 2.5× rated working pressure

2. Performance Characteristics
Mechanical Performance:
Pressure rating: PN10/16/25 (150–365 psi)
Temperature range: -20°C to 120°C (with EPDM gaskets)
Axial restraint capability: Withstands 1.5× maximum pressure thrust
Burst pressure: ≥4× working pressure
Allowable angular deflection: Up to 5°

Sealing Performance:
Dual-seal mechanism:

• Primary seal: Rubber gasket compression on the spigot end

• Secondary seal: Flange gasket compression
  Zero leakage performance per AWWA C111 standards
  Maintains seal integrity under ground settlement and vibration

Installation Performance:
Combines push-on simplicity with flanged connection versatility
No welding or special tools required
Visual alignment indicators ensure accurate installation
Immediate system pressurization after assembly

3. Utility and Applications
Primary Application Domains:
Pipe-to-Valve Connections: Transitions between pipes and flanged valves
Pipe-to-Pump Connections: Connects pipes to flanged pump inlets/outlets
System Modifications: Retrofit and repair operations
Material Transitions: Connects different pipe materials

Installation Advantages:
Time Efficiency: 70% faster installation than traditional flanged connections
Space Optimization: Compact design minimizes clearance requirements
Alignment Tolerance: Accommodates minor misalignments
Weather Independence: Suitable for all-weather installation

Economic Benefits:
Cost Reduction: 40–60% lower installed cost than conventional flanged joints
Labor Savings: Reduced crew size and shorter installation time
Inventory Optimization: One component replaces multiple parts
Maintenance Efficiency: Simple disassembly and reassembly

Technical Superiority:
Vibration Absorption: Rubber gasket dampens system vibrations
Thermal Compensation: Accommodates expansion and contraction
Corrosion Resistance: Full epoxy coating protection
Electrolytic Isolation: Prevents galvanic corrosion between dissimilar metals

Design Features
Innovative Configuration:

• Flange end: Drilled to ANSI B16.1 dimensions

• Socket end: T-type push-on joint configuration

• Restraint mechanism: Integral locking segments or bolts

• Gasket system: Pressure-activated sealing design

Protection Systems:

• Cement mortar lining per AWWA C104

• External epoxy coating per AWWA C116

• Dielectric isolation gasket option

• UV-resistant coating for exposed applications

Comparative Advantages

Installation Benefits:
Field Efficiency:
No field welding or pipe-end preparation required
Simple bolt tightening operation
Immediate pressure testing capability

Reliability Features:
Visual installation indicators
Positive stop prevents over-insertion
Uniform gasket compression
Corrosion-resistant fasteners

Quality Assurance:
Third-party certification (NSF, UL, FM)
Full material traceability
Regular ISO 9001 quality audits
Performance testing per AWWA standards

Conclusion:
Ductile Iron Flange Adapters combine the quick installation of push-on joints with the versatility of flanged systems. Their robust, corrosion-resistant construction provides a cost-effective and reliable solution for connecting diverse piping components while maintaining full pressure capability. Offering reduced installation time, labor efficiency, and superior sealing reliability, these adapters are an essential component in modern water and industrial pipeline systems.