Professional Flange Casting Manufacturer for SMEs
As a specialized flange casting manufacturer in Ningbo, China, DingZhu produces custom pipe flanges, valve flanges, and connection flanges for various industries. Our cast flanges meet ANSI, DIN, and JIS standards with full material certification and dimensional inspection.
With 20+ years of foundry experience and ISO9001 certification, we provide cost-effective solutions without compromising quality. Minimum order quantity starts from just 10 pieces, perfect for prototypes or small production runs.
Technical Specifications
Materials Available
Carbon Steel (WCB, WCC), Ductile Iron (QT450-10), Stainless Steel (CF8, CF8M)
Casting Capabilities
- Weight Range: 0.5kg - 100kg
- Casting Process: Sand Casting, Shell Mold Casting
- Tolerance: CT9-CT12 (ISO 8062)
Additional Services
Machining
CNC milling, turning, drilling, tapping
Heat Treatment
Annealing, normalizing, quenching
Surface Treatment
Painting, powder coating, galvanizing
Common Applications
Pipe Flanges
Slip-on, weld neck, and blind flanges for piping systems. ANSI B16.5 and DIN standards.
Valve Flanges
Connection flanges for ball valves, gate valves, and butterfly valves. Custom bolt patterns available.
Pump Flanges
Suction and discharge flanges for centrifugal pumps. Precision-machined sealing surfaces.