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Cast Iron Flange
QS Flange: Cast Iron Flange
Name: Cast Iron Flange
Material: Ductile Iron
Standard: ASME B16.42
Pressure: 150LB/ 300LB
Size: 1/2 to 24 Inch
Process Method: Casting
Surface: Black
Face: FF
Usage: Used in Water treatment systems, HVAC, Petrochemicals and Construction industries, etc
Material: Ductile Iron
Standard: ASME B16.42
Pressure: 150LB/ 300LB
Size: 1/2 to 24 Inch
Process Method: Casting
Surface: Black
Face: FF
Usage: Used in Water treatment systems, HVAC, Petrochemicals and Construction industries, etc
Quantity
Cast Iron Flange is manufactured from high-quality ductile iron material, compliant with ASME B16.42 standard, and suitable for Class 150 and Class 300 pressure rating pipeline systems. With an extensive size range (1/2"to 24"), Cast Iron Flange meets diverse application requirements in water treatment, HVAC, petrochemical, and construction industries.
1. Outside Diameter (OD)
The OD of Cast Iron Flange varies by NPS and pressure class. Standard dimensions include:
The OD of Cast Iron Flange varies by NPS and pressure class. Standard dimensions include:
| NPS | DN | Class 150 OD (mm) | Class 300 OD (mm) |
| 1/2" | 15 | 89 | 95 |
| 1" | 25 | 102 | 108 |
| 4" | 100 | 229 | 235 |
| 8" | 200 | 343 | 351 |
| 16" | 400 | 597 | 603 |
| 24" | 600 | 813 | 819 |
2. Bolt Circle Diameter (BCD)
The BCD of Cast Iron Flange ensures precise alignment for flange connections:
The BCD of Cast Iron Flange ensures precise alignment for flange connections:
| NPS | Class 150 BCD (mm) | Class 300 BCD (mm) |
| 1/2" | 60.3 | 66.7 |
| 1" | 66.7 | 73.0 |
| 4" | 152.4 | 158.8 |
| 8" | 241.3 | 247.6 |
| 16" | 393.7 | 400.0 |
| 24" | 571.5 | 577.8 |
3. Bolt Hole Quantity & Diameter
Cast Iron Flange bolt hole design balances strength and sealing performance:
Cast Iron Flange bolt hole design balances strength and sealing performance:
| NPS | Class 150 Qty | Class 150 Dia (mm) | Class 300 Qty | Class 300 Dia (mm) |
| 1/2" | 4 | 15.9 | 4 | 15.9 |
| 1" | 4 | 15.9 | 4 | 15.9 |
| 4" | 8 | 19.0 | 8 | 19.0 |
| 8" | 8 | 22.2 | 12 | 25.4 |
| 16" | 16 | 28.6 | 20 | 31.8 |
| 24" | 20 | 34.9 | 24 | 38.1 |
4. Flange Thickness
Cast Iron Flange thickness is optimized for pressure resistance:
Cast Iron Flange thickness is optimized for pressure resistance:
| NPS | Class 150 Thk (mm) | Class 300 Thk (mm) |
| 1/2" | 11.1 | 14.3 |
| 1" | 12.7 | 15.9 |
| 4" | 19.0 | 22.2 |
| 8" | 25.4 | 28.6 |
| 16" | 31.8 | 34.9 |
| 24" | 38.1 | 41.3 |
5. Applications & Advantages
Cast Iron Flange features cast manufacturing, black painted surface, and flat face (FF) design for superior sealing and durability. Its high strength and corrosion resistance make it ideal for industrial piping systems, especially in high-pressure and highly corrosive environments.
Cast Iron Flange features cast manufacturing, black painted surface, and flat face (FF) design for superior sealing and durability. Its high strength and corrosion resistance make it ideal for industrial piping systems, especially in high-pressure and highly corrosive environments.
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