Certification: BS EN
Standard: EN 10242 / ASME B16.3
Material: Malleable iron
Surface treatment: Electro-galvanized / Hot-dip galvanized / Black
Working pressure: 1.6MPa～2.5MPa
Temperature range: -20℃～200℃
Thread standard: BSPT / NPT
Applicable media: Water, hot water, oil, gas, steam, fire water, etc.
Malleable iron flange with holes is a crucial component in various industrial, commercial, and residential applications.
This product is a malleable iron threaded Flange Fig 321 BSPTwith holes, manufactured in accordance with BS EN standards. It is used for rigid connection between pipelines and valves, equipment, pumps, etc., achieving stable sealing through bolt fastening, widely used in water, oil, gas, steam and fire protection piping systems.
Made of high-quality malleable iron with high-temperature annealing, it features compact structure, good toughness, shock resistance and not easy to crack. With high-precision threads for tight fitting, flat Flange Fig 321 BSPTface and evenly distributed bolt holes, it ensures firm and reliable installation. Available in galvanized or black finish with good corrosion resistance and long service life.
Sizes range from DN15(1/2″) to DN100(4″), suitable for fire fighting, water supply & drainage, HVAC, industrial pipelines and other applications.
| SIZE | A (MM) | B (MM) | PCS/CTN. | |
| 1 1/4” | DN32 | 24 | 105 | 20 |
| 1 1/2” | DN40 | 26 | 115 | 20 |
| 2” | DN50 | 29 | 125 | 16 |
| 2 1/2” | DN65 | 33 | 145 | 12 |
| 3” | DN80 | 34 | 160 | 8 |
| 4” | DN100 | 39 | 180 | 8 |
| 6” | DN150 | 42 | 240 | 4 |
Fire fighting systems: Connection between pipes and fire pumps, wet alarm valves, fire hydrant equipment
Water supply & drainage: Connection of main/riser pipes to valves, water meters, filters
HVAC & hot water systems: Inlet/outlet connection for boilers, heat exchangers, circulation pumps
Industrial pipelines: Compressed air, oil, low-pressure steam pipeline connections
Gas & utility projects: Municipal pipe network, factory pipeline fixed connection
Compatibility:
Matching with galvanized steel pipes, malleable iron fittings, valve flanges, equipment ports
Used with Flange Fig 321 BSPTgaskets, bolts and nuts for sealing connection
Installation Guide:
Inspect Flange Fig 321 BSPTfor sand holes, cracks, intact threads and face
Wrap PTFE tape or apply sealant on male pipe thread, then screw into flange
Align mating Flange Fig 321 BSPTand install sealing gasket
Tighten bolts symmetrically and evenly to avoid deflection and leakage
Maintenance Tips:
Regularly check Flange Fig 321 BSPTjoints for leakage, looseness and corrosion
Touch up with anti-rust paint for outdoor or humid environments
Replace immediately if deformation, cracks or serious corrosion occurs
OEM is available. We can customize the product according to your specific requirements, including logo printing and packaging design.
The MOQ is 500 pieces. For customized products with special sizes or surface treatments, the MOQ may vary.
After order confirmation and receipt of the advance payment, we will arrange production. Generally, the products can be ready for shipment within 15-20 working days. Once dispatched, we will notify you and provide all necessary documents for customs clearance.
All products are 100% new and undergo strict quality inspections, including pressure testing and dimensional checks, before delivery. We use sturdy wooden crates or cartons to ensure the products are well-protected during transportation.
Yes, we provide detailed installation instructions in English and other major languages. Our technical support team is also available for online consultation and guidance if needed.
Sales Inquiry:
Provide contact information for sales inquiries.
Email: [email protected]
Phone: +86 13012223295
If you have any questions regarding product installation, commissioning, operation or maintenance, please contact our technical support team for professional assistance:
Email: [email protected]
