Alloy steel flanges are critical components used to connect pipes, valves, pumps, and equipment in high-pressure, high-temperature, and corrosive service conditions. They are widely applied in oil & gas, petrochemical, power generation, marine, and chemical processing industries. As an experienced Chinese alloy flange manufacturer and exporter, we provide reliable quality, precise machining, and cost-effective solutions for global customers.
High Strength & Pressure Resistance
Manufactured from premium alloy materials, alloy steel flanges offer excellent mechanical strength and structural integrity, ensuring safe performance under high pressure and cyclic loads.
Excellent Corrosion & Temperature Resistance
Available in corrosion-resistant grades such as Duplex Steel, Super Stainless Steel, Nickel Alloy, Inconel, Hastelloy, and Monel, suitable for aggressive media and extreme temperatures.
Precision Machining & Tight Tolerances
CNC machining ensures accurate dimensions, flat sealing surfaces, and reliable gasket performance, reducing leakage risk during long-term operation.
Wide Standard & Custom Options
Supports ASME, ASTM, EN, DIN, JIS standards, with customized sizes, pressure classes, and special project requirements.
Stable material sourcing and large production capacity
Short lead time for standard flanges
Custom machining for drawings and non-standard flanges
Competitive export pricing
| Material |
Key Properties |
Typical Applications |
| ASTM A182 F11 / F22 |
High-temperature and pressure resistance |
Power plants, boilers, pipelines |
| Duplex Steel 2205 / 2507 |
High strength & corrosion resistance |
Offshore, seawater, oil & gas |
| Inconel 625 |
Excellent high-temp & corrosion resistance |
Chemical, aerospace |
| Hastelloy C-276 |
Exceptional resistance to strong acids |
Chemical reactors, scrubbers |
| Monel 400 |
Superior seawater corrosion resistance |
Marine piping systems |
| Nickel Alloy Flanges |
Heat & corrosion resistant |
Petrochemical, energy |
| Super Stainless Steel |
Enhanced corrosion resistance |
Chemical & offshore equipment |
Why Global Buyers Choose Our Alloy Steel Flanges
Reliable Quality Assurance
Each flange is supplied with MTC (EN 10204 3.1 / 3.2) and optional third-party inspection (SGS, BV, TUV).
Flexible Customization Capability
Support for customized OD, ID, thickness, drilling, sealing surface (RF, FF, RTJ), and pressure class.
Fast & Flexible Logistics
Sea freight, air shipment, and mixed-container loading supported for urgent project requirements.
Strong Cost Advantage
China’s mature alloy steel manufacturing ecosystem enables us to deliver high-quality alloy flanges at competitive factory-direct prices.
Conclusion
With strong manufacturing capability, strict quality control, and efficient global delivery, Chinese alloy steel flanges continue to serve critical piping systems worldwide. We welcome global partners and EPC contractors to cooperate with us for reliable, long-term alloy flange solutions.
