GB/T9113 F310S PN20 RF Welding Neck Flange is high chromium nickel heat-resistant forged butt weld flange, exclusive customized for boiler, flue gas, high-temperature steam thermal piping. Unique industry advantages: 1050℃ high temperature oxidation resistance, thermal fatigue resistance, low expansion coefficient anti-deformation, high-temperature sealing stability, high strength under constant high heat, solve ordinary stainless steel flange high-temperature softening, oxidation cracking, seal failure defects.
High Cr-Ni alloy formula upgrades high-temperature performance, continuous working temperature up to 1050℃, no surface oxidation peeling under long-term high-heat flue gas erosion. Low thermal expansion coefficient, the flange size keeps stable during heating and cooling cycle, avoid bolt loosening and gasket leakage caused by thermal expansion deformation. Reinforced arc neck uniform heat dissipation, reduce local high-temperature stress concentration.
Precision lapped sealing face keep flatness under high temperature, matched with high-temperature graphite gasket, permanent anti-leakage for steam flue pipe. Full penetration high-temperature welding bevel, weld joint not easy brittle failure. PN20 2.0MPa high-temperature working pressure. DN20-DN500 high-temp size in stock. Factory custom high-temp surface treatment, special alloy adjustment. Passed high-temperature endurance test. 18-month high-heat working warranty, complete high-temperature material test report provided.
Core Product Advantages:1.1050℃ high temperature oxidation resistant;2.Low expansion anti-thermal deformation;3.Arc neck heat dissipation uniform;4.High-temp stable sealing;5.Anti-brittle weld under constant heat
Core Spec: Standard: GB/T9113; Pressure: PN20; Face: RF; Material: F310S Cr-Ni Heat-resistant Stainless Steel; Process: Alloy Forged + High-temp Stabilization; Size: DN20-DN500
FAQ: Q: Can 304 flange replace F310S for flue pipe?
A: No, 304 will oxidize and crack above 550℃ high temperature.
