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Ningbo EN10222-5 1.4404 WN Flange
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Name: Ningbo EN10222-5 1.4404 WN Flange
Face: RF
Size: 6 Inch
Class: 300LB
Process Method: Forged
Material: F316L
Type: WN
Feature: Strong Stiffness, Good Sealing, Corrosion Resistance
Usage: High Temperature, High Pressure and High Sealing Requirements
Face: RF
Size: 6 Inch
Class: 300LB
Process Method: Forged
Material: F316L
Type: WN
Feature: Strong Stiffness, Good Sealing, Corrosion Resistance
Usage: High Temperature, High Pressure and High Sealing Requirements
Quantity
The EN10222-5 1.4404 WN Flange (Weld Neck) is a high-integrity pressure-containing component engineered for critical service conditions. Manufactured in Ningbo under strict EN10222-5 certification, this 6-inch, Class 300LB raised-face (RF) flange is produced from 1.4404 (equivalent to AISI F316L) low-carbon austenitic stainless steel via an advanced open-die forging process. The combination of molybdenum-bearing chemistry and solution-annealed microstructure delivers superior resistance to pitting, crevice corrosion, and intergranular attack—even in chloride-laden environments.
Technical Specifications & Compliance
- Standard & Material: EN10222-5 / 1.4404 (F316L)
- Type: Weld Neck (WN) with raised face (RF) per EN 1092-1 or ASME B16.5 (customizable)
- Dimensions: 6 Inch (DN150) | Pressure Class: 300LB (PN50)
- Process: Hot-forged with controlled grain flow, followed by solution annealing (1050°C ± 10°C) and water quenching to ensure optimal austenitic structure.
- Non-Destructive Testing (NDT): 100% visual inspection, dye penetrant (PT) per EN 10228-2, and ultrasonic testing (UT) per EN 10228-3 to guarantee zero defects in the hub and weld zone.
- Standard & Material: EN10222-5 / 1.4404 (F316L)
- Type: Weld Neck (WN) with raised face (RF) per EN 1092-1 or ASME B16.5 (customizable)
- Dimensions: 6 Inch (DN150) | Pressure Class: 300LB (PN50)
- Process: Hot-forged with controlled grain flow, followed by solution annealing (1050°C ± 10°C) and water quenching to ensure optimal austenitic structure.
- Non-Destructive Testing (NDT): 100% visual inspection, dye penetrant (PT) per EN 10228-2, and ultrasonic testing (UT) per EN 10228-3 to guarantee zero defects in the hub and weld zone.
Key Engineering Features
- Strong Stiffness: The tapered weld neck geometry minimizes stress concentration at the hub-to-pipe junction, providing exceptional mechanical rigidity under cyclic loading.
- Superior Sealing: The precision-machined RF surface (Ra 3.2–6.3 µm) ensures consistent gasket compression, achieving leak-tight performance even with spiral-wound or PTFE envelope gaskets.
- Corrosion Resistance: The 2.5–3.0% Mo content in 1.4404 offers outstanding resistance against sulfuric, phosphoric, and organic acids, far surpassing 304L grades in marine and chemical service.
- Strong Stiffness: The tapered weld neck geometry minimizes stress concentration at the hub-to-pipe junction, providing exceptional mechanical rigidity under cyclic loading.
- Superior Sealing: The precision-machined RF surface (Ra 3.2–6.3 µm) ensures consistent gasket compression, achieving leak-tight performance even with spiral-wound or PTFE envelope gaskets.
- Corrosion Resistance: The 2.5–3.0% Mo content in 1.4404 offers outstanding resistance against sulfuric, phosphoric, and organic acids, far surpassing 304L grades in marine and chemical service.
Application Scenarios
This EN10222-5 1.4404 WN Flange is the preferred choice for:
- Petrochemical refineries: High-temperature transfer lines (up to 450°C in oxidizing media) and sour-water service.
- Offshore platforms: Seawater cooling systems and firewater mains where chloride stress-corrosion cracking is a concern.
- Pharmaceutical & food processing: Sanitary steam lines requiring inert, easily cleanable surfaces.
- Power generation: Superheated steam piping in combined-cycle plants.
This EN10222-5 1.4404 WN Flange is the preferred choice for:
- Petrochemical refineries: High-temperature transfer lines (up to 450°C in oxidizing media) and sour-water service.
- Offshore platforms: Seawater cooling systems and firewater mains where chloride stress-corrosion cracking is a concern.
- Pharmaceutical & food processing: Sanitary steam lines requiring inert, easily cleanable surfaces.
- Power generation: Superheated steam piping in combined-cycle plants.
Quality Assurance & Marking
Each forged flange is permanently laser-engraved with size, class, material (1.4404), heat number, and manufacturer’s trademark—ensuring full traceability to the mill certificate (EN 10204 3.1). The forging reduction ratio exceeds 3:1, guaranteeing uniform mechanical properties (yield ≥ 220 MPa, tensile ≥ 500 MPa) across the entire cross-section.
Each forged flange is permanently laser-engraved with size, class, material (1.4404), heat number, and manufacturer’s trademark—ensuring full traceability to the mill certificate (EN 10204 3.1). The forging reduction ratio exceeds 3:1, guaranteeing uniform mechanical properties (yield ≥ 220 MPa, tensile ≥ 500 MPa) across the entire cross-section.
Why Specify This Flange?
By choosing this 6-inch 300LB EN10222-5 1.4404 WN Flange, you eliminate premature gasket failures and weld cracking risks inherent in cast or lower-grade alternatives. Its robust design withstands pressures up to 5.0 MPa at 50°C (derated per ASME B16.5) and thermal shocks from -100°C to +400°C. For mission-critical connections where downtime is unacceptable, this forged F316L flange offers a lifecycle cost advantage of 30–40% over inferior products.
By choosing this 6-inch 300LB EN10222-5 1.4404 WN Flange, you eliminate premature gasket failures and weld cracking risks inherent in cast or lower-grade alternatives. Its robust design withstands pressures up to 5.0 MPa at 50°C (derated per ASME B16.5) and thermal shocks from -100°C to +400°C. For mission-critical connections where downtime is unacceptable, this forged F316L flange offers a lifecycle cost advantage of 30–40% over inferior products.
Trust in Ningbo’s precision engineering—every piece is hydrostatically tested per EN 1092-1 requirements before dispatch. Contact our technical team for custom hub lengths or special facing finishes.
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