This is a high-specification industrial component designed for extreme pressure and corrosive environments. Below is a professional product introduction formatted for a technical catalog or a high-end commercial proposal.
8" Sch60 Weld Neck Flange | Class 600
ASTM A182 F316/316L Dual Grade | ASME B16.5 | RF | NACE MR0175
This 8-inch Weld Neck Flange (WNF) is engineered for high-pressure piping systems where structural integrity and leak prevention are critical. Featuring a long tapered hub, it provides vital reinforcement for applications involving high pressure, sub-zero temperatures, or extreme heat.
1. Key Technical Specifications
| Specification | Details |
| Size / NPS | 8" (DN200) |
| Pressure Class | Class 600 (approx. 100 bar / 1480 psi at ambient) |
| Flange Type | Weld Neck (WNF) |
| Bore / Schedule | Schedule 60 (Matches 8" Sch60 pipe ID) |
| Facing | Raised Face (RF) |
| Material Standard | ASTM A182 F316/316L (Dual Certified) |
| Dimensional Standard | ASME B16.5 |
| Compliance | NACE MR0175 / ISO 15156 (Sour Service) |
2. Material Advantages: F316/316L Dual Grade
By combining the properties of both 316 and 316L, this flange offers the best of both worlds:
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Corrosion Resistance: The addition of Molybdenum provides excellent resistance to chlorides and pitting, superior to Grade 304.
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Low Carbon (316L): Prevents carbide precipitation during the welding of the heavy 8" Sch60 neck, ensuring the heat-affected zone remains corrosion-resistant.
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High Strength (316): Meets the higher mechanical strength requirements of standard 316, making it ideal for Class 600 pressure ratings.
3. Engineering Highlights
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Superior Stress Distribution: The tapered hub transfers stress from the flange to the pipe, reducing stress concentration at the base of the flange.
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NACE MR0175 Compliance: Specifically tested and certified for "Sour Service" (H2S environments), preventing sulfide stress cracking.
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Precision Bore (Sch60): The bore is machined to match the Schedule 60 pipe wall thickness exactly, ensuring smooth fluid flow and minimal turbulence/erosion at the joint.
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Forged Construction: Forged at high temperatures to ensure a refined grain structure, offering significantly higher impact and fatigue resistance than cast alternatives.
4. Primary Applications
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Oil & Gas: High-pressure offshore platforms and sour gas processing plants.
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Petrochemical: Refining processes involving corrosive chemicals at high temperatures.
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Power Generation: High-pressure steam lines and feedwater systems.
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Heavy Industrial: Specialized hydraulic and high-pressure fluid transfer.
5. Quality & Documentation
Every flange undergoes rigorous quality control to meet global safety standards:
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Full Traceability: Heat number stamped on the flange rim.
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Certification: EN 10204 3.1 Mill Test Certificate (MTC) included.
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Testing: Ultrasonic Testing (UT), Positive Material Identification (PMI), and NACE-compliant hardness testing.
Would you like me to prepare a "Technical Data Sheet" for this specific item?
I can include the exact dimensions (Outer Diameter, Bolt Circle, Hub Height) and the specific chemical composition limits for F316/316L. Would that be helpful for your technical submittal?
