ASME B16.47 Series B WNRF Flange – Stainless Steel 316/316L Class 150
ASME B16.47 Series B WNRF Flange – Stainless Steel 316/316L Class 150
SSM supplies ASME B16.47 Series B Weld Neck Raised Face (WNRF) Flanges in 30-inch, Class 150, manufactured from forged stainless steel SA182 F316/316L. These flanges are designed for large-diameter, high-pressure piping systems requiring excellent corrosion resistance, strength, and durability.
🔹 Product Overview
The Weld Neck Raised Face (WNRF) design provides high structural integrity and leak-free performance under varying temperature and pressure. Stainless Steel 316/316L ensures excellent corrosion resistance, especially against chlorides and acidic environments, making it ideal for chemical, petrochemical, marine, and water treatment applications.
🔹 Chemical Composition (Typical, %)
| Element | C | Mn | Si | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| 316 | ≤0.08 | ≤2.00 | ≤1.00 | ≤0.045 | ≤0.03 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| 316L | ≤0.03 | ≤2.00 | ≤1.00 | ≤0.045 | ≤0.03 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
316L has lower carbon content, which minimizes carbide precipitation during welding and enhances corrosion resistance.
🔹 Mechanical Properties
| Property | 316 | 316L |
|---|---|---|
| Tensile Strength (MPa) | ≥515 | ≥485 |
| Yield Strength (MPa) | ≥205 | ≥170 |
| Elongation (%) | ≥40 | ≥40 |
| Hardness (HB) | ≤217 | ≤217 |
These properties ensure the flange performs reliably under high stress and thermal fluctuation conditions.
🔹 Manufacturing Process
Material Forging: High-quality stainless steel billets forged to achieve superior grain structure.
Heat Treatment: Solution annealing to improve ductility and corrosion resistance.
CNC Machining: Precision machining ensures accurate dimensions and smooth sealing surfaces.
Surface Finish: Polished or shot-blasted surfaces for improved aesthetics and durability.
Inspection: 100% visual, dimensional, and NDT (UT/RT) tests per ASME standards.
🔹 SSM Advantages
✅ Over 30 years of experience in flange manufacturing.
✅ Strict compliance with ASME, ASTM, EN, and ISO standards.
✅ Advanced CNC and forging facilities ensure high dimensional accuracy.
✅ Complete quality assurance with MTC (EN 10204 3.1 / 3.2).
✅ Global supply capability for customized sizes and materials.
🔹 Applications
Oil & Gas pipelines
Chemical and petrochemical plants
Desalination and water treatment systems
Marine and offshore platforms
Power generation piping systems
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