SS Weld Neck Flange ANSI/GB/DIN Standard SS304/316L PN40
SS316 stainless steel
Product Features
1. Material: High-quality SS304 (AISI 304) / SS316L (AISI 316L) stainless steel, with SS316L offering superior resistance to chloride corrosion (for marine/chemical use). 2. Neck structure: Long, tapered neck reduces stress concentration at the weld, suitable for high-pressure (PN25-PN100) and high-temperature (-20℃~500℃) conditions. 3. Standard compliance: Manufactured per ANSI B16.5, GB/T 9115, DIN 2513 to ensure dimensional accuracy and compatibility with global high-pressure systems. 4. Welding advantage: Butt welding creates a permanent, leak-proof joint (safer than slip-on flanges for critical pipelines). 5. Surface treatment: Pickling passivation (standard) removes weld oxide; optional mirror polishing (Ra ≤ 0.8μm) for sanitary high-pressure lines (e.g., pharmaceutical).
Product Parameters
| Material | SS304 (AISI 304), SS316L (AISI 316L) |
| Type | Weld Neck (WN) |
| Pressure Rating | PN16, PN25, PN40, PN63, PN100 (Class 300, Class 600, Class 900 for ANSI) |
| Standards | ANSI B16.5, GB/T 9115-2020, DIN 2513, JIS B2220 |
| Working Temperature | -20℃ ~ 500℃ |
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