PN16 DN20 Weld Neck Flange
PN16 DN20 weld-neck flange (AISI 304 stainless steel), made to EN 1092-1. Butt-weld hub geometry for high-integrity bolted joints on pressurised process and utility lines. Quoted and sold per piece.
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Applications & Usage
Used on critical process, steam, and cyclic-load lines where a butt-weld hub improves stress distribution at the flange joint.
Technical Specifications
| Specification | Value |
|---|---|
| Nominal size | DN20 |
| Pressure class | PN16 |
| Material | Stainless Steel |
| Alloy/Grade | AISI 304 |
| Standard | EN 1092-1 |
| D (OD) | 105 mm |
| K (PCD) | 75 mm |
| Bolt | 4 × M12 |
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Technical guides
304 vs 316 stainless steel: composition, strength, corrosion resistance and when to use each
How 304 (1.4301) and 316 (1.4401/1.4404) stainless steel differ in composition, PREN, strength and chloride resistance, what the L grades and A2/A4 fasteners mean, and which grade to choose.
Read the guide →Flange dimensions: EN 1092-1 PN6 to PN40 and ASME B16.5 Class 150 and 300
Flange dimension tables for EN 1092-1 PN6, PN10, PN16, PN25 and PN40 and ASME B16.5 Class 150 and 300: outside diameter, bolt circle, number and size of bolts, and why PN and Class flanges do not mate.
Read the guide →