How European engineers choose between weld neck, slip-on, and blind flanges under EN 1092-1.
📘 What you’ll learn:
- ✅ Core differences between weld neck, slip-on & blind flanges
- 📊 EU applications where each type is preferred
- ⚡ Strength, sealing & cost comparison
- 📝 How to specify PN & certificates in RFQs
In the EU, weld neck, slip-on, and blind flanges cover more than 70% of EN 1092-1 flange demand. Knowing which one to use can reduce maintenance issues and lower cost. This cheat sheet gives EU buyers a fast, practical reference.
Quick Comparison: Weld Neck vs Slip-On vs Blind
| Flange Type | Strength & Integrity | Cost Level | Common EU Applications |
|---|---|---|---|
| Weld Neck | Highest, seamless weld + stress distribution | High | High-pressure steam, oil & gas, refineries |
| Slip-On | Medium, welded on both sides but less robust | Medium | General industry, HVAC, food/pharma utilities |
| Blind | Not for flow — seals or closes pipeline ends | Medium | Pipe termination, pressure test points |
When to Choose Each Flange Type
🔵 Weld Neck
✔ For PN25–PN100 lines
✔ Best for high stress + cyclic service
✔ Use with EN 10204 3.2 when safety critical
🟢 Slip-On
✔ For PN10–PN25
✔ Economical choice in utilities
✔ Works well with stainless 316L & PN16
🔴 Blind
✔ To block or pressure-test
✔ Needed in every piping system
✔ Easy removal during maintenance
Buyer’s Checklist
📝 Always include in your RFQ:
- ✔ Flange type (weld neck, slip-on, blind)
- ✔ PN rating (PN16, PN40, etc.)
- ✔ Material grade (316L, Duplex, Carbon)
- ✔ Certificate required (EN 10204 3.1 or 3.2)
Need EN 1092-1 flanges (weld neck, slip-on, blind) delivered DDP Europe?
Request a 24h Quote →Conclusion
Each flange type has a clear purpose. Weld neck = strength, Slip-on = economy, Blind = sealing. Knowing when to use each under EN 1092-1 saves time, cost, and ensures compliance in EU plants.
See our Europe flange page or request a DDP quote today.
