Flanges & stub ends
We supply steel flanges to EN 1092-1 and ASME B16.5, from DN10 up to large-diameter plate flanges, in PN6 – PN100 and Class 150 – 2500. The range includes weld-neck, slip-on, blind, lap-joint, threaded and socket-weld flanges, plus RTJ-faced flanges, orifice flanges, hot-dip galvanised flanges and stub ends. Materials run from elevated-temperature P245GH and ASTM A105N to low-temperature, stainless and duplex grades.
- Sourced direct from manufacturers
- No minimum order quantity
- The complete package in one quote
Specification
- Outside diameter
- 21,3 – 457 mm
- Wall thickness
- 2 – 4 mm
Material and standards
- Standards
- EN 1092-1 · ASME B16.5 · DIN 2642
- Material grades
- P245GH · P250GH · P355NH · A105N · LF2 · F11/F22 · 1.4404 · 1.4571 · F51/F53
Overview
- Types: weld-neck, slip-on, blind, lap-joint, threaded and socket-weld flanges.
- Special versions: RTJ-faced flanges, orifice flanges, hot-dip galvanised flanges and stub ends.
How to choose a flange
A flange forms one system with its gasket and bolting. Its type, pressure rating, facing and material must therefore match the pipe and the valves.
- Weld-neck (EN Type 11 / ASME WN): for pressurised and thermally loaded lines.
- Slip-on / plate (Type 01 / SO): for lighter duty.
- Blind (Type 05 / BL): for closures.
- Lap-joint with stub end (Type 02 / 04 / LJ): for stainless lines, where the flange itself can be carbon steel.
- RTJ flanges: for high-pressure oil and gas systems.
EN and ASME flanges have different bolt patterns and facings, so they must not be mixed on one line.
Material range
- Elevated-temperature: P245GH, P250GH, P265GH, P280GH, P355QH1, 16Mo3, 13CrMo4-5.
- Fine-grain and low temperature: P355NH, P355NL1, X8Ni9.
- ASTM: A105N; A350 LF2 / LF3; A182 F11, F22, F91; A694 F42 – F70.
- Stainless and duplex: 1.4301 – 1.4571, F51, F53, F55.
- Nickel alloys: on request.
What to include in your RFQ:
- standard and type;
- DN / PN or NPS / Class;
- facing;
- weld-neck bore;
- grade;
- certificate.
Frequently asked questions
What is a B1 facing?
The EN 1092-1 raised-face type for flat gaskets, the counterpart of the ASME RF (raised face).
Do you supply orifice flanges?
Yes, orifice flanges and orifice plates too.
Size table
EN 1092-1 (DN × PN)
| DN | PN6 | PN10 | PN16 | PN25 | PN40 | PN63 | PN100 |
|---|---|---|---|---|---|---|---|
| DN10 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN15 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN20 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN25 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN32 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN40 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN50 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN65 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN80 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN100 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN125 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN150 | 01 02 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 02 04 05 11 13 | 01 05 11 | 01 05 11 |
| DN200 | 01 02 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 05 11 | 01 05 11 |
| DN250 | 01 02 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 05 11 | 01 05 11 |
| DN300 | 01 02 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 05 11 | 01 05 11 |
| DN350 | 01 02 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 05 11 | 01 05 11 |
| DN400 | 01 02 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 05 11 | – |
| DN450 | 01 02 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | – | – |
| DN500 | 01 02 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | – | – |
| DN600 | 01 02 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | 01 02 04 05 11 | – | – |
| DN700 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | – | – | – |
| DN800 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | – | – | – |
| DN900 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | – | – | – |
| DN1000 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | – | – | – |
| DN1200 | 01 02 05 11 | 01 02 05 11 | 01 02 05 11 | – | – | – | – |
| DN1400 | 05 11 | 05 11 | 05 11 | – | – | – | – |
| DN1600 | 05 11 | 05 11 | 05 11 | – | – | – | – |
| DN1800 | 05 11 | 05 11 | 05 11 | – | – | – | – |
| DN2000 | 05 11 | 05 11 | 05 11 | – | – | – | – |
ASME B16.5 (NPS × Class)
| NPS | Class 150 | Class 300 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|
| ½" | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL WN | BL WN | BL WN |
| ¾" | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL WN | BL WN | BL WN |
| 1" | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL WN | BL WN | BL WN |
| 1¼" | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL WN | BL WN | BL WN |
| 1½" | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL WN | BL WN | BL WN |
| 2" | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL WN | BL WN | BL WN |
| 2½" | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL WN | BL WN | BL WN |
| 3" | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL LJ SO SW THD WN | BL WN | BL WN | BL WN |
| 4" | BL LJ SO THD WN | BL LJ SO THD WN | BL LJ SO THD WN | BL WN | BL WN | BL WN |
| 5" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | BL WN |
| 6" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | BL WN |
| 8" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | BL WN |
| 10" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | BL WN |
| 12" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | BL WN |
| 14" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | – |
| 16" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | – |
| 18" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | – |
| 20" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | – |
| 24" | BL LJ SO WN | BL LJ SO WN | BL LJ SO WN | BL WN | BL WN | – |
Stub ends
| DN | NPS | OD (mm) | Wall (mm) |
|---|---|---|---|
| DN15 | ½" | 21,3 | 2 |
| DN20 | ¾" | 26,9 | 2–2,5 |
| DN25 | 1" | 33,7 | 2 |
| DN32 | 1¼" | 42,4 | 2–2,5 |
| DN40 | 1½" | 48,3 | 2–3,5 |
| DN50 | 2" | 60,3 | 2–4 |
| DN65 | 2½" | 76,1 | 2–4 |
| DN80 | 3" | 88,9 | 2–3,5 |
| DN100 | 4" | 114,3 | 2–3,5 |
| DN125 | 5" | 139,7 | 2–3,5 |
| DN150 | 6" | 168,3 | 2–3,5 |
| DN200 | 8" | 219,1 | 2–3,5 |
| DN250 | 10" | 273 | 2–3,5 |
| DN300 | 12" | 323,9 | 3–3,5 |
| DN350 | 14" | 355,6 | 3–3,5 |
| DN400 | 16" | 406,4 | 3–3,5 |
| DN450 | 18" | 457 | 3 |
Typically available from stock. Other sizes on request.
Listed items show the typical range; we also quote custom specifications.
Send us your material list – one quote for the complete package (pipe, fittings, flanges, gaskets, bolting), sourced direct from manufacturers, no minimum order.
Request a quote