Duplex 2205 Stub EndASTM A815 · ASME B16.9 · Manufacturer, stockist & exporter, India
UNS S32205 / S31803 · W.Nr 1.4462
A Duplex 2205 stub end is a short pipe length with a flared lap that works with a lap joint flange, made from Duplex 2205 to ASTM A815 WPS31803 / WPS32205. Stub ends are welded to the pipe and backed by a loose lap joint flange. Type A (long pattern, ASME B16.9) and short-pattern MSS SP-43 stub ends are the common choices.
- ASTM A815
- ASME B16.9
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a Duplex 2205 Stub End?
- What it is
- A short pipe length with a flared lap that works with a lap joint flange
- Material
- ASTM A815 WPS31803 / WPS32205
- Dimensions
- ASME B16.9 · MSS SP-43
- Grade
- Duplex 2205 · UNS S32205
- Best at
- Strength with chloride resistance at a stainless-steel budget
Duplex 2205 Stub End Specification
| Product | Duplex 2205 Stub End |
|---|---|
| Material standard | ASTM A815 WPS31803 / WPS32205 |
| Dimensional standard | ASME B16.9 · MSS SP-43 |
| Sizes | ½" – 48" |
| Wall / class | Sch 5S – XXS, to match pipe |
| Ends | Bevelled to ASME B16.25 |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Stub End
Stub ends are welded to the pipe and backed by a loose lap joint flange. Type A (long pattern, ASME B16.9) and short-pattern MSS SP-43 stub ends are the common choices.
- Long pattern (ASME B16.9) and short pattern (MSS SP-43)
- Type A, B and C lap designs
- Used with a carbon-steel backing flange to save alloy
More on choosing: Stub end guide.
Duplex 2205 Stub End: Why 2205 for stub ends
Stub ends are welded to the pipe and backed by a loose lap joint flange. Type A (long pattern, ASME B16.9) and short-pattern MSS SP-43 stub ends are the common choices. In Duplex 2205, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Duplex fittings match duplex pipe in chloride service and strength. Duplex 2205 is picked for strength with chloride resistance at a stainless-steel budget. |
|---|---|
| Typical service | Oil & gas — Flowlines, manifolds and topside piping. |
| Welding to carbon steel | ER2209 or ER309L(Mo) is used when joining it to carbon steel, under a qualified WPS |
| Matching filler | ER2209 (AWS A5.9) |
| Sour service | Listed in NACE MR0175 / ISO 15156-3 within its limits — state it on the order |
Duplex 2205 Stub End Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 22.0 – 23.0 |
| Nickel | 4.5 – 6.5 |
| Molybdenum | 3.0 – 3.5 |
| Nitrogen | 0.14 – 0.20 |
| Carbon | 0.030 max |
| Manganese | 2.00 max |
| Silicon | 1.00 max |
| Phosphorus | 0.030 max |
Duplex 2205 Stub End Mechanical Properties
| Solution-annealed plate & sheet | Value |
|---|---|
| Tensile strength | 655 MPa · 95 ksi |
| Yield strength 0.2% | 450 MPa · 65 ksi |
| Elongation | 25% |
| Hardness | 293 HB max |
Full chemistry, properties and equivalents are on the Duplex 2205 grade page.
Other Duplex 2205 pipe fittings
Duplex 2205 Stub Ends for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiDuplex 2205 Stub End — questions buyers ask
Long or short stub end?
Long-pattern stub ends to ASME B16.9 suit most piping; short-pattern MSS SP-43 stub ends save alloy and space in low-pressure lines.
Can Duplex 2205 stub ends be welded to carbon steel?
Yes — ER2209 or ER309L(Mo) is used when joining it to carbon steel, under a qualified WPS.
Which standard covers Duplex 2205 stub ends?
The material is ASTM A815 WPS31803 / WPS32205; dimensions follow ASME B16.9 · MSS SP-43. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Duplex 2205 stub end?
The alloy price, the size and schedule or class, quantity, and the testing and documents required. Send your list and we quote the same working day.
Can you supply Duplex 2205 stub ends to NACE MR0175?
Yes. Duplex 2205 is listed in NACE MR0175 / ISO 15156-3 within its limits; state NACE compliance on the order and it is confirmed on the certificate.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026