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Duplex Fittings are wrought fittings in ferritic-austenitic duplex stainless steel, most commonly grade 2205 (UNS S31803/S32205), manufactured to ASTM A815 / ASME SA815 with dimensions per ASME B16.9, B16.28 and MSS SP-43. Their PREN rating of 35+ gives roughly double the yield strength of 316L fittings along with far stronger resistance to chloride pitting and stress corrosion cracking, which is why EPCs specify Duplex Fittings for offshore, desalination and sour-service piping systems. We keep Duplex Fittings PMI-verified and ex-forge across every schedule from SCH 10S to SCH XXS, ready to dispatch with MTC.
1/2″ - 48″ NB
Buttweld, cut to any schedule
ASTM / ASME A815 & SA815
Dimensions per ASME B16.9 & B16.28
UNS S31803 / S32205
Duplex 2205 - WNr 1.4462 equivalent
12 Forms Ex-Stock
Elbow, Tee, Reducer, Cross, Cap & more
35 Minimum
Superior pitting resistance vs 316L fittings
EN 10204 3.1 / 3.2
NACE MR0175 & PMI on request
Ready Forged Stock
Elbows & tees held in yard, not built to order
PMI On Every Heat
Alloy content verified before dispatch, not after
Any NB & Schedule
Off-list sizes forged and machined on request
Rate Locked At Booking
Nickel surcharge fixed the day you confirm order
Export-Ready Packing
Seaworthy crating, MTC & COO paperwork attached
One Desk, Order To Delivery
Same engineer tracks your enquiry through dispatch
📌 Table of Contents
As a trusted Duplex Fittings supplier working directly with EPCs and OEMs, we match every enquiry against project chemistry and dimensional standard before booking. Our in-house PMI verification and forge-linked stock let us confirm chemistry and dispatch Duplex Steel Pipe Fittings within hours of order confirmation.
Duplex fittings aren't something you order casually, one wrong grade or a missed PMI check, and an entire shutdown schedule slips. That's the risk buyers are actually managing when they place this order. We built our stock around that reality: elbows and tees held ready in the yard, not built to order after your PO lands.
Every heat gets PMI-verified before it ships, not after, so there's no surprise when the material reaches site. Need an off-list size? We forge and machine it on request instead of turning the order away. Nickel pricing gets locked the moment you confirm, not floated against tomorrow's market. And whether it's headed across India or overseas, packing goes out export-ready, crated, MTC and COO attached, no follow-up needed. One person tracks it start to finish.
We're a trusted Duplex Fittings supplier in India, checked and dispatched fast.
Book today and the quoted rate holds until dispatch – no last-minute surcharge on nickel movement.
Being a Duplex Pipe Fittings Manufacturers In India-recognised stock point keeps PMI turnaround same-day on every enquiry.
Our Mumbai yard makes us the region's go-to Duplex Fittings stockist in Mumbai.
Every piece is chemistry-checked before it leaves the yard, whatever size or schedule you need.
Center-to-end dimensions for Duplex 2205 Equal Tee, outlet and run measured per ASME B16.9.
| Nominal Pipe Size | Outside Diameter (mm) | Centre-To-End Dimension (mm) | |
|---|---|---|---|
| Branch Outlet (M) | Header Run (C) | ||
| 1 1/2 | 48.3 | 57 | 57 |
| 12 | 323.8 | 254 | 254 |
| 3/4 | 26.7 | 29 | 29 |
| 10 | 273.0 | 216 | 216 |
| 2 1/2 | 73.0 | 76 | 76 |
| 16 | 406.4 | 305 | 305 |
| 8 | 219.1 | 178 | 178 |
| 20 | 508.0 | 381 | 381 |
| 1 1/4 | 42.2 | 48 | 48 |
| 3 1/2 | 101.6 | 95 | 95 |
| 5 | 141.3 | 124 | 124 |
| 3 | 88.9 | 86 | 86 |
| 6 | 168.3 | 143 | 143 |
| 4 | 114.3 | 105 | 105 |
| 2 | 60.3 | 64 | 64 |
| 14 | 355.6 | 279 | 279 |
| 1 | 33.4 | 38 | 38 |
| 18 | 457.0 | 343 | 343 |
| 1/2 | 21.3 | 25 | 25 |
Reducing Tee dimension sheets are issued alongside your formal quotation on request.As a seasoned Duplex Fittings exporter, paperwork and shipping move as fast as the order.
Share your grade, type and size - our desk replies with pricing, MTC and lead time within 48 hours.
As a leading Duplex Pipe Fittings Manufacturer In India, our warehouse holds every schedule ready for immediate lifting, trusted by buyers across India and export markets for urgent shutdown and turnaround needs.
UNS S31803, the standard Duplex 2205 grade
UNS S32205, higher-nitrogen variant of 2205
ASME-stamped equivalent for code-stamped projects
ASME-stamped, higher-nitrogen 2205 grade
Welding fitting grade for buttweld construction
We're a Duplex Fittings manufacturer in India that never trades chemistry for speed.
Consistent chemistry across every heat, verified on our own PMI gun before your Duplex Fittings order ships.
21.0 - 23.0%
4.5 - 6.5%
2.5 - 3.5%
0.08 - 0.20%
0.03% max
Every order ships PMI-checked - that's our name as a Duplex Fittings supplier in India.
Minimum mechanical properties for Duplex 2205 Fittings as per ASTM A815.
Hardness 290 HB max, per ASTM A815
Values are typical minimums , confirm project-specific acceptance criteria on your Duplex Fittings Material Specification sheet. Real stock, real check -that's what a genuine Duplex Fittings stockist in Mumbai offers.
Allowable pressure (psig) by NPS and schedule for Duplex 2205 buttweld fittings at two service temperatures.
| Duplex 2205 Fitting - Allowable Pressure By Fitting Class (psig) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size (NPS) | Schedule | OD (in) | Wall Thickness (in) | Fitting Class Rating | ||||
| Class 300 | Class 100 | Class 200 | Class 400 | Class 500 | ||||
| 4 | 80 | 4.0500 | 0.0337 | 1596 | 1596 | 1596 | 1482 | 1377 |
| 6 | 160 | 6.0625 | 0.0719 | 2382 | 2382 | 2382 | 2211 | 2054 |
| 10 | 40 | 10.0750 | 0.0365 | 699 | 699 | 699 | 649 | 603 |
| 2 | 80 | 2.0375 | 0.0218 | 1985 | 1985 | 1985 | 1843 | 1712 |
| 1 1/2 | 40 | 1.0900 | 0.0145 | 1629 | 1629 | 1629 | 1512 | 1404 |
| 3 | 40 | 3.0500 | 0.0216 | 1301 | 1301 | 1301 | 1208 | 1122 |
| 3 | 160 | 3.0500 | 0.0438 | 2787 | 2787 | 2787 | 2587 | 2403 |
| 4 | 40 | 4.0500 | 0.0237 | 1102 | 1102 | 1102 | 1023 | 950 |
| 8 | 80 | 8.0625 | 0.0500 | 1218 | 1218 | 1218 | 1131 | 1050 |
| 2 | 40 | 2.0375 | 0.0154 | 1371 | 1371 | 1371 | 1272 | 1182 |
| 5 | 80 | 5.0563 | 0.0375 | 1428 | 1428 | 1428 | 1325 | 1231 |
| 2 | 160 | 2.0375 | 0.0344 | 3283 | 3283 | 3283 | 3047 | 2831 |
| 1 1/2 | 160 | 1.0900 | 0.0281 | 3362 | 3362 | 3362 | 3120 | 2899 |
| 10 | 160 | 10.0750 | 1.0125 | 2289 | 2289 | 2289 | 2124 | 1974 |
| 5 | 40 | 5.0563 | 0.0258 | 965 | 965 | 965 | 896 | 832 |
| 1 1/2 | 80 | 1.0900 | 0.0200 | 2303 | 2303 | 2303 | 2138 | 1986 |
| 10 | 80 | 10.0750 | 0.0594 | 1159 | 1159 | 1159 | 1075 | 999 |
| 4 | 160 | 4.0500 | 0.0531 | 2611 | 2611 | 2611 | 2424 | 2552 |
| 8 | 160 | 8.0625 | 0.0906 | 2298 | 2298 | 2298 | 2133 | 1982 |
| 6 | 80 | 6.0625 | 0.0432 | 1379 | 1379 | 1379 | 1280 | 1189 |
| 6 | 40 | 6.0625 | 0.0280 | 877 | 877 | 877 | 814 | 756 |
| 5 | 160 | 5.0563 | 0.0625 | 2474 | 2474 | 2474 | 2296 | 2133 |
| 3 | 80 | 3.0500 | 0.0300 | 1844 | 1844 | 1844 | 1712 | 1590 |
| 8 | 40 | 8.0625 | 0.0322 | 771 | 771 | 771 | 716 | 665 |
Ratings assume seamless construction - share your exact schedule and design temperature for a project-specific rating sheet.Container-ready crating, on-time sailing - your trusted Duplex Fittings exporter.
Send us the NPS and schedule - we check stock and revert with dimensions and price the same day.
Forged to your drawing - that's our promise as a Duplex Fittings manufacturer in India.
End-to-end and outside diameter for Duplex 2205 Concentric & Eccentric Reducer, per ASME B16.9.
| Reducing Size (Large x Small NPS) | Overall Length (mm) | Outside Diameter (mm) | |
|---|---|---|---|
| Small End (P) | Large End (D) | ||
| 8 x 3 1/2 | 152 | 101.06 | 219.01 |
| 22 x 16 | 508 | 406.04 | 559 |
| 1 x 3/4 | 51 | 26.07 | 33.04 |
| 1 1/2 x 1/2 | 64 | 21.03 | 48.03 |
| 2 1/2 x 2 | 89 | 60.03 | 73 |
| 5 x 3 1/2 | 127 | 101.06 | 141.03 |
| 20 x 12 | 508 | 323.09 | 508 |
| 3 x 1 1/4 | 89 | 42.02 | 88.09 |
| 24 x 22 | 508 | 559 | 610 |
| 24 x 16 | 508 | 406.04 | 610 |
| 18 x 14 | 381 | 355.06 | 457 |
| 10 x 6 | 178 | 168.01 | 273.01 |
| 24 x 18 | 508 | 457 | 610 |
| 12 x 8 | 203 | 219.01 | 323.09 |
| 12 x 6 | 203 | 168.03 | 323.09 |
| 20 x 8 | 508 | 219.01 | 508 |
| 22 x 14 | 508 | 355.06 | 559 |
| 2 x 1 1/2 | 76 | 48.02 | 60.03 |
| 10 x 5 | 178 | 141.03 | 273.01 |
| 1 x 1/2 | 51 | 21.03 | 33.04 |
| 6 x 5 | 140 | 141.03 | 168.03 |
| 1 1/4 x 1 | 51 | 33.04 | 42.02 |
| 5 x 3 | 127 | 88.09 | 141.03 |
| 4 x 2 1/2 | 102 | 73 | 114.03 |
| 16 x 12 | 356 | 323.09 | 406.04 |
| 3 x 2 1/2 | 89 | 73 | 88.09 |
| 1 1/2 x 3/4 | 64 | 26.07 | 48.03 |
| 5 x 2 1/2 | 127 | 73 | 141.03 |
| 4 x 2 | 102 | 60.03 | 114.03 |
| 24 x 12 | 508 | 323.09 | 610 |
| 20 x 18 | 508 | 457 | 508 |
| 3/4 x 1/2 | 38 | 21.03 | 26.07 |
| 3 1/2 x 3 | 102 | 88.09 | 101.06 |
| 24 x 10 | 508 | 273.01 | 559 |
| 5 x 4 | 127 | 114.03 | 141.03 |
| 12 x 10 | 203 | 273.01 | 323.09 |
| 14 x 12 | 330 | 323.09 | 355.06 |
| 3/4 x 3/8 | 38 | 17.01 | 26.07 |
| 3 1/2 x 2 | 102 | 60.03 | 101.06 |
| 8 x 6 | 152 | 168.03 | 219.01 |
| 18 x 10 | 381 | 273.01 | 457 |
| 12 x 5 | 203 | 141.03 | 323.09 |
| 2 x 1 | 76 | 33.04 | 60.03 |
| 18 x 12 | 381 | 323.09 | 457 |
| 24 x 20 | 508 | 508 | 610 |
| 2 1/2 x 1 1/4 | 89 | 42.02 | 73 |
| 24 x 10 | 508 | 273.01 | 610 |
Custom reducer bushings and off-list combinations are machined to drawing on request.What we quote is what ships - that's our word as a Duplex Fittings supplier in India.
Center-to-end dimensions for Duplex 2205 Elbow - Long Radius vs 3D pattern, per ASME B16.9.
| NPS | OD (mm) | Long Radius Elbow (Center-To-End, mm) | 3D Elbow (Center-To-End, mm) | ||
|---|---|---|---|---|---|
| 45° (B) | 90° (A) | 45° (B) | 90° (A) | ||
| 2 | 60.03 | 35 | 76 | 63 | 152 |
| 10 | 273 | 159 | 381 | 316 | 762 |
| 1¼ | 42.02 | 25 | 48 | 39 | 95 |
| 3½ | 101.06 | 57 | 133 | 111 | 267 |
| 3/4 | 26.07 | 19 | 38 | 24 | 57 |
| 3 | 88.09 | 51 | 114 | 95 | 229 |
| 2½ | 73 | 44 | 95 | 79 | 190 |
| 1 | 33.04 | 22 | 38 | 31 | 76 |
| 14 | 355.06 | 222 | 533 | 441 | 1067 |
| 8 | 219.01 | 127 | 305 | 252 | 610 |
| 5 | 141.03 | 79 | 190 | 157 | 381 |
| 6 | 168.03 | 95 | 229 | 189 | 457 |
| 1½ | 48.03 | 29 | 57 | 47 | 114 |
| 12 | 323.08 | 190 | 457 | 378 | 914 |
| 4 | 114.03 | 64 | 152 | 127 | 305 |
Full dimension sheets for Tee, Reducer, Cap & Cross ship with every formal quotation. For urgent orders, we're the Duplex Fittings stockist in Mumbai you can count on.
Approximate weight per piece (kg) - Sch 40S 90° LR Elbow vs Equal Tee.
| Nominal Size (Inch) | Approx. Weight (kg) |
|---|---|
| 2 | 0.66 |
| 12 | 61 |
| 1 | 0.15 |
| 6 | 10.7 |
| 24 | 377 |
| 1 1/4 | 0.25 |
| 1/2 | 0.08 |
| 18 | 176 |
| 16 | 121 |
| 3 | 2.19 |
| 2 1/2 | 1.37 |
| 1 1/2 | 0.39 |
| 5 | 6.89 |
| 10 | 37 |
| 3/4 | 0.11 |
| 4 | 4.12 |
| 14 | 85.1 |
| 8 | 21.6 |
Figures are Sch 40S indicative - share NB, schedule and quantity for an exact weight and freight-ready packing list.One container or ten, our record as a Duplex Fittings exporter speaks for itself.
Radius reference for Duplex 2205 elbow and tee patterns, ex-forge and custom-pulled.
1.5 x Diameter (1.5D) - sizes ½″ to 48″
1 x Diameter (1D) - sizes ½″ to 24″
1.5 x Diameter (1.5D) - sizes ½″ to 48″
Branch radius equal to header size diameter
2D, 3D, 5D or 10D - forged to drawing on request
Variable radius - sizes ¼″ to 36″
Indicative ranges only - Duplex Fittings price tracks the Ni/Mo alloy surcharge daily, confirm on the day of booking.
| Types | Size | Price In USD (Indicative) |
|---|---|---|
| Tee | 6″ x Sch. 40S | US $316.00 |
| 3″ x Sch. 40S | US $131.00 | |
| 14″ x Sch. 40S | US $1,148.00 | |
| Duplex Steel Elbow | 1″ x Sch. 40S | US $35.60 |
| 2.1/2″ x Sch. 40S | US $68.50 | |
| 1.1/4″ x Sch. 40S | US $44.10 | |
| 3/4″ x Sch. 40S | US $38.55 | |
| End Cap | 8″ x Sch. 40S | US $232.00 |
| 4″ x Sch. 40S | US $136.00 | |
| 1″ x Sch. 40S | US $37.95 |
Rates move with the nickel and molybdenum alloy surcharge - share your fitting type and quantity for today’s locked price.
Wall thickness is verified against the mill certificate before it's cleared for same-week lifting.
Grade S31803 fittings held ex-forge in our Mumbai yard, ready for same-week lifting.
½″ to 10″
350+ pcs½″ to 14″
300+ pcs½″ to 14″
500+ pcs½″ to 14″
200+ pcs½″ to 14″
400+ pcs½″ to 14″
250+ pcs½″ to 14″
250+ pcs½″ to 4″
100+ pcs½″ to 24″
150+ pcsA quick look at what typically moves out of our yard every week.
Duplex Stainless Steel 90° LR/SR Elbow
45° Duplex 2205 Elbow
ASME B16.9 Duplex Equal Tee
2″ Sch 40 ASME B16.9 2205 Elbow
Duplex 2205 Seamless Elbow & Tee Reducer Set
Duplex Stainless Steel Fittings DN8mm-DN2000mm
Standard with every dispatch, 3.2 on request
Every heat checked before it leaves the yard
Pressure and weld-quality testing on request
Sour-service compliance for oil & gas orders
Every Duplex Fittings heat ships with 3.1 certification ready - request 3.2 or NACE paperwork upfront and we attach it to your quote.
Offshore Platforms
Desalination Plants
Oil & Gas Processing
Chemical & Petrochemical
Pulp & Paper
Marine & Shipbuilding
Desal & Seawater Cooling
Power Generation
Duplex Fittings scrap holds real alloy value - here’s how the loop works.
Offcuts and rejects go straight back into the melt shop - nothing wasted.
Nickel, chromium and molybdenum are reclaimed and reused at full value.
Scrap is remelted into fresh billet for the next batch of fittings.
Recycled melt uses meaningfully less energy than primary production.
Less mining and lower emissions per tonne of finished fitting.
Alloy content keeps Duplex scrap priced well above carbon steel scrap.
4″ SCH 80S, seamless, PMI verified & hydrotested.
Offshore EPC Contractor, Nigeria
LAGOS, NIGERIA6″ SCH 40S, buttweld tee, RT inspected.
Desalination Plant Contractor, Saudi Arabia
DAMMAM, SAUDI ARABIA3″ x 2″ SCH 80S, seamless, NACE MR0175 compliant.
Gas Processing Contractor, Egypt
CAIRO, EGYPT8″ SCH 40S, welded, EN 10204 3.1 MTC.
Marine Terminal Contractor, Mexico
VERACRUZ, MEXICO2″ SCH 80S, seamless, PMI & hydrotest certified.
Chemical Plant Contractor, Morocco
CASABLANCA, MOROCCO10″ SCH XXS, seamless, PWHT & UT tested.
Subsea EPC Contractor, UAE
SHARJAH, UAEUrgent Duplex Fittings requirement for a turnaround or shutdown - call our desk and we prioritise ex-stock dispatch over standard orders.
Duplex Fittings carry a PREN near 35, while Super Duplex Fittings carry a PREN above 40
ASTM A815 / ASME SA815 covers wrought duplex fittings
UNS S31803 and UNS S32205 are the standard duplex 2205 codes.
Yes, mildly.
Every order ships with an EN 10204 3.1 mill test certificate. 3.2 certification, NACE MR0175 and PMI reports
Duplex Fittings fall under HSN 7307
Ex-stock sizes dispatch within 48 hours. Forged-to-size or large-bore indent orders usually take 6-8 weeks.
Why Aesteiron?
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Share NB, schedule, fitting type and quantity - our desk confirms price, MTC and dispatch date the same day.
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