Duplex Steel Buttweld Fittings
Duplex Steel Buttweld Fittings
Duplex steel buttweld fittings are precision engineered components used to join & direct flow within industrial piping systems. Manufactured from duplex stainless steel material for combining properties of both ferritic steel and the corrosion resistance of austenitic steel. These fittings include elbows, tees, reducers, caps & stub ends designed for butt weld connections that ensure a strong & leak-proof joint. Known for superior mechanical strength, excellent resistance to pitting & stress corrosion cracking.
Key Features:
- High resistance to chloride stress corrosion
- Better seawater performance than standard 300-series stainless steel
- Excellent durability at both low and moderate temperatures
They also provide better performance than many austenitic grades in environments where premature failure is common. Though slightly more challenging to machine, their long service life, cost efficiency & high strength-to-weight ratio make them a preferred choice for critical applications.
Duplex Stainless Steel Buttweld Fittings Manufacturer & Supplier
Kalpataru Piping Solutions is a trusted manufacturer, supplier & exporter of high quality duplex steel products including buttweld fittings which are designed to deliver the best performance in demanding industrial environments. Manufactured by using premium grades such as Duplex S31803 & S32205 having exceptional mechanical strength, corrosion resistance & long service life.
They are manufactured to meet global standards such as ASTM A815 & ASME SA815 to ensure compatibility & reliability across applications. With excellent resistance to chloride may induce stress corrosion, pitting & crevice corrosion. These fittings are used in industries where durability & resistance to harsh conditions is important. Every final product is tested for dimensional accuracy, pressure tolerance & material integrity before dispatch. We offer cost-effective pricing to maintain world-class quality standards.
Get in touch with Kalpataru Piping Solutions today for custom sizes, competitive quotes & prompt delivery.
Grades of Duplex Stainless Steel Buttweld Fittings
We offer Duplex steel UNS S31803 buttweld fittings which are available in two grades like UNS S31803 & UNS S32205. Let’s understand each of the grades in detail with the below description.
Duplex Steel UNS S31803 Buttweld Fittings
These Fittings known for excellent resistance to stress corrosion, pitting & fatigue. Ideal for chemical, petrochemical & offshore applications to provide reliable performance in demanding conditions.
Duplex Steel UNS S32205 Buttweld Fittings
These Fittings deliver enhanced strength & corrosion resistance in chloride-rich and marine environments. Used in pipelines, refineries & pressure systems where durability and structural integrity are crucial.
Duplex Steel Buttweld Fittings Specifications
Discover detailed specifications of Duplex Steel Buttweld Fittings including grades, sizes, schedules, pressure ratings, and dimensional standards as per ASTM A815 & ASME SA815 for reliable performance in critical applications.
| Specifications | ASTM A815 / ASME SA815 |
| Size |
Seamless Butt Weld Fittings: 1/2″ – 10″ Welded Butt Weld Fittings: 1/2″ – 48″ |
| Thickness | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
| Type | DN15-DN1200 |
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom MSS Sp-43 Stainless Steel Pipe Fitting |
| Size Range | ½” NB to 24″ NB in Sch 10s, 40s, 80s, 160s, XXS. (DN6~DN100) ASTM A815 Stainless Steel Buttweld Fitting |
| Elbows |
Angle : 22.5 deg, 30deg, 45 deg, 90 deg, 180 deg, 1.0D, 1.5D, 2.0D, 2.5D, 3D, 4D, 5D, 6D, 7D-40D . Standard: ASME B16.9, ASME B16.28, ASME B16.25, MSS SP-75 DIN2605 JISB2311 JISB2312 JISB2313, BS, GB, ISO |
| Connection | Welding |
| Manufacturing process | Forge, Cast, Push, Press, etc. |
| Key markets and industries |
Bitumen upgraders. Heavy oil refineries. Petrochemicals and acids. Nuclear power (mostly seamless). |
| Test Certificates |
EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Specialized manufacturer of | 90º Elbows, 45º Elbows, Tees, Crosses, Reducers, Pipe Cap, Stub End, Pipe Bend |
Chemical Composition Of Duplex Steel Welded Fittings
Let’s learn more about the balanced chemical composition of duplex steel welded fittings, including key elements like chromium, nickel, molybdenum, and nitrogen that deliver high strength, corrosion resistance, and durability in harsh industrial environments.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
Duplex Stainless Steel Buttweld Fittings Mechanical Properties
Duplex steel buttweld fittings offer high tensile strength, excellent yield strength, and superior resistance to stress corrosion cracking—making them ideal for high-pressure and corrosive applications across various industrial environments.
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 / S32205 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
Equivalent Grades for Duplex Steel Buttweld Fittings
Find equivalent grades for Duplex Steel Buttweld Fittings such as Duplex 2205 – including UNS S31803, UNS S32205, EN 1.4462, and ASTM A815 – offering reliable strength and corrosion resistance for industrial applications.
| STANDARD | WERKSTOFF NR. | UNS |
| Duplex 2205 | 1.4462 | S31803 / S32205 |
Duplex Steel Buttweld Fittings Dimensions
Get to know about the standard dimensions of Duplex Steel Buttweld Fittings including elbows, tees, reducers, and caps. Available in sizes from ½” to 48” with schedules ranging from SCH 10 to SCH XXS, meeting ANSI/ASME B16.9 and international dimensional standards.
|
Nominal Pipe Size |
Outside Diameter |
90° Elbows | 45° Elbows | 180° Returns | ||||
| (inches) | Long Radius | Short Radius | Long Radius | Long Radius | ||||
| (mm) | (inches) |
Center to Face (inches) |
Center to Face (inches) |
Center to Face (inches) |
Radius (inches) |
Center to Center (inches) |
Back to face (inches) |
|
| 1/2 | 21.3 | 0.840 | 1 1/2 | – | 5/8 | 2 | 1 7/8 | |
| 3/4 | 26.7 | 1.050 | 1 1/8 | – | 7/16 | 2 1/4 | 1 11/16 | |
| 1 | 33.4 | 1.315 | 1 1/2 | 1 | 7/8 | 3 | 2 3/16 | |
| 1 1/4 | 42.2 | 1.660 | 1 7/8 | 1 1/4 | 1 | 3 3/4 | 2 3/4 | |
| 1 1/2 | 48.3 | 1.900 | 2 1/4 | 1 1/2 | 1 1/8 | 3 | 4 1/2 | 3 1/4 |
| 2 | 60.3 | 2.375 | 3 | 2 | 1 3/8 | 4 | 6 | 4 3/16 |
| 2 1/2 | 73.0 | 2.875 | 3 3/4 | 2 1/2 | 1 3/4 | 5 | 7 1/2 | 5 3/16 |
| 3 | 88.9 | 3.500 | 4 1/2 | 3 | 2 | 6 | 9 | 6 1/4 |
| 3 1/2 | 101.6 | 4.000 | 5 1/4 | 3 1/2 | 2 1/4 | 7 | 10 1/2 | 7 1/4 |
| 4 | 114.3 | 4.500 | 6 | 4 | 2 1/2 | 8 | 12 | 8 1/4 |
| 5 | 141.3 | 5.563 | 7 1/2 | 5 | 3 1/8 | 10 | 15 | 10 5/16 |
| 6 | 168.3 | 6.625 | 9 | 6 | 3 3/4 | 12 | 18 | 12 5/16 |
| 8 | 219.1 | 8.625 | 12 | 8 | 5 | 12 | 24 | 16 5/16 |
| 10 | 273.1 | 10.750 | 15 | 10 | 6 1/4 | 15 | 30 | 20 3/8 |
| 12 | 323.9 | 12.750 | 18 | 12 | 7 1/2 | 18 | 36 | 24 3/8 |
Duplex Steel Tees, Caps, Stub Ends and Straight Crosses
Get detailed dimensions for Duplex Steel Tees, Caps, Stub Ends, and Straight Crosses across various pipe sizes. Ensure precise fit and performance with fittings engineered for strength, durability, and corrosion resistance in critical piping systems.
|
Nominal Pipe Size |
Outside Diameter |
Caps | Straight Tees | Straight Crosses | Stub Ends | |||
| (inches) | (mm) | (inches) |
Length (inches) |
Center to End (inches) |
Center to End (inches) |
Lap Diameter (inches) |
Long Length (inches) |
Short Length (inches) |
| 1/2 | 21.3 | 0.840 | 1 | 1 | – | 1 3/8 | 3 | 2 |
| 3/4 | 26.7 | 1.050 | 1 | 1 1/8 | – | 1 11/16 | 3 | 2 |
| 1 | 33.4 | 1.315 | 1 1/2 | 1 1/2 | 1 1/2 | 2 | 4 | 2 |
| 1 1/4 | 42.2 | 1.660 | 1 1/2 | 1 7/8 | 1 7/8 | 2 1/2 | 4 | 2 |
| 1 1/2 | 48.3 | 1.900 | 1 1/2 | 2 1/4 | 2 1/4 | 2 7/8 | 4 | 2 |
| 2 | 60.3 | 2.375 | 1 1/2 | 2 1/2 | 2 1/2 | 3 5/8 | 6 | 2 1/2 |
| 2 1/2 | 73.0 | 2.875 | 1 1/2 | 3 | 3 | 4 1/8 | 6 | 2 1/2 |
| 3 | 88.9 | 3.500 | 2 | 3 3/8 | 3 3/8 | 5 | 6 | 2 1/2 |
| 3 1/2 | 101.6 | 4.000 | 2 1/2 | 3 3/4 | 3 3/4 | 5 1/2 | 6 | 3 |
| 4 | 114.3 | 4.500 | 2 1/2 | 4 1/8 | 4 1/8 | 6 3/16 | 6 | 3 |
| 5 | 141.3 | 5.563 | 3 | 4 7/8 | 4 7/8 | 7 5/16 | 8 | 3 |
| 6 | 168.3 | 6.625 | 3 1/2 | 5 5/8 | 5 5/8 | 8 1/2 | 8 | 3 1/2 |
| 8 | 219.1 | 8.625 | 4 | 7 | 7 | 10 5/8 | 8 | 4 |
| 10 | 273.1 | 10.750 | 5 | 8 1/2 | 8 1/2 | 12 3/4 | 10 | 5 |
| 12 | 323.9 | 12.750 | 6 | 10 | 10 | 15 | 10 | 6 |
Application of Duplex Steel Buttweld Fittings
Duplex Steel Buttweld Fittings are widely used across critical industries due to their exceptional mechanical strength and resistance to corrosion. In oil & gas refineries used for handling high-pressure fluids and harsh chemicals. Chemical plants rely on their resistance to pitting & stress corrosion cracking in highly reactive environments. The fertilizer industry benefits from their durability & ability to withstand acidic conditions. Marine installations used to offer excellent resistance to seawater & chloride-induced corrosion. Desalination plants use them for their high strength and long-term performance in saline conditions, while the power generation and heat exchanger sectors utilize them for their thermal stability, strength, and leak-proof welding capabilities in high-temperature systems.
Frequently Asked Questions About Duplex Steel Buttweld Fittings
What are Duplex Steel Buttweld Fittings?
These are pipe components made from duplex stainless steel designed to connect sections of pipe through butt welding. They offer excellent strength & corrosion resistance for use in demanding industrial environments.
What are the key benefits of using Duplex Steel Fittings?
They offer high mechanical strength to chloride stress corrosion, pitting & crevice corrosion to use in high pressure & corrosive applications.
What standards are followed for Duplex Steel Fittings?
Duplex fittings are manufactured to standards like ASTM A815, ASME SA815, and dimensions as per ASME B16.9 for seamless compatibility in industrial piping systems.
What grades are commonly used in Duplex Buttweld Fittings?
Common grades include UNS S31803 and UNS S32205 known for their balanced microstructure & excellent corrosion resistance.
Are custom sizes and thicknesses available?
Yes, we offer duplex steel buttweld fittings that are available in custom sizes, schedules & thicknesses as per project specifications.
What types of buttweld fittings are available in duplex steel?
The range includes elbows (short & long radius), tees (equal & unequal), reducers (concentric & eccentric), stub ends, crosses, pipe caps & bends.
Related Products
- Duplex UNS S31803 Buttweld Fittings
- Duplex UNS S32205 Buttweld Fittings
- Duplex UNS S31803 Forged Fittings
- Duplex UNS S32205 Forged Fittings
- Duplex UNS S31803 Olets
- Duplex UNS S32205 Olets
- Duplex Steel UNS S31803 Fasteners
- Duplex Steel UNS S32205 Fasteners
- Duplex UNS S31803 Instrumentation Valves
- Duplex UNS S32205 Instrumentation Valves
- Duplex UNS S32205 Plates and Duplex UNS S32205 Sheets
- Duplex UNS S31803 Perforated Sheet
- Duplex UNS S32205 Perforated Sheet
- Duplex UNS S31803 Compression Tube Fittings
- Duplex UNS S32205 Compression Tube Fittings
- Duplex UNS S31803 Wiremesh
- Duplex UNS S32205 Wiremesh
- Duplex UNS S31803 Pipe Spools
- Duplex UNS S32205 Pipe Spools
- Duplex UNS S31803 Long Radius Bends
- Duplex UNS S32205 Long Radius Bends
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