Duplex UNS S31803 Buttweld Fittings are cost-effective solutions for connecting pipes, valves, and other components. Manufactured from duplex stainless steel with superior corrosion resistance properties compared to ordinary austenitic materials, these fittings offer excellent strength and durability. Their high corrosion resistance is achieved by combining chromium, molybdenum, and nitrogen, providing them with higher alloying elements than standard austenitic alloys. In addition, they also have enhanced pitting and crevice corrosion resistance compared to conventional austenitic stainless steels.
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These buttweld fittings come in various shapes, such as elbow, tee, reducer, and cross. They are available in different sizes and schedules, making them suitable for multiple applications. They have an ideal surface finish for welding and are designed precisely to provide a perfect fit. These fittings also comply with various international standards and can be used in temperatures up to 600°F (316°C).
Due to their excellent mechanical properties, high corrosion resistance, and cost-effectiveness, DUPLEX UNS S31803 Buttweld Fittings are widely used in various industries, including oil & gas, water treatment plants, chemical processing, power generation, pulp & paper production, and food & beverage manufacturing. To ensure optimal performance, it is essential to check the quality of the material before installation. For reliable results, you should always choose reputable manufacturers that offer superior quality duplex stainless steel butt weld fittings. With the right product, you can be sure your piping system will be safe and reliable.
Palgotta Metal Pvt Ltd is a leading precision metal parts and components manufacturer. The company provides customers custom-made parts and components designed for their needs and applications. We are committed to providing our clients superior customer service and quality products. Our experienced professionals are dedicated to delivering components that meet the customer’s exact specifications. We utilize advanced manufacturing techniques and technology to create parts with high dimensional accuracy, uniformity, and strength.
What are S31803 Duplex Steel Butt weld Fittings?
Duplex S31803 Pipe Fittings are piping components made from duplex stainless steel S31803, used to connect two or more pipes together. They are designed to be welded directly to the pipes, creating a leak-proof connection. They are commonly used in chemical processing, oil and gas, and marine engineering due to their strength, toughness, and corrosion resistance.
What is the difference between S31803 and S32205 Butt weld Fittings?
The main difference between the two grades is their chemical composition. S32205 has a slightly higher amount of chromium and molybdenum, giving it improved corrosion resistance and higher strength than Duplex S31803 Butt weld Fittings. However, both grades are suitable for use in harsh environments such as chemical processing, oil and gas, and marine engineering. The choice between the two grades depends on the specific application and the required properties.
STANDARD | WERKSTOFF NR. | UNS / Grades |
ASTM A815 / ASME SA815 | 1.4462 | S31803 (F51) S32205 (F60) |
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 |
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 |
ASME b16.9 Fittings Normal Pipe Size |
ANSI b16 9 Pipe Fitting O D Y |
Wall Thickness
T (Pipe Elbow Sch.) |
LR 45 Deg Elbows Centre to Face B | SR 45 Deg Elbows Weight |
LR 90 Deg Elbows Centre to Face A | LR 90 Deg Elbows Weight In Below | SR 90 Deg Elbows Centre to Face A | SR 90 Deg Elbows Weight In Below | ||
millimeter | inch. | millimeter | millimeter | Schedule | millimeter | kilogram | millimeter | kilogram | millimeter | kilogram |
15 | 1/2” | 21.3 | 2.78 | STD | 15.9 | 0.04 | 38.1 | 0.08 | – | – |
3.73 | X.S | 15.9 | 0.05 | 38.1 | 0.10 | – | – | |||
20 | 3/4” | 26.7 | 2.87 | STD | 11.1 | 0.04 | 28.6 | 0.08 | – | – |
3.91 | X.S | 11.1 | 0.05 | 28.6 | 0.11 | – | – | |||
25 | 1” | 33.4 | 3.38 | STD | 22.2 | 0.09 | 38.1 | 0.15 | 25.4 | 0.11 |
4.55 | X.S | 22.2 | 0.11 | 38.1 | 0.19 | 25.4 | 0.14 | |||
32 | 11/4” | 42.2 | 3.56 | STD | 25.4 | 0.14 | 47.6 | 0.28 | 31.75 | 0.18 |
4.85 | X.S | 25.4 | 0.2 | 47.6 | 0.39 | 31.75 | 0.24 | |||
40 | 11/2” | 48.3 | 3.68 | STD | 28.6 | 0.2 | 57.1 | 0.4 | 38.1 | 0.26 |
5.08 | X.S | 28.6 | 0.25 | 57.1 | 0.5 | 38.1 | 0.35 | |||
50 | 2” | 60.3 | 3.91 | STD | 34.9 | 0.36 | 76.2 | 0.72 | 50.8 | 0.5 |
5.54 | X.S | 34.9 | 0.5 | 76.2 | 1.0 | 50.8 | 0.68 | |||
65 | 21/2” | 73.0 | 5.16 | STD | 44.4 | 0.73 | 95.2 | 1.46 | 63.5 | 0.95 |
7.01 | X.S | 44.4 | 0.91 | 95.2 | 1.82 | 63.5 | 1.27 | |||
80 | 3” | 88.9 | 5.49 | STD | 50.8 | 1.1 | 114.3 | 2.18 | 76.2 | 1.45 |
7.62 | X.S | 50.8 | 1.45 | 114.3 | 2.86 | 76.2 | 1.95 | |||
100 | 4” | 114.3 | 6.02 | STD | 63.5 | 2.1 | 152.4 | 4.2 | 101.6 | 2.8 |
8.56 | X.S | 63.5 | 2.9 | 152.4 | 5.7 | 101.6 | 3.9 | |||
125 | 5” | 141.3 | 6.65 | STD | 79.4 | 3.4 | 190.0 | 6.8 | 127.0 | 4.8 |
9.5 | X.S | 79.4 | 5.0 | 190.0 | 10.0 | 127.0 | 6.5 | |||
150 | 6” | 168.3 | 7.11 | STD | 95.2 | 5.1 | 229.0 | 10.1 | 152.4 | 6.8 |
10.97 | X.S | 95.2 | 7.7 | 229.0 | 15.3 | 152.4 | 10.2 | |||
200 | 8” | 219.1 | 8.18 | STD | 127.0 | 10.2 | 305.0 | 20.4 | 203.0 | 13.6 |
12.7 | X.S | 127.0 | 15.5 | 305.0 | 30.9 | 203.0 | 20.9 | |||
250 | 10” | 273.9 | 9.27 | STD | 159.0 | 18.1 | 381.0 | 36.1 | 254.0 | 24.1 |
12.7 | X.S | 159.0 | 24.4 | 381.0 | 48.8 | 254.0 | 32.5 | |||
300 | 12” | 323.9 | 9.52 | STD | 190.0 | 26.6 | 457.0 | 53.1 | 305.0 | 35.4 |
12.7 | X.S | 190.0 | 35.0 | 457.0 | 70.0 | 305.0 | 46.7 | |||
350 | 14” | 355.6 | 9.52 | STD | 222.0 | 34.1 | 533.0 | 68.1 | 356.0 | 45.4 |
12.7 | X.S | 222.0 | 45.0 | 533.0 | 90.0 | 356.0 | 60.0 | |||
400 | 16” | 406.4 | 9.52 | STD | 254.0 | 45.0 | 610.0 | 89.3 | 406.0 | 59.5 |
12.7 | X.S | 254.0 | 59.0 | 610.0 | 118.0 | 406.0 | 78.7 | |||
450 | 18” | 457.0 | 9.52 | STD | 286.0 | 56.5 | 686.0 | 113.0 | 457.0 | 75.6 |
12.7 | X.S | 286.0 | 75.0 | 686.0 | 150.0 | 457.0 | 100.0 | |||
500 | 20” | 508.0 | 9.52 | STD | 318.0 | 85.0 | 762.0 | 140.0 | 508.0 | 93.5 |
12.7 | X.S | 318.0 | 112.5 | 762.0 | 186.0 | 508.0 | 124.0 | |||
600 | 24” | 610.00 | 9.52 | STD | 381.0 | 101.5 | 914.0 | 203.0 | 610.0 | 135.0 |
12.7 | X.S | 381.0 | 134.5 | 914.0 | 269.0 | 610.0 | 179.0 |
BW Fittings ANSI B16.9 Tolerance (45 And 90 degree) Elbow, End Cap, Tee, Reducer) | 90 Deg. & 45 Deg. Elbow and Tee |
Reducer & Long Lap Joint Stub End |
Cap | |||
Fitting Dimension (NPS) | Outside Daimeter Diameter at Bevel |
Inside Diameter at End |
Wall Thick T | Center-to-End Dimension A ,C ,B |
Over-all Length H |
Over-all Length F |
1/2 to 2-1/2 | +0.06 | Not less than 87.5% of nominal Thickness |
+/- 0.06 | +/- 0.06 | +/- 0.12 | |
-0.03 | ||||||
3 to 3-1/2 | +/- 0.06 | +/- 0.06 | +/- 0.06 | +/- 0.06 | +/- 0.12 | |
4 | +/- 0.06 | +/- 0.06 | +/- 0.06 | +/- 0.06 | +/- 0.12 | |
5 to 8 | +/- 0.06 | +/- 0.06 | +/- 0.06 | +/- 0.06 | +/- 0.25 | |
10 to 18 | +0.16 | +/- 0.12 | +/- 0.09 | +/- 0.09 | +/- 0.25 | |
-0.12 | ||||||
20 to 24 | +0.25 | +/- 0.19 | +/- 0.09 | +/- 0.09 | +/- 0.25 | |
-0.19 | ||||||
26 to 30 | +0.25 | +/- 0.19 | +/- 0.12 | +/- 0.19 | +/- 0.38 | |
-0.19 | ||||||
32 to 48 | +0.25 | +/- 0.19 | +/- 0.19 | +/- 0.19 | +/- 0.38 | |
-0.19 |
NPS (Normal Pipe Size) | O.D. (Outside Diameter) | Ave. I.D. (Inside Diameter) |
Mani. WALL |
Normal Weight |
Maxi. W.P. psi |
1/4" | .540 | .282 | .119 | .105 | 1130 |
3/8" | .675 | .403 | .126 | .146 | 920 |
1/2" | .840 | .526 | .147 | .213 | 850 |
3/4" | 1.050 | .722 | .154 | .289 | 690 |
1" | 1.315 | .936 | .179 | .424 | 630 |
1-1/4" | 1.660 | 1.255 | .191 | .586 | 520 |
1-1/2" | 1.900 | 1.476 | .200 | .711 | 470 |
2" | 2.375 | 1.913 | .218 | .984 | 400 |
2-1/2" | 2.875 | 2.290 | .276 | 1.500 | 420 |
3" | 3.500 | 2.864 | .300 | 2.010 | 370 |
3-1/2" | 4.000 | 3.326 | .318 | 2.452 | 350 |
4" | 4.500 | 3.786 | .337 | 2.938 | 320 |
5" | 5.563 | 4.768 | .375 | 4.078 | 290 |
6" | 6.625 | 5.709 | .432 | 5.610 | 280 |
8" | 8.625 | 7.565 | .500 | 8.522 | 250 |
10" | 10.750 | 9.493 | .593 | 12.635 | 230 |
12" | 12.750 | 11.294 | .687 | 17.384 | 230 |
14" | 14.000 | 12.410 | .750 | 20.852 | 220 |
16" | 16.000 | 14.213 | .843 | 26.810 | 220 |
18" | 18.000 | 16.014 | .937 | 33.544 | 220 |
20" | 20.000 | 17.814 | 1.031 | 41.047 | 220 |
24" | 24.000 | 21.418 | 1.218 | 58.233 | 210 |
ASME B16.9 Fittings | Factory-Made Wrought Buttwelding Fittings | Long Radius Elbows, Long Radius Reducing Elbows, Long Radius Returns, Short Radius Elbows, Short Radius 180-deg Rerurns, 3D elbows, Straight Tees, Straight Crosses, Reducing Tees, Crosses, Lap Joint Stub Ends, Caps, Reducers |
ASME B16.28 | Short Radius Elbows, Short Radius 180-deg Returns | |
MSS SP43 | Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications | Long Radius Elbows, Straight and Reducing-on-the-Outlet Tees, Lap Joint Stub ends, caps, long radius 180 Degree returns, concentric reducers, eccentric reducers |
MSS SP75 | Long Radius Elbows, 3R elbows, straight tees, reducing outlet tees, caps, reducers |
Pressure-Temperature ratings for ASME B16.9 Buttweld fittings (psig) | |||||
---|---|---|---|---|---|
Temperature Ratings | Pressure Class | ||||
150 | 300 | ||||
1/4 - 1 inch. | 1 1/4 - 2 inch. | 2 1/2 - 3 inch. | |||
(oF) | (oC) | ||||
-20 to 150 | -29 to 66 | 300 | 2000 | 1500 | 1000 |
200 | 93 | 265 | 1785 | 1350 | 910 |
250 | 121 | 225 | 1575 | 1200 | 825 |
300 | 149 | 185 | 1360 | 1050 | 735 |
350 | 177 | 150 | 1150 | 900 | 650 |
400 | 204 | - | 935 | 750 | 560 |
450 | 232 | - | 725 | 600 | 475 |
500 | 260 | - | 510 | 450 | 385 |
550 | 288 | - | 300 | 300 | 300 |
Duplex Steel S32205 Buttweld Pipe Fittings Suppliers | Duplex Steel F51 Seamless Pipe Fittings Stockists | Duplex Steel F60 Buttweld Fittings Latest Price | Duplex Stainless Steel S32205 Pipe Fittings Exporters | Duplex S31803 Fittings Manufacturers | Duplex Steel S31803 Butt weld Fittings | Supplier of Duplex Steel EN 1.4462 Pipe Fittings.
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