The S31803 socket-weld flange with its high strength, excellent corrosion resistance, and the compactness and ease of installation inherent in the socket-weld structure, has become a key connector in numerous fields, including the petroleum, chemical, and marine engineering industries. HT PIPE supply all different types and scales of flanges. Please feel free to contact us for further product information and pricing.
Duplex Steel S31803 pipe flange specifications
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Duplex Steel S31803 Pipe Flanges Specifications |
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Specifications |
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ASTM A182 / ASME SA182 |
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Size |
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1/8″ NB TO 24″ NB |
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Standards |
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ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
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Class / Pressure |
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150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
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Standard |
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ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
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Grades |
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S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
Uns s31803 Socket-weld Features
Compact Geometry: The pipe is inserted into the flange's socket, with fillet welds applied to the back of the pipe and flange. This design eliminates alignment issues between the flange bore and the pipe's inner diameter, facilitating installation.
Smaller Installation Space: Compared to other flanges, socket-weld flanges are more compact, making them suitable for applications with limited space.
High Structural Rigidity: The S31803 socket-weld flange with a neck offers superior rigidity and minimizes welding distortion.
Manufacturing Standards and Pressure Ratings: These primarily adhere to standards such as ANSI B16.5, HG/T 20597, and GB/T 9117.1. Socket-weld flanges are commonly used for pipes with pressures PN ≤ 10.0 MPa and DN ≤ 40.
Sealing Surface Type: Depending on the sealing requirements, raised face, concave-convex face, tongue-and-groove face, and ring-jointed face are available.
ASME b16.5 S31803 flange Mechanical Characteristics
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
|---|---|---|---|---|
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi - 80000 , MPa - 550 | Psi - 116000 , MPa - 800 | 15 % |
Duplex 2205 Material Chemical Composition
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Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
Fe |
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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 |
alloy s31803 sw flange Applications
Oil and Gas Industry: Used for process piping on offshore platforms and pipeline connections for oil and gas processing equipment, resistant to media containing chlorides, carbon dioxide, and hydrogen sulfide.
Chemical and Petrochemical Industry: Used in chemical industry equipment such as pipelines, reactors, and heat exchangers, resisting corrosion from various acids, alkalis, and salts.
Marine and Seawater Utilization: Used in desalination equipment, seawater pumps, and ship piping systems, resistant to seawater corrosion.
Energy and Environmental Protection: Used for pipe connections in corrosive environments in flue gas desulfurization systems, the energy and environmental protection industry, and the papermaking industry.
High Purity and Hygiene Applications: Used in equipment in the food and pharmaceutical industries for its corrosion resistance and cleanliness.
Class 150 S31803 Socket weld Flange size
| Size in Inch | Size in mm | Outer Dia. | Flange Thick. | Hub OD | Flange Length | RF Dia. | RF Height | Socket Depth | PCD | Socket Bore | No of Bolts | Bolt Size UNC | Machine Bolt Length | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 15 | 90 | 9.6 | 30 | 14 | 34.9 | 2 | 10 | 60.3 | 22.2 | 4 | 1/2 | 50 | 55 | 5/8 | M14 | 0.8 |
| 3/4 | 20 | 100 | 11.2 | 38 | 14 | 42.9 | 2 | 11 | 69.9 | 27.7 | 4 | 1/2 | 50 | 65 | 5/8 | M14 | 0.9 |
| 1 | 25 | 110 | 12.7 | 49 | 16 | 50.8 | 2 | 13 | 79.4 | 34.5 | 4 | 1/2 | 55 | 65 | 5/8 | M14 | 0.9 |
| 1 1/4 | 32 | 115 | 14.3 | 59 | 19 | 63.5 | 2 | 14 | 88.9 | 43.2 | 4 | 1/2 | 55 | 70 | 5/8 | M14 | 1.4 |
| 1 1/2 | 40 | 125 | 15.9 | 65 | 21 | 73 | 2 | 16 | 98.4 | 49.5 | 4 | 1/2 | 65 | 70 | 5/8 | M14 | 1.4 |
| 2 | 50 | 150 | 17.5 | 78 | 24 | 92.1 | 2 | 17 | 120.7 | 61.9 | 4 | 5/8 | 70 | 85 | 3/4 | M16 | 2.3 |
| 2 1/2 | 65 | 180 | 20.7 | 90 | 27 | 105 | 2 | 19 | 139.7 | 74.6 | 4 | 5/8 | 75 | 90 | 3/4 | M16 | 3.2 |
| 3 | 80 | 190 | 22.3 | 108 | 29 | 127 | 2 | 21 | 152.4 | 90.7 | 4 | 5/8 | 75 | 90 | 3/4 | M16 | 3.7 |
