Stainless Steel 347 Flanges are a type of stainless steel flanges stabilized by columbium/niobium, which are used in the pipes where high-temperature resistance is required and resistance to sensitization and intergranular corrosion is necessary. The addition of niobium prevents precipitation of chromium carbides in the temperature range 427°C-816°C, to make ASTM A182 F347 flanges suitable for welded structure application in refinery units, boiler systems, heat exchangers and applications for nuclear or power industry. SS 347 has higher resistance in certain high-temperature and corrosive corrosive services than SS 321 including polythionic acid stress corrosion cracking in certain corrosive service conditions. Amardeep Steel offers SS 347H and 347H Flanges in standard and custom sizes, complete with test certificates, inspection assistance, and packing for export.
What are Stainless Steel 347 Flanges?
Stainless Steel 347 Flanges are a component that is used to attach pipes, valves, and apparatus in a secure and leak-proof way in a piping framework. They are commonly used for high temperature and high pressure applications, such as power plants, chemical processing, and applications in the oil/gas industry. They are produced in different kinds like lap joint, ring type joint, threaded and plate, and are classified between Class 150, 300, 600 up to Class 2500, which indicates the strength and ability to withstand pressure in different operating conditions. It’s also important to have knowledge about SS Pipe Fittings High Temperature Industrial Applications.
Specification of Stainless Steel 347 Flanges
| Category | Specification Details |
|---|---|
| Material Standard | ASTM A182 / ASME SA182 (Forged Stainless/Alloy Steel) |
| Dimensional Standards | ANSI/ASME B16.5, B16.47 (Series A & B), B16.48, BS 4504, BS 10, EN-1092, DIN |
| Design Standards | ANSI, ASME, BS, DIN, EN Flanges |
| Size Range | 1/2″ (15 NB) to 48″ (1200 NB) |
| Pressure Ratings (Class) | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Pressure Ratings (PN) | PN6, PN10, PN16, PN25, PN40, PN64 |
| Flange Face Types | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
Chemical Composition of Stainless Steel 347 Flanges
| Grade | C | Mn | Si | P | S | Cr | Cb + Ta | Ni | Fe |
|---|---|---|---|---|---|---|---|---|---|
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10×C to 1.10 | 9.00 – 13.00 | 62.74 min |
ASTM A182 F347 Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|
| 8.0 g/cm³ | 1454 °C (2550 °F) | 75,000 Psi (515 MPa) | 30,000 Psi (205 MPa) | 35 % |
Physical and Thermal properties of SS 347 Flanges
| Property | Imperial Units | Metric / SI Units |
|---|---|---|
| Specific Heat | 0.12 BTU/lb-F at 32-212°F | 500 J/kg-K at 0-100°C |
| Modulus of Elasticity | 28.0 x 10^6 psi | 193 GPa |
| Thermal Conductivity | 133 BTU/hr/ft²/ft/°F at 212°F / 100°C | 16.3 W/m-K |
| Melting Range | 2550-2635°F | 1398-1446°C |
| Electrical Resistivity | 72 microhm-cm at 20°F | Not provided |
SS UNS S34700 Flanges Equivalent Grades
| Standard | Werkstoff Nr. | UNS | JIS | GOST | EN |
|---|---|---|---|---|---|
| SS 347 | 1.4550 | S34700 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
Different Types of Stainless Steel 347 Flanges
Size Chart of Stainless Steel 347 Flanges
| NPS | O (OD) | Q (Thk) | R (RF) | X (Hub) | Y (WN) | Y (SO/SW) | Y (Lap) | B (SO/SW) | B (Lap) | W (Bevel) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 3-1/2 | 7/16 | 1-3/8 | 1-3/16 | 1-7/8 | 5/8 | 5/8 | 0.88 | 0.90 | 0.84 |
| 3/4″ | 3-7/8 | 1/2 | 1-11/16 | 1-1/2 | 2-1/16 | 5/8 | 5/8 | 1.09 | 1.11 | 1.05 |
| 1″ | 4-1/4 | 9/16 | 2 | 1-15/16 | 2-3/16 | 11/16 | 11/16 | 1.36 | 1.38 | 1.32 |
| 1-1/4″ | 4-5/8 | 5/8 | 2-1/2 | 2-5/16 | 2-1/4 | 13/16 | 13/16 | 1.70 | 1.72 | 1.66 |
| 1-1/2″ | 5 | 11/16 | 2-7/8 | 2-9/16 | 2-7/16 | 7/8 | 7/8 | 1.95 | 1.97 | 1.90 |
| 2″ | 6 | 3/4 | 3-5/8 | 3-1/16 | 2-1/2 | 1 | 1 | 2.44 | 2.46 | 2.38 |
| 2-1/2″ | 7 | 7/8 | 4-1/8 | 3-9/16 | 2-3/4 | 1-1/8 | 1-1/8 | 2.94 | 2.97 | 2.88 |
| 3″ | 7-1/2 | 15/16 | 5 | 4-1/4 | 2-3/4 | 1-3/16 | 1-3/16 | 3.57 | 3.60 | 3.50 |
| 3-1/2″ | 8-1/2 | 15/16 | 5-1/2 | 4-13/16 | 2-13/16 | 1-1/4 | 1-1/4 | 4.07 | 4.10 | 4.00 |
| 4″ | 9 | 15/16 | 6-3/16 | 5-5/16 | 3 | 1-5/16 | 1-5/16 | 4.57 | 4.60 | 4.50 |
| 5″ | 10 | 15/16 | 7-5/16 | 6-7/16 | 3-1/2 | 1-7/16 | 1-7/16 | 5.66 | 5.69 | 5.56 |
| 6″ | 11 | 1 | 8-1/2 | 7-9/16 | 3-1/2 | 1-9/16 | 1-9/16 | 6.72 | 6.75 | 6.63 |
| 8″ | 13-1/2 | 1-1/8 | 10-5/8 | 9-11/16 | 4 | 1-3/4 | 1-3/4 | 8.72 | 8.75 | 8.63 |
| 10″ | 16 | 1-3/16 | 12-3/4 | 12 | 4 | 1-15/16 | 1-15/16 | 10.88 | 10.92 | 10.75 |
| 12″ | 19 | 1-1/4 | 15 | 14-3/8 | 4-1/2 | 2-3/16 | 2-3/16 | 12.88 | 12.92 | 12.75 |
| 14″ | 21 | 1-3/8 | 16-1/4 | 15-3/4 | 5 | 2-1/4 | 3-1/8 | 14.14 | 14.18 | 14.00 |
| 16″ | 23-1/2 | 1-7/16 | 18-1/2 | 18 | 5 | 2-1/2 | 3-7/16 | 16.16 | 16.19 | 16.00 |
| 18″ | 25 | 1-9/16 | 21 | 19-7/8 | 5-1/2 | 2-11/16 | 3-13/16 | 18.18 | 18.20 | 18.00 |
| 20″ | 27-1/2 | 1-11/16 | 23 | 22 | 5-11/16 | 2-7/8 | 4-1/16 | 20.20 | 20.25 | 20.00 |
| 24″ | 32 | 1-7/8 | 27-1/4 | 26-1/8 | 6 | 3-1/4 | 4-3/8 | 24.25 | 24.25 | 24.00 |
ASME SA182 SS 347 Flanges Weight Chart
| NPS (Pipe) | O.D. (O) | Thk. (C) | Hub (X) | RF (G) | Length (Y) | Bolt Circle (B) | Bolt Hole (BH) | No. Bolts (BN) | Bolt Size (BD) | Weight (KG) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 89.00 | 11.20 | 30.20 | 35.10 | 15.70 | 60.50 | 15.80 | 4 | 1/2″ | 0.4 |
| 3/4″ | 98.50 | 12.70 | 38.10 | 42.90 | 15.70 | 69.90 | 15.80 | 4 | 1/2″ | 0.7 |
| 1″ | 108.00 | 14.20 | 49.30 | 50.80 | 17.50 | 79.30 | 15.80 | 4 | 1/2″ | 0.8 |
| 1-1/4″ | 117.50 | 15.70 | 58.70 | 63.50 | 20.60 | 88.90 | 15.80 | 4 | 1/2″ | 1.2 |
| 1-1/2″ | 127.00 | 17.50 | 65.00 | 73.20 | 22.40 | 98.60 | 15.80 | 4 | 1/2″ | 1.5 |
| 2″ | 152.50 | 19.10 | 77.70 | 91.90 | 25.40 | 120.70 | 19.10 | 4 | 5/8″ | 2.3 |
| 2-1/2″ | 178.00 | 22.40 | 90.40 | 104.60 | 28.40 | 139.70 | 19.10 | 4 | 5/8″ | 3.7 |
| 3″ | 190.50 | 23.90 | 108.00 | 127.00 | 30.20 | 152.40 | 19.10 | 4 | 5/8″ | 4.1 |
| 3-1/2″ | 216.00 | 23.90 | 122.20 | 139.70 | 31.80 | 177.80 | 19.10 | 8 | 5/8″ | 5.1 |
| 4″ | 228.50 | 23.90 | 134.90 | 157.20 | 33.30 | 190.50 | 19.10 | 8 | 5/8″ | 5.9 |
| 5″ | 254.00 | 23.90 | 163.60 | 185.70 | 36.60 | 215.90 | 22.40 | 8 | 3/4″ | 7.0 |
| 6″ | 279.50 | 25.40 | 192.00 | 215.90 | 39.60 | 241.30 | 22.40 | 8 | 3/4″ | 8.4 |
| 8″ | 343.00 | 28.40 | 246.10 | 269.70 | 44.50 | 298.50 | 22.40 | 8 | 3/4″ | 13.0 |
| 10″ | 406.50 | 30.20 | 304.80 | 323.90 | 49.30 | 362.00 | 25.40 | 12 | 7/8″ | 18.0 |
| 12″ | 482.50 | 31.80 | 365.30 | 381.00 | 55.60 | 431.80 | 25.40 | 12 | 7/8″ | 29.0 |
| 14″ | 533.50 | 35.10 | 400.10 | 412.80 | 57.20 | 476.30 | 28.50 | 12 | 1″ | 39.0 |
| 16″ | 597.00 | 36.60 | 457.20 | 469.90 | 63.50 | 539.80 | 28.50 | 16 | 1″ | 47.0 |
| 18″ | 635.00 | 39.60 | 505.00 | 533.40 | 68.30 | 577.90 | 31.80 | 16 | 1-1/8″ | 57.0 |
| 20″ | 698.50 | 42.90 | 558.80 | 584.20 | 73.20 | 635.00 | 31.80 | 20 | 1-1/8″ | 76.0 |
| 24″ | 813.00 | 47.80 | 663.40 | 692.20 | 82.60 | 749.30 | 35.10 | 20 | 1-1/4″ | 97.0 |
Dimensions Chart of SS DIN 1.4550 Flanges
| Standard | Class / Table | Diameter (mm) | Bolt Circle Diameter (mm) | Number of Bolts | Bolt Size | Bolt Hole Diameter (mm) |
|---|---|---|---|---|---|---|
| AS4087 | PN14 | 95 | 67 | 4 | M12 | 14 |
| AS 2129 | Table C | 95 | 67 | 4 | 13 | 14 |
| Table D | 95 | 67 | 4 | 13 | 14 | |
| Table E | 95 | 67 | 4 | 13 | 14 | |
| Table F | 95 | 67 | 4 | 13 | 14 | |
| Table H | 114 | 83 | 4 | 16 | 17 | |
| Table J | 114 | 83 | 4 | 16 | 17 | |
| ANSI B16.5 | ANSI 150 | 89 | 60 | 4 | 13 | 16 |
| ANSI 300 | 95 | 67 | 4 | 13 | 16 | |
| ANSI 600 | 95 | 67 | 4 | 13 | 16 | |
| ANSI 900 | 121 | 83 | 4 | 19 | 22 | |
| ANSI 1500 | 121 | 83 | 4 | 19 | 22 | |
| ISO 7005 (DIN) | PN6 | 80 | 55 | 4 | M10 | 11 |
| PN10 | 95 | 65 | 4 | M12 | 14 | |
| PN16 | 95 | 65 | 4 | M12 | 14 | |
| PN20 | 90 | 60.5 | 4 | M14 | 16 | |
| PN25 | 95 | 65 | 4 | M12 | 14 | |
| PN40 | 95 | 65 | 4 | M12 | 14 |
Pressure Rating Chart of Stainless Steel 347 Flanges
| Temperature (°F) | 150# | 300# | 400# | 600# | 900# | 1500# | 2500# |
|---|---|---|---|---|---|---|---|
| -20 to 100 | 275 | 720 | 960 | 1440 | 2160 | 3600 | 6000 |
| 200 | 230 | 600 | 800 | 1200 | 1800 | 3000 | 5000 |
| 300 | 205 | 540 | 720 | 1080 | 1620 | 2700 | 4500 |
| 400 | 190 | 495 | 660 | 995 | 1490 | 2485 | 4140 |
| 500 | 170 | 465 | 620 | 930 | 1395 | 2330 | 3880 |
| 600 | 140 | 435 | 580 | 875 | 1310 | 2185 | 3640 |
| 650 | 125 | 430 | 575 | 860 | 1290 | 2150 | 3580 |
| 700 | 110 | 425 | 565 | 850 | 1275 | 2125 | 3540 |
| 750 | 95 | 415 | 555 | 830 | 1245 | 2075 | 3460 |
| 800 | 80 | 405 | 540 | 805 | 1210 | 2015 | 3360 |
| 850 | 65 | 395 | 530 | 790 | 1190 | 1980 | 3300 |
| 900 | 50 | 390 | 520 | 780 | 1165 | 1945 | 3240 |
| 950 | 35 | 380 | 510 | 765 | 1145 | 1910 | 3180 |
| 1000 | 20 | 320 | 430 | 640 | 965 | 1605 | 2675 |
| 1050 | 20 | 310 | 410 | 615 | 925 | 1545 | 2570 |
| 1100 | 20 | 255 | 345 | 515 | 770 | 1285 | 2145 |
| 1150 | 20 | 200 | 265 | 400 | 595 | 995 | 1655 |
| 1200 | 20 | 155 | 205 | 310 | 465 | 770 | 1285 |
| 1250 | 20 | 115 | 150 | 225 | 340 | 565 | 945 |
| 1300 | 20 | 85 | 115 | 170 | 255 | 430 | 715 |
| 1350 | 20 | 60 | 80 | 125 | 185 | 310 | 515 |
| 1400 | 20 | 50 | 65 | 95 | 145 | 240 | 400 |
| 1450 | 15 | 35 | 45 | 70 | 105 | 170 | 285 |
| 1500 | 10 | 25 | 35 | 55 | 80 | 135 | 230 |
Stainless Steel 347 Flanges Price List
| Flange Type / Description | Price in India (INR) | Price in UAE (AED) |
|---|---|---|
| SS ASTM A182 F347 Flanges (Standard List) | ₹2,480.51 | 128.60 AED |
| ASTM A182 Gr F347 Blind Flanges | ₹850.46 | 44.09 AED |
| ASTM A182 Grade F347 Pipe Flanges | ₹1,417.44 | 73.49 AED |
| 347 Stainless Steel Flange (Mumbai Market) | ₹4,252.31 | 220.46 AED |
| ASTM A182 347 SS Pipe Flanges (Mumbai) | ₹1,771.79 | 91.86 AED |
Related Products
- Stainless Steel 304 Flanges
- Stainless Steel 304L Flanges
- Stainless Steel 304H Flanges
- Stainless Steel 310 Flanges
- Stainless Steel 310S Flanges
- Stainless Steel 316 Flanges
- Stainless Steel 316L Flanges
- Stainless Steel 316H Flanges
- Stainless Steel 317 Flanges
- Stainless Steel 317L Flanges
- Stainless Steel 321 Flanges
- Stainless Steel 321H Flanges
- Stainless Steel 347 Flanges
- Stainless Steel 347H Flanges
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Frequently Asked Questions
What is Stainless Steel 347 flange?
A Stainless Steel 347 flange is a pipe fitting made from niobium (columbium) stabilized stainless steel, designed for high-temperature applications with excellent resistance to intergranular corrosion.
What is ASTM A182 F347 flange specification?
ASTM A182 F347 is a standard for forged stainless steel flanges used in high-temperature and corrosion-resistant applications, ensuring strength, durability, and stability during welding.
What is UNS S34700 material?
UNS S34700 is the material designation for Stainless Steel 347, known for niobium stabilization, high-temperature strength, and resistance to sensitization.
What is DIN 1.4550 equivalent of SS 347?
DIN 1.4550 is the European equivalent grade of Stainless Steel 347, offering similar composition and corrosion-resistant properties.
What are the properties of SS 347 flanges?
SS 347 flanges offer high-temperature strength, excellent corrosion resistance, resistance to sensitization, good weldability, and stability due to niobium (columbium) addition.
