Alpha Overseas is a well-known producer of Alloy Steel F91 Flanges in various sizes and may also use at higher temperatures. These Alloy Steel F91 Flanges' energy consumption has lately dropped due to technological advancements and energy-saving practices. Even if our inventory is already considered among the best, we constantly expand and improve to match the highest standards. The Alloy Steel F91 Flanges materials are all of the highest calibers and come from trusted worldwide suppliers.
Alloy Steel F91 Flanges are used in nuclear power plants and other power plant industries. They are mostly assembled of chrome-moly alloy. Although this alloy is more robust and complex than standard steel, it does not have as high a level of corrosion resistance as stainless steel. These alloy steel are produced by ASME and ASTM standards. Custom sizes and shapes are available for these alloy steel flanges. Products are tested on many criteria for customers and delivered with the appropriate test certifications.
Alloy Steel F91 Pipe Flanges, CrMo F91 Flange, Alloy Steel A182 F91 Flange, F91 Cr-Mo Material Weld Neck Flange, F91 Alloy Steel Flanges, Chromium Molybdenum ASTM A182 F91 Flanges Suppliers, A182 F91 Alloy Steel Flange, UNS K90901 Slip On Flange, Alloy Steel F91 Flanges Manufacturers in India.
Features of Alloy Steel F91 Flanges:
Alloy Steel F91 Flanges can be bent with a bespoke bending angle of 10 degrees to 180 degrees and a bending radius ranging from 1D to 10D. These Alloy Steel F91 Flanges, which are seamless and weldable, adhere to industry standards. The flanges are available in seamless, welded, fabricated, and welded forms, and these size ranges are defined as "1/2 to 48 NB". These Alloy Steel F91 Flanges come in sizes ranging from "1/2 to 36 NB" and have pressure ratings from class 150 to 1500.
Some more typical applications for Alloy Steel F91 Flanges include
» power production.» Apparatus for treating gas.
» Oil services.
» Petroleum refineries.
» Heaters/reheating systems.
» Boilers.
F91 Alloy Steel Flanges Equivalent Grades
| STANDARD | UNS | WERKSTOFF NR. |
| Alloy Steel F91 | K90901 | 1.4903 |
Alloy Steel F91 Flange Dimensions
| NPS (in.) |
Alloy Steel F91 Flange Dimensions | ||||
|---|---|---|---|---|---|
| Dia. of Flange (in.) |
No. of Bolts |
Dia. of Bolts (in.) |
Dia. of Bolt Holes (in.) |
Bolt Circle (in.) |
|
| 1/4 | 3-3/8 | 4 | 1/2 | 0.62 | 2-1/4 |
| 1/2 | 3-1/2 | 4 | 1/2 | 0.62 | 2-3/8 |
| 3/4 | 3-7/8 | 4 | 1/2 | 0.62 | 2-3/4 |
| 1 | 4-1/4 | 4 | 1/2 | 0.62 | 3-1/8 |
| 1-1/4 | 4-5/8 | 4 | 1/2 | 0.62 | 3-1/2 |
| 1-1/2 | 5 | 4 | 1/2 | 0.62 | 3-7/8 |
| 2 | 6 | 4 | 5/8 | 0.75 | 4-3/4 |
| 2-1/2 | 7 | 4 | 5/8 | 0.75 | 5-1/2 |
| 3 | 7-1/2 | 4 | 5/8 | 0.75 | 6 |
| 3-1/2 | 8-1/2 | 8 | 5/8 | 0.75 | 7 |
| 4 | 9 | 8 | 5/8 | 0.75 | 7-1/2 |
| 5 | 10 | 8 | 3/4 | 0.88 | 8-1/2 |
| 6 | 11 | 8 | 3/4 | 0.88 | 9-1/2 |
| 8 | 13-1/2 | 8 | 3/4 | 0.88 | 11-3/4 |
| 10 | 16 | 12 | 7/8 | 1 | 14-1/4 |
| 12 | 19 | 12 | 7/8 | 1 | 17 |
| 14 | 21 | 12 | 1 | 1.12 | 18-3/4 |
| 16 | 23-1/2 | 16 | 1 | 1.12 | 21-1/4 |
| 18 | 25 | 16 | 1-1/8 | 1.25 | 22-3/4 |
| 20 | 27-1/2 | 20 | 1-1/8 | 1.25 | 25 |
| 24 | 32 | 20 | 1-1/4 | 1.38 | 29-1/2 |
Alloy Steel F91 Flanges Weight Chart
| Pipe Normal Diameter (inch) | Outer diameter Flange | Thicjness Of Flange Minimum | Diameter of Hub |
Diameter of Raised Face | Length Hub.Y | Thread Length | Diameter of Bolt Circle |
Diameter of Bolt Holes |
Number of Bolts |
Diameter of Bolts (inch) |
KG | LB | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" | 15 | 89.00 | 11.20 | 30.20 | 35.10 | 15.70 | 15.70 | 60.50 | 15.80 | 4 | 1/2" | 0.4 | 0.9 |
| 3/4" | 20 | 98.50 | 12.70 | 38.10 | 42.90 | 15.70 | 15.70 | 69.90 | 15.80 | 4 | 1/2" | 0.7 | 1.5 |
| 1" | 25 | 108.00 | 14.20 | 49.30 | 50.80 | 17.50 | 17.50 | 79.30 | 15.80 | 4 | 1/2" | 0.8 | 1.8 |
| 1-1/4" | 32 | 117.50 | 15.70 | 58.70 | 63.50 | 20.60 | 20.60 | 88.90 | 15.80 | 4 | 1/2" | 1.2 | 2.6 |
| 1-1/2" | 40 | 127.00 | 17.50 | 65.00 | 73.20 | 22.40 | 22.40 | 98.60 | 15.80 | 4 | 1/2" | 1.5 | 3.3 |
| 2" | 50 | 152.50 | 19.10 | 77.70 | 91.90 | 25.40 | 25.40 | 120.70 | 19.10 | 4 | 5/8" | 2.3 | 5.1 |
| 2-1/2" | 65 | 178.00 | 22.40 | 90.40 | 104.60 | 28.40 | 28.40 | 139.70 | 19.10 | 4 | 5/8" | 3.7 | 8.1 |
| 3" | 80 | 190.50 | 23.90 | 108.00 | 127.00 | 30.20 | 30.20 | 152.40 | 19.10 | 4 | 5/8" | 4.1 | 9 |
| 3-1/2" | 90 | 216.00 | 23.90 | 122.20 | 139.70 | 31.80 | 31.80 | 177.80 | 19.10 | 8 | 5/8" | 5.1 | 11.2 |
| 4" | 100 | 228.50 | 23.90 | 134.90 | 157.20 | 33.30 | 33.30 | 190.50 | 19.10 | 8 | 5/8" | 5.9 | 13 |
| 5" | 125 | 254.00 | 23.90 | 163.60 | 185.70 | 36.60 | 36.60 | 215.90 | 22.40 | 8 | 3/4" | 7 | 15.4 |
| 6" | 150 | 279.50 | 25.40 | 192.00 | 215.90 | 39.60 | 39.60 | 241.30 | 22.40 | 8 | 3/4" | 8.4 | 18.5 |
| 8" | 200 | 343.00 | 28.40 | 246.10 | 269.70 | 44.50 | 44.50 | 298.50 | 22.40 | 8 | 3/4" | 13 | 28.6 |
| 10" | 250 | 406.50 | 30.20 | 304.80 | 323.90 | 49.30 | 49.30 | 362.00 | 25.40 | 12 | 7/8" | 18 | 39.5 |
| 12" | 300 | 482.50 | 31.80 | 365.30 | 381.00 | 55.60 | 55.60 | 431.80 | 25.40 | 12 | 7/8" | 29 | 64 |
| 14" | 350 | 533.50 | 35.10 | 400.10 | 412.80 | 57.20 | 57.20 | 476.30 | 28.50 | 12 | 1" | 39 | 86 |
| 16" | 400 | 597.00 | 36.60 | 457.20 | 469.90 | 63.50 | 63.50 | 539.80 | 28.50 | 16 | 1" | 47 | 103 |
| 18" | 450 | 635.00 | 39.60 | 505.00 | 533.40 | 68.30 | 68.30 | 577.90 | 31.80 | 16 | 1 1/8" | 57 | 126 |
| 20" | 500 | 698.50 | 42.90 | 558.80 | 584.20 | 73.20 | 73.20 | 635.00 | 31.80 | 20 | 1 1/8" | 76 | 167 |
| 24" | 600 | 813.00 | 47.80 | 663.40 | 692.20 | 82.60 | 82.60 | 749.30 | 35.10 | 20 | 1 1/4" | 97 | 214 |
Alloy Steel 1.4903 Flanges Types
Alloy Steel F91 Slip On Flange
- Alloy Steel A182 F91 Flat Face Slip On Flanges
- F91 Chromium Moly Steel SORF Flange
- UNS K90901 Slip-On Flange
- A182 F91 Pipe Slip On Flange
- Alloy Steel 1.4903 Slip On Raised Face Flange
- Alloy Steel F91 Raised Face Slip On Flange
- ASTM A182 SORTJ
- F91 CrMo SO Flanges
- F91 Cr-Mo RFSO Flanges
- F91 Chrome Molybdenum FFSO Flanges
- ASTM A182 GR F91 Slip On Pipe Flange
- PN16 Slip On Flange Alloy Steel F91
- ASTM A182 F91 Alloy Steel SOFF Flange
Alloy Steel F91 Weld Neck Flange
- ASTM A182 F91 Welding Neck Flanges
- Alloy Steel F91 Weld Neck Flanges ANSI B16.5
- UNS K90901 Weld Neck Flanges
- F91 Chrome Molybdenum Raised Face Weld Neck Flange
- A182 F91 Cr-Mo RFWN Flange
- Alloy Steel F91 WNRTJ Flange
- ASTM A182 Alloy Steel F91 Weld Neck Flange 300
- ASME SA182 F91 Welding Neck Flanges 150#
- WERKSTOFF NR. 1.4903 WNRF Flanges
- F91 CrMo Weld Neck Flanges
- Alloy Steel F91 Flat Face Weld Neck Flange
- Chromium Moly Steel A182 F91 WNFF Flangs
Alloy Steel F91 Blind Flange
- ASME B16.5 Alloy Steel F91 Blind Raised Face Flange
- ASTM A182 F91 Cr-Mo Blind Pipe Flanges
- ASME SA 182 CrMo F91 Blind Flanges
- UNS K90901 BLFF Flanges
- Chromium Molybdenum ASTM A182 F91 Blind Plate Flanges
- Alloy Steel F91 BLFF Flanges
- SA182 Alloy Steel F91 BL Flange
- Alloy Steel F91 BLRF Flange
- A182 F91 Cr-Mo Pipe Blind Flange
- ASTM A182 F91 BLRTJ Flange
- Alloy Steel 1.4903 RTJ Blind Flange
- F91 Alloy Steel BLRTJ Flange
Alloy Steel F91 Threaded Flange
- Alloy Steel F91 3 inch Threaded Pipe Flanges
- UNS K90901 Reducing Threaded Flange
- Alloy Steel F91 Raised Face Threaded Flange
- CrMo F91 Female Threaded Flange
- ASTM A182 F91 Threaded Flanges
- F91 Alloy Steel Male Threaded Flange
- ASTM A182 F91 Alloy Steel NPT Threaded Flange
- ASTM A182 F91 Alloy Steel Thread Flange
- Chromium Moly Steel A182 F91 Threaded Pipe Flange
- ASME SA182 A182 F91 Cr-Mo Screwed Flanges
- SA182 Alloy Steel Grade F91 Threaded Flange
Alloy Steel F91 Socket weld Flange
- Alloy Steel Grade F91 Socket Welding Flange
- Chromium Moly Steel A182 F91 Raised Face Socket Weld Flanges
- Chromium Molybdenum ASTM A182 F91 Socket Weld Pipe Flange
- Alloy Steel 1.4903 SWFF Flanges
- ASME SA182 F91 Flat Face Socket Weld Flange
- UNS K90901 Socket Weld Raised Face Flange
- A182 F91 Cr-Mo RFSW Flanges
- F91 Alloy Steel 300# Socket Weld Flange
- ASME B16.5 Alloy Steel F91 SW Flange
- ASME SA182 F91 CrMo Flange sw rf
- Alloy Steel F91 SWRF Flanges
- Alloy Steel F91 SWRTJ Flanges
Alloy Steel F91 Long Weld Neck Flange
- ASME SA182 F91 Long Welding Neck Flanges
- ASME B16.5 Alloy Steel F91 Long Weld Neck Flanges
- UNS K90901 LWN Flange
- ASTM A182 F91 LWN Flanges
- Chromium Moly Steel A182 F91 Long Weld Neck Raised Face Flange
- ASTM A182 F91 Cr-Mo Long Welding Neck Flange
- ASTM A182 F91 Alloy Steel LWNRF Flanges
- Alloy Steel F91 RFLWN Flange
- F91 CrMo Raised Face Long Weld Neck Flange
Alloy Steel F91 Lap Joint Flange
- Alloy Steel F91 LJ Flanges
- F91 Chromium Molybdenum Lap Joint Flange with stub end
- UNS K90901 Lap Joint Pipe Flange
- ASTM A182 F91 CrMo Flat Face Lap Joint Flange
- ASME SA182 F91 Alloy Steel LJ Flanges
- ASTM A182 F91 Flange Lap Joint
- Chromium Moly Steel A182 F91 LJRF Flanges
- ASTM A182 Alloy Steel F91 Lap Joint Flange
- ASTM A182 F91 Alloy Steel Raised Face Lap Joint Flange
- ANSI B16.5 Alloy Steel F91 Lapped Joint Flange
- Alloy Steel A182 F91 LJFF Flange
- Cr-Mo F91 Flange Lap Joint Stub End
Alloy Steel F91 Plate Flange
- ASTM A182 F91 CrMo Plate Flanges
- ASTM A182 Alloy Steel F91 Plate Flange
- Alloy Steel F91 ANSI B16.5 Plate Flanges
- UNS K90901 Plate Flanges
- Alloy Steel F91 din 2501 pn10 plate flange
- ASTM A182 F91 Alloy Steel Plate Flange
- ASME SA182 F91 Cr-Mo Plate Flange en 1092
- Chrome Molybdenum F91 Plate Flange
- Alloy Steel F91 Plate Flanges Class 150
- Alloy Steel 1.4903 Plate Flanges
- Chromium Moly Steel A182 F91 Plate Flanges
Alloy Steel F91 Orifice Flange
- Alloy Steel 1.4903 Orifice Flanges
- ASTM A182 F91 Orifice Pipe Flange
- Alloy Steel F91 ASME B16.36 Orifice Flange
- F91 Cr-Mo Orifice Flanges
- Alloy Steel F91 Orifice Plate Flange
- ASME SA182 F91 RTJ Orifice Flange
- Chromium Moly Steel A182 F91 Orifice Flanges
- ANSI B16.36 Alloy Steel F91 Orifice Flanges
- SA 182 CrMo F91 Orifice Flanges
- UNS K90901 Steel Orifice Flanges
- F91 Alloy Steel Class 150 Orifice Flange
- ASTM A182 Alloy Steel F91 Raised Face Orifice Flanges
Specialized in Following ASTM A182 F91 Alloy Steel Flanges
- F91 Cr-Mo Flange Manufacturer in Mumbai
- UNS K90901 Large Diameter Flange
- Alloy Steel F91 Flanges Suppliers in India
- Alloy Steel 1.4903 Spacer Ring Flanges
- AS ASTM A182 F91 Large Tongue Flange Stock
- Type F91 CrMo Loose Plate Flange
- ASME SA182 F91 Flat Face Flanges
- Alloy Steel A182 F91 Forged Flanges
- F91 Alloy Steel Flange Manufacturer
- ASTM A182 Alloy Steel F91 Flange Suppliers
- ASTM A182 F91 CrMo Flanges
- Manufacturer of Alloy Steel F91 Flanges
- ASTM A182 F91 Alloy Steel Flange
- ASTM A182 Alloy Steel F91 Paddle Blank and Spacer
- Chrome Molybdenum F91 Industrial Pipe Flange
- ANSI/ASME B16.5 F91 Alloy Steel Flange Supplier in Mumbai
- Grade F91 Alloy Steel Slip On Plate Flange
- Chromium Moly Steel A182 F91 Groove Flange
- ASME B16.5 CrMo F91 Pipe Flange Spacer Ring
- Alloy Steel A182 F91 NPT Flanges
- ASTM A182 CrMo F91 Nipoflange
- ASTM A182 F91 CrMo Flanges at Best Price List In India
- ASTM A182 Alloy Steel F91 Paddle Blind Flange
- Chromium Molybdenum F91 Flat Face Flange
- Chromium Moly Steel A182 F91 Flanges Stockist
- Alloy Steel F91 Reducing Flange
- Supplier of A182 F91 Cr-Mo Slip On Flat Face Flange
- ASME SA182 Alloy Steel F91 RTJ Flange Exporter
- F91 Alloy Steel Flangeolet
- F91 Alloy Steel Flange Pressure Rating
- ASTM A182 Alloy Steel F91 Flanges
- F91 Alloy Steel Custom Flanges
- ASME SA182 F91 Exhaust Flanges
- SA182 F91 Alloy Steel Raised Face Flange
- F91 Alloy Steel Spectacle Blind Flanges
- Alloy Steel A182 F91 Tongue and Groove Flanges Dealers
- Alloy Steel F91 Ring Type Joint Flanges
- Cr-Mo Grade F91 Blind Spectacle Flange
UNS K90901 Flange Pressure Rating Chart
| ASME | Pressure Temperature Ratings For Alloy Steel F91 Flanges | ||||||
| Temperature °F | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 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 |
Alloy Steel F91 Flange HSN Code
| HSN Code | Product Description |
| 73079190 | HS or HSN Codes for Alloy Steel flange |
Alloy Steel F91 Flange Price List India
Check out the Alloy Steel F91 Flange Price List.
| Alloy Steel F91 Flange in India | Alloy Steel F91 Flange Price in INR |
| Alloy Steel Flanges A182 F91, 150, 300, 600 LBS, 900 LBS, 1500#, Class 2500 | Rs. 214 |
| Flanges A182 F91 B16.5 | Rs. 5,183 |
| F91 Alloy Steel Class 150 Flanges as per ASME B 16.5 | Rs. 3,114 |
| Pn16 Dn65 Dn80 CrMo F91 Flange | Rs. 175 |
| F91 Alloy Steel Plate Flange | Rs. 4,180 |
| Alloy Steel Flange F91 | Rs. 5,703 |
Alloy Steel F91 Flanges Standard
For more information on flange standards, or to learn more about custom flanges for particular specifications, contact us today.
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API Flanges
Chemical Composition of SA 182 F91 Alloy Steel Flanges
| Grade | C | Mn | P | S | Si | Ni | Ch | Mo | Cb | N |
| F91 | 0.08-0.12 | 0.30-0.60 | 0.020 | 0.010 | 0.20-0.50 | 0.40 | 8.0-9.5 | 0.85-1.05 | 0.06-0.10 | 0.03-0.07 |
F91 Alloy Steel Flanges Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
|---|---|---|---|---|---|
| F91 | 585 | 415 | 20 | – | 248 max |
Applications of Alloy Steel F91 Flanges
Oil & Gas Industry
Power Generation Industry
Petrochemical Industry
Chemical Industry
Cement Industry
We Export Alloy Steel F91 Flanges Across the Globe
Denmark, Germany, Taiwan, Gabon, Norway, Greece, Zimbabwe, Lithuania, Ukraine, Sweden, Kenya, United States, Russia, Malaysia, Colombia, Bolivia, Hong Kong, Canada, Saudi Arabia, Afghanistan, Lahore, Qatar, Bhutan, Iran, Peru, Brazil, Ecuador, Chile, New Zealand, Venezuela, Ireland, China, India, Bulgaria, Algeria, Iraq, Netherlands, Ghana, Nigeria, Austria, France, Poland, Libya, columbia, Gambia, Yemen, Estonia, Romania, Nepal, Azerbaijan, Lebanon, Mongolia, Hungary, Sri Lanka, Japan, South Korea, Vietnam, United Arab Emirates, Indonesia, Czech Republic, Bangladesh, Kazakhstan, Israel, South Africa, Bahrain, Switzerland, Costa Rica, Oman, Turkey, Philippines, Tunisia, Namibia, Italy, Angola, Kuwait, Tibet, Finland, Macau, Slovakia, Puerto Rico, Algiera, Serbia, Belarus, Trinidad & Tobago, Australia, Mexico, Belgium, Argentina, Portugal, United Kingdom, Singapore, Egypt, Morocco, Jordan, Spain, Pakistan, Thailand, Croatia.
Domestic Supply A182 Gr F91 Flanges
Gurgaon, Bhopal, Howrah, Thane, Thiruvananthapuram, Nashik, Indore, Ranchi, Jaipur, Faridabad, Surat, mumbai, Haryana, Kolkata, Ludhiana, Ahmedabad, Chandigarh, Pune, Visakhapatnam, Noida, Navi Mumbai, Nagpur, Kanpur, Jamshedpur, Bengaluru, Rajkot, Secunderabad, Pimpri-Chinchwad, Hyderabad, Chennai, New Delhi, Ernakulam.