ASTM A182 Alloy Steel F91 Flanges

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Alloy Steel A182 F91 Flanges

ASTM A182 Alloy Steel F91 Flanges Manufacturer, UNS K90901 Weld Neck Flange, ASTM A182 F91 Slip-on Flange, WNR 1.4903 Lap Joint Flange, Cr-Mo F91 Blind Flange

F91 flanges are a type of flange made from ASTM A182 Grade F91 material, which is a low alloy steel containing chromium and molybdenum. F91 flanges are commonly used in high-pressure and high-temperature applications, such as in oil and gas, chemical, and power generation industries.

F91 flanges are typically available in various sizes and pressure ratings, and they can be manufactured in various types such as weld neck, slip-on, socket weld, and threaded. They are designed to connect pipes or equipment, allowing for easy assembly and disassembly.

One of the key advantages of using F91 flanges is their high resistance to corrosion and erosion, making them ideal for use in harsh environments. They also offer high strength and durability, which ensures their long-term reliability in demanding applications.

When selecting F91 flanges, it is important to consider factors such as temperature, pressure, and media compatibility to ensure that the chosen flange is suitable for the intended application. Additionally, proper installation and maintenance are crucial for ensuring the optimal performance of F91 flanges.

Alloy Steel F91 Flanges

SpecificationsMaterial GradesDimensionsWeight ChartPressure Chart Schedule ChartApplications

ASME / ANSI B16.5 Alloy Steel F91 RTJ Flange, PN10 PN16 Chromium Molybdenum Gr. F91 Threaded Flange, Table D & Table E Chrome Moly F91 Spectacle Blind Flange, ANSI 150 Alloy Grade F91 Socket Weld Flange at the Lowest Prices

Alloy Steel F91 Flange Specifications

Size Range

1/2″ (15 NB) to 48″ (1200NB)

Class / Pressure Rating

150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Standards / Dimensions

ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, BS, GOST, MSS SP-44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605

Connection Type

Ring Joint Flange (RTJ), Flat Face Flange (FF), Raised Face Flange (RF), Male and Female Flange (M & F), Lap Joint Flange, Large and Small Tongue-and-Groove Flange (T & G)

Material Standards

ASTM A182 / ASME SA182

Alloy Steel F91 Flanges Equivalent Grade

STANDARD UNS WERKSTOFF NR. Trade Name
Alloy Steel F91 K90901 1.4903 9Cr-1Mo-V

ASTM A182 Alloy Steel Grade F91 Flanges Chemical Composition

Grade C Mn Si P S Cr Mo
Alloy Steel F91 0.08 – 0.12 0.3 – 0.6 0.5 0.01 0.02 8.5 – 9.5 0.85 – 1.05

Alloy Steel A182 F91 Flanges Mechanical Properties

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min
Alloy Steel F91 415 585 20

Find the largest ready stock of  Class 300#, 600#, 900#, 1500#, 2500# Alloy Steel F91 Flanges, Cr-Mo F91 Weld Neck Flanges, Alloy Grade F91 Long Welding Neck Flange, F91 Alloy Steel Blind Flange, Alloy Steel F91 Weld Neck Flanges A / B, Chromium Molybdenum F91 Socket weld Flanges, F91 Alloy Steel Nipo Flanges, EN 1.4903 Flanges, Alloy Gr. F91 Expander Flanges at Best Price, F91 Chrome Moly Steel Forging Facing Flanges, Alloy Steel F91 Flanges Dimensions, Alloy F91 BS Standard Table E Flange, Chrome Moly UNS K90901 Lap Joint Flanges, ANSI B16.5 Alloy Steel F91 Pipe Flange in Mumbai, India.

A182 Alloy Steel F91 Flanges Dimensions & Size

Nominal Pipes Sizes OD (Outside Dia) of Flange Thickness Dia of Raised Face Dia of Hub at Base Length Thru Hub Dia or Bore Dia of Hub at Bevel Radius of Fillet Depth of Socket
Welding Neck Slip-On Threaded Socket Lap Joint Slip-on Socket Lap Joint
O Q R X Y Y Y W B H r Z
1/2 3-1/2 7/16 1-3/8 1-3/16 1-7/8 5/8 5/8 .88 .90 .84 1/8 3/8
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 1/8 7/16
1 4-1/4 9/16 2 1-15/16 2-3/16 11/16 11/16 1.36 1.38 1.32 1/8 1/2
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 3/16 9/16
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 1/4 5/8
2 6 3/4 3-5/8 3-1/16 2-1/2 1 1 2.44 2.46 2.38 5/16 11/16
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 5/16 3/4
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 3/8 13/16
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 3/8 7/8
4 9 15/16 6-3/16 5-5/16 3 1-5/16 1-5/16 4.57 4.60 4.50 7/16 15/16
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 7/16 15/16
6 11 1 8-1/2 7-9/16 3-1/2 1-9/16 1-9/16 6.72 6.75 6.63 1/2 1-1/16
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 1/2 1-1/4
10 16 1-3/16 12-3/4 12 4 1-15/16 1-15/16 10.88 10.92 10.75 1/2 1-5/16
12 19 1-1/4 15 14-3/8 4-1/2 2-3/16 2-3/16 12.88 12.92 12.75 1/2 1-9/16
14 21 1-3/8 16-1/4 15-3/4 5 2-1/4 3-1/8 14.14 14.18 14.00 1/2 1-5/8
16 23-1/2 1-7/16 18-1/2 18 5 2-1/2 3-7/16 16.16 16.19 16.00 1/2 1-3/4
18 25 1-9/16 21 19-7/8 5-1/2 2-11/16 3-13/16 18.18 18.20 18.00 1/2 1-15/16
20 27-1/2 1-11/16 23 22 5-11/16 2-7/8 4-1/16 20.20 20.25 20.00 1/2 2-1/8
24 32 1-7/8 27-1/4 26-1/8 6 3-1/4 4-3/8 24.25 24.25 24.00 1/2 2-1/2

A182 Alloy Steel F91 Flanges Weight Chart

CLASS Nominal Pipe Size Slip On Threaded Socket Weld Lap Joint Blind Weld Neck
150 lb ½ 1 1 2 1 2 2
¾ 2 2 2 2 2 2
1 2 2 2 2 2 3
1¼ 3 3 3 3 3 3
1½ 3 3 3 3 4 4
2 5 5 5 5 5 6
2½ 8 8 8 8 7 10
3 9 9 9 9 9 11.5
3½ 11 12 11 11 13 12
4 13 13 13 13 17 16.5
5 15 15 15 15 20 21
6 19 19 19 19 27 26
8 30 30 30 30 47 42
10 43 43 43 43 70 54
12 64 64 64 64 123 88
14 90 90 90 105 140 114
16 106 98 98 140 180 140
18 130 130 130 160 220 165
20 165 165 165 195 285 197
22 185 185 185 245 355 225
24 220 220 220 275 430 268
 
300 lb ½ 2 2 3 2 2 2
¾ 3 3 3 3 3 3
1 3 3 3 3 4 4
1¼ 4.5 4.5 4 4.5 6 5
1½ 6.5 6.5 6 6.5 7 7
2 7 7 7 7 8 9
2½ 10 10 10 10 12 12
3 13 14 13 14.5 16 18
3½ 17 17 17 17 21 20
4 23.5 24 22 24 28 26.5
5 29 31 28 28 37 36
6 39 39 39 39 50 45
8 58 58 58 58 81 69
10 81 81 81 91 124 100
12 115 115 115 140 185 142
14 165 165 165 190 250 206
16 210 220 190 234 315 250
18 253 280 250 305 414 320
20 315 325 315 375 515 400
22 370 370 370 435 640 465
24 490 490 475 550 800 580
 
400 lb ½ 2 2 2 2 2 3
¾ 3 3 3 3 3 3.5
1 3.5 3.5 3.5 3.5 4 4
1¼ 4.5 4.5 4.5 4.5 6 4.5
1½ 6.5 6.5 6.5 6.5 8 8
2 8 8 8 8 10 10
2½ 12 12 12 11 15 14
3 15 15 15 14 20 18
3½ 21 21 21 20 29 26
4 26 26 26 25 33 35
5 31 31 31 29 44 43
6 44 44 44 42 61 57
8 67 67 67 64 100 89
10 91 91 91 110 155 125
12 130 130 130 152 226 175
14 191 191 191 210 310 233
16 253 253 253 280 398 295
18 310 310 310 345 502 360
20 378 378 378 420 621 445
22 405 405 405 455 720 505
24 539 539 539 615 936 640
 
600 lb ½ 2 2 2 2 3 3
¾ 3 3 3 3 4 4
1 4 4 4 4 4 4
1¼ 5 5 5 5 6 6
1½ 7 7 7 7 8 8
2 9 9 9 9 10 12
2½ 13 13 13 12 15 18
3 16 16 16 15 20 23
3½ 21 21 21 20 29 26
4 37 37 37 36 41 42
5 63 63 63 63 68 68
6 80 80 80 78 86 81
8 115 115 115 112 140 120
10 177 177 177 195 231 190
12 215 215 215 240 295 226
14 259 259 259 290 378 347
16 366 366 366 400 527 481
18 476 476 476 469 665 555
20 612 612 612 604 855 690
22 590 590 590 670 1000 720
24 876 876 876 866 1250 977
 
900 lb ½ 6 6 6 6 4 7
¾ 6 6 6 6 6 7
1 7.5 7.5 7.5 7.5 9 8.5
1¼ 10 10 10 10 10 10
1½ 14 14 14 14 14 14
2 22 22 22 21 25 24
2½ 31 31 31 25 32 31
3 36 36 36 29 35 36
4 53 53 53 51 54 53
5 83 83 83 81 87 86
6 110 110 110 105 115 110
8 172 172 172 190 200 187
10 245 245 245 277 290 268
12 326 326 326 371 415 372
14 400 400 400 415 520 562
16 459 459 459 488 619 685
18 647 647 647 670 880 924
20 792 792 792 868 1107 1164
24 1480 1480 1480 1659 2099 2107
 
1500 lb ½ 6 6 6 6 4 7
¾ 6 6 6 6 6 7
1 8 8 8 8 9 9
1¼ 10 10 10 10 10 10
1½ 14 14 14 14 14 14
2 25 25 25 25 25 25
2½ 36 36 36 35 35 36
3 48 48 48 47 48 48
4 73 73 73 75 73 73
5 132 132 132 140 140 132
6 165 165 165 170 160 165
8 260 260 260 286 302 275
10 436 436 436 485 510 455
12 667 667 667 749 775 690
14 940 940 940 890 975 940
16 1250 1250 1250 1250 1300 1250
18 1625 1625 1625 1475 1750 1625
20 2050 2050 2050 1775 2225 2050
24 2825 2825 2825 2825 3625 3325
 
2500 lb ½ …. 7 …. 7 7 8
¾ …. 9 …. 8 10 9
1 …. 12 …. 12 12 13
1¼ …. 18 …. 17 18 20
1½ …. 25 …. 24 25 28
2 …. 38 …. 37 39 42
2½ …. 55 …. 53 56 52
3 …. 83 …. 80 86 94
4 …. 127 …. 122 133 146
5 …. 210 …. 204 223 244
6 …. 323 …. 314 345 378
8 …. 485 …. 471 533 576
10 …. 925 …. 897 1025 1068
12 …. 1300 …. 1262 1464 1608

Alloy Steel Grade F91 Flange Pressure Ratings

Temp. °F Class 75 psi Class 150 psi Class 300 psi Class 400 psi Class 600 psi Class 900 psi Class 1500 psi Class 2500 psi
-20~100 145 290 750 1000 1500 2250 3750 6250
200 135 260 735 980 1470 2210 3680 6135
300 115 230 700 935 1400 2100 3495 5830
400 100 200 670 890 1335 2005 3345 5570
500 85 170 645 860 1290 1940 3230 5385
600 70 140 605 805 1210 1815 3025 5040
650 60 125 590 785 1175 1765 2940 4905
700 – 110 570 755 1135 1705 2840 4730
750 – 95 530 710 1065 1595 2660 4430
800 – 80 510 675 1015 1525 2540 4230
850 – 65 485 650 975 1460 2435 4060
900 – 50 375 500 745 1120 1870 3115
950 – 35 275 365 550 825 1370 2285
1000 – 20 200 265 400 595 995 1655
1050 – – 145 190 290 430 720 1200
1100 – – 95 130 190 290 480 800
1150 – – 60 80 125 185 310 515
1200 – – 35 45 70 105 170 285

A182 B16.5 Alloy Steel F91 Flanges Schedule / Class

Flange Schedule/Class Pipe Size – Pipe Flanges Flange Connection Type Flange Material Max. Pressure
ASME B16.5 Class 150 1/2″ FNPT Alloy Steel F91 / Cr-Mo F91 / A182 F91 Flange 150 psi
ASME B16.5 Class 150 1/2″ Socket Weld 275 psi
ASME B16.5 Class 150 1/2″ Welded 150 psi
ASME B16.5 Class 150 3/4″ FNPT 150 psi
ASME B16.5 Class 150 3/4″ Socket Weld 275 psi
ASME B16.5 Class 150 1-1/4″ Socket Weld 275 psi
ASME B16.5 Class 150 1-1/2″ Socket Weld 275 psi
ASME B16.5 Class 150 2″ FNPT 150 psi
ASME B16.5 Class 150 2″ Socket Weld 275 psi
ASME B16.5 Class 150 2-1/2″ Socket Weld 275 psi
ASME B16.5 Class 150 3″ Socket Weld 275 psi
ASME B16.5 Class 150 4″ FNPT 150 psi
ASME B16.5 Class 150 4″ Socket Weld 275 psi
ASME B16.5 Class 300 1/2″ Slip On 720 psi
ASME B16.5 Class 300 1/2″ Slip On 720 psi
ASME B16.5 Class 300 1″ Slip On 720 psi
ASME B16.5 Class 300 1″ Slip On 720 psi
ASME B16.5 Class 300 1-1/4″ FNPT 720 psi
ASME B16.5 Class 300 1-1/4″ Slip On 720 psi
ASME B16.5 Class 300 1-1/2″ Slip On 720 psi
ASME B16.5 Class 300 1-1/2″ Slip On 720 psi
ASME B16.5 Class 300 2″ Slip On 720 psi
ASME B16.5 Class 300 2″ Slip On 720 psi
ASME B16.5 Class 300 2-1/2″ Slip On 720 psi
ASME B16.5 Class 300 2-1/2″ Slip On 720 psi
ASME B16.5 Class 300 3″ Slip On 720 psi
ASME B16.5 Class 300 3″ Slip On 720 psi
ASME B16.5 Class 300 4″ Slip On 720 psi
ASME B16.5 Class 300 4″ Slip On 720 psi

Alloy Steel Grade F91 Flanges Standard

American Steel Flanges Standard
Standard CodeStandard Name
ANSI ASME SA-182Forged Flanges
ANSI ASME B16.5Slip on flange, Welding neck flange, Blind
flange, Threaded flange, Lap joint flange, RTJ flange
ASME – B 16.47Welding neck flange, Blind flange
ASME – B 16.36Welding neck flange Slip on flange
German Steel Flanges Standard
DIN 2527Steel Blind Flanges, BLRF
DIN 2573 / 2576Flat Flange for Welding (Slip On)
DIN 2673Loose Flanges and Rings for Welding (Slip On Flanges and Plain Collars)
DIN 2641 / 2642Lapped / Loose (Lap Joint) Flanges Plain Collars
DIN 28115Long Neck Welding Flanges
DIN PN10, PN16Alloy Steel F91 PN10 Flanges, F91 Alloy Steel DIN PN 10 Flanges, A182 F91 Alloy Steel PN16 Flange
DIN PN20, PN25Alloy Steel F91 PN20 Flanges, F91 Chrome Moly DIN PN 25 Flanges
DIN PN40, PN50Chrome Moly Steel F91 PN40 Flanges, F91 Alloy Steel DIN PN 50 Flanges
Japanese Steel Flanges Standard
JIS B2220Slipon plate flange (SOP), Slipon Hub (SOH),
Socket Welding flange (SW), Welding neck
flange (WN), Lapjoint (LJ), Threaded flange
(TR)/ Itegral flange (IT) Blank flange (BL)
JIS B2291Slipon plate flange (SOP), Slipon Hub (SOH),
Socket Welding flange (SW), Welding neck
flange (WN), Lapjoint (LJ), Threaded flange
(TR)/ Itegral flange (IT) Blank flange (BL)
JIS 5K, 10KAlloy Steel F91 5K SORF Flanges, F91 Alloy Steel 10K SOFF Flanges
JIS 16K, 20KAlloy Steel F91 16K Blind Flanges, A182 F91 Chromium Molybdenum Steel 20K BLRF Flanges
JIS 30K, 40KAlloy Steel F91 30K Slip on Flanges, F91 Alloy Steel 40K Blind Flanges
Italian Flanges Standard
UNI FLANGESPlan flanges (2276, 2277, 2278, 6083, 6084)
Welding neck (2280, 2281, 2282, 2283,
2284, 2285, 2286) Lapped flanges (6088,
6089, 6090, 2999, 2300) Blind flanges
(6091, 6092, 6093, 6094, 6095, 6096, 6097)
threaded flanges (2253, 2254)
British Standard Pipe Flanges Standard
BS 10 Table DAlloy Steel F91 BS 10 Table D Flanges, F91 Table D Pipe Flange
BS 10 Table EAlloy Steel F91 BS 10 Table E Flanges, A182 F91 Table E Pipe Flange
BS 10 Table FChromium Molybdenum Steel F91 BS 10 Table E Flanges, F91 Cr-Mo Table E Flanges
BS 10 Table HAlloy Steel F91 BS 10 Table E Flanges, Cr-Mo F91 Table E Pipe Flanges

Best quality Alloy Steel Grade F91 Flanges, MSS SP-44 CrMo F91 Plate Flange, F91 Alloy Steel Forged Flanges Exporter, UNS K90901 Puddle Flanges Chromium Molybdenum Steel F91 Flange, Chrome Moly F91 Forged Flanges Flat Face, Alloy Steel F91 Flanges Dimension, Alloy A182 F91 Weld Neck Flanges, DIN 1.4903 Backup Flange, ASME SA182 AS F91 RTJ Flanges, F91 AS SORF Flange, Alloy Steel F91 Lap Joint Flanges, Werkstoff Nr. 1.4903 SORF Flanges, Chrome Moly F91 Flanges, Grade F91 Alloy Steel Flat Face Flanges, Cr-Mo F91 Spades Ring Spacers Flanges, Wrought Alloy Steel F91 Flanges, ASTM A182 F91 Expander Flanges at Best Price.

Alloy Steel A182 Grade F91 Flanges Applications

Australia, Afghanistan, Algeria, Angola, Argentina, Armenia, Azerbaijan, Bahrain, Bangladesh, Benin,
Bhutan, Botswana, Brazil, Brunei, Burkina Faso, Cambodia, Cameroon, Canada, Central Africa Republic,
Chad, Chile, Colombia, Cuba, Cyprus, DRC, Djibouti, Egypt, Equatorial Guinea, Eritrea, Eswatini,
Ethiopia, Fiji, Finland, France, Georgia, Germany, Ghana, Greece, Hungary, Iceland, Indonesia, Iran,
Iraq, Ireland, Israel, Italy, Japan, Jordan, Kazakhstan, Kenya, Kuwait, Kyrgyzstan, Laos, Lebanon,
Lesotho, Liberia, Libya, Lithuania, Madagascar, Malawi, Malaysia, Maldives, Mali, Mexico, Morocco,
Mozambique, Mauritania, Myanmar, Namibia, Nepal, Netherlands, New Zealand, Nigeria, Norway, Oman,
Panama, Peru, Philippines, Poland, Portugal, Palestine, Qatar, Russia, Rwanda, Romania, Saudi Arabia,
Senegal, Sierra Leone, Singapore, Slovakia, Somalia, South Africa, South Korea, South Sudan, Spain,
Sri Lanka, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Tanzania, Tasmania, Thailand, The Gambia,
Timor-Leste, Togo, Tunisia, Turkey, Turkiye, Turkmenistan, Uganda, Uzbekistan, United Arab Emirates (UAE),
United Kingdom (UK), United States (US), Venezuela, Vietnam, Yemen, Zambia, Zimbabwe

Abu Dhabi, Amsterdam, Abuja, Accra, Addis Ababa, Ahmedabad, Algiers, Amman, Ankara, Antananarivo,
Ashgabat, Asmara, Astana, Athens, Baghdad, Baku, Bamako, Bandar Seri Begawan, Bangkok, Bangui,
Banjul, Beirut, Bengaluru, Berlin, Bishkek, Bloemfontein, Bogotá, Bern, Brasília, Bratislava,
Bucharest, Budapest, Buenos Aires, Cairo, Canberra, Cape Town, Caracas, Chennai, Coimbatore, Dakar,
Damascus, Dhaka, Dili, Djibouti city, Dodoma, Doha, Dublin, Dushanbe, Freetown, Gaborone, Ghaziabad,
Guwahati, Hanoi, Harare, Havana, Helsinki, Hobart, Hyderabad, Indore, Jaipur, Jakarta, Jerusalem,
Juba, Jurong East, Kabul, Kampala, Kanpur, Kathmandu, Kigali, Kinshasa, Kochi, Kolkata, Kuala Lumpur,
Kuwait City, Lisbon, Lilongwe, Lima, Lobamba, Lomé, London, Luanda, Lucknow, Lusaka, Malabo, Madrid,
Malé, Mexico City, Manama, Moscow, Manila, Maputo, Maseru, Mbabane, Mogadishu, Monrovia, Mumabi,
Muscat, Nagpur, Nairobi, New Delhi, Niamey, Nicosia, Noida, Nouakchott, N’Djamena, Oslo, Ottawa,
Ouagadougou, Panama City, Paris, Patna, Phnom Penh, Porto-Novo, Pretoria, Pune, Rabat, Reykjavík,
Riyadh, Rome, Sana’a, Santiago, Sri Jayawardenepura Kotte, Stockholm, Seoul, Singapore, Surat,
Suva, Taipei City, Tashkent, Tokyo, Tbilisi, Tehran, Thimphu, Tripoli, Tunis, Vientiane, Vilnius,
Visakhapatnam, Warsaw, Washington D.C., Wellington, Windhoek, Yaoundé, Yerevan, Naypyidaw

Alloy Steel F91 Flanges Price

Omaa Metal Sources is ASME B16.5 ASTM A182 Alloy Steel F91 Flanges Exporters and Suppliers in the US, UK, South Africa, Saudi Arabia, Singapore, UAE, Oman, South Korea, Turkey, Bahrain, Malaysia, Philippines, Thailand, Norway, Indonesia, Iraq, Yemen, Bangladesh, Nigeria, Egypt, Peru, Ghana, Morocco, Etc.

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