Refer ASTM A182 F321 Blind / Socket Weld / Weld Neck / UNS S32100 Slip On Flange Equivalent Table And Chemical Composition
What is Stainless Steel 321 reducing flange?
Stainless steel 321 flanges are austenitic components designed with an 18/8 chemical composition having additions of niobium or titanium to stabilize them. A reducing flange in the 321 grade is employed in connecting a range of piping materials of dissimilar sizes. These flanges have boring holes of different diameters allowing them to fit pipes of different models. Reducing flanges in this range come in the form of blind, weld neck, threaded and slip-on flanges. The flanges are available in different pressure sizes and are frequently utilized in fittings where there is limited space. The short-length flange shouldn’t be used in sudden transitions between lines where there are chances of turbulence.
What is AISI 321 Table E flange?
Flanges are piping components that are utilized in joining different piping components across the system. AISI 321 Table E flange is a versatile module having specifications where different diameters like holes, module, number of bolts, sizes of these bolts are precisely designed. The AISI 321 Table E flange is a chromium-nickel grade combined with niobium and titanium to stabilize them. The Table E flanges in this range have a diameter of 95mm with a bolt circle diameter of 67mm. The module can fit 4 bolts each, having a size of 13mm with a diameter of 14mm. The modules are highly resistant to carbide precipitation and can withstand in temperatures up to 900 degrees C.
ASTM A182 F321 Plate vs Forged flange
Plate and forged flanges are unique components of flanges that can be distinguished based on certain features.
- ASTM A182 F321 plate is generally placed in casts and later machined to get it in precise shapes. Forged flanges are manufactured by passing a heated billet through an extruded metal component.
- Forged flanges are more strong and robust due to their unique grain structure compared to a plate flange.
- Plate flanges can be machined more easily and shaped in precise sizes in comparison to standard forged flanges.

Stainless Steel 321 Flanges

ASTM A182 F321H Blind Flange

UNS S32100 Slip On Flanges

ASTM A182 Gr F321 Chemical Composition
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
SS 321 | 0.08 maximum | 2 maximum | 1.0 maximum | 0.045 maximum | 0.030 maximum | 17.00 - 19.00 | 0.10 maximum | 9.00 - 12.00 | 5(C+N) – 0.70 maximum |
SS 321H | 0.04 – 0.10 | 2 maximum | 0.75 maximum | 0.045 maximum | 0.030 maximum | 17.00 - 19.00 | 0.10 maximum | 9.00 – 12.00 | 4(C+N) – 0.70 maximum |
SA182 F321 Mechanical Properties
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8.0 g/cm3 | 1457 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
ASTM A182 F321 Flanges Specification
Specification: | ASTM A182 Stainless Steel 321 Flanges |
---|---|
UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
Standards | ASME/ANSI B16.5, API 590, ASME B16.47A/B, ASME B16.36, API7S-15, ISO 70051, EN 1092-1, DIN, B16.48, GOST, API7S-43, API 605, API 6A, BS 10, MSS SP44, BS1560-3.1, BS 4504, BS, EN-1092, EN, DIN, JIS B2220, B16.47 Series A & B, BS 1042 |
Most common types of Flanges | Forged / Threaded / Screwed / Plate |
Pressure Rating ANSI | 2500 LBS, Class 150 LBS, 900 LBS, 1500 LBS, 300 LBS, 600 LBS |
Production technique |
|
JIS | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
Size Chart | 1/2" to 48" |
Connect Type/ Flanges Face Type | Flat Face (FF) Flanges, Large Male-Female (LMF) Flanges, Raised Face (RF) Flanges, Large Tongue & Groove, Groove, Lap-Joint Face (LJF) Flanges, Small Male-Female (SMF) Flanges, Small Tongue Flanges, Ring Type Joint (RTJ) Flanges |
EN | 10Bar 16Bar 6Bar 25Bar 40Bar |
Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Cold and Hot Dip Galvanized, Yellow Transparent, |
Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
Types Of Stainless Steel 321 Flanges

10 Inch, Class 150 LB, SCH 40, ASTM A182 F321 WN Flange

30 Inch, Class 600 LB, RF, ASTM A182 F321 Weld Neck Flange

12 Inch, SCH 40, RF, 150 LB, ASTM A182 F321 Weld Neck Flange

PN16, DN80, EN1092-1 Type 11, ASTM A182 F321 WN Flange

150 LB, 1/2 Inch, RF, ASTM A182 F321 Stainless Steel Threaded Flange

4 Inch. SCH 80, ASME B16.5, F321 NPT Flanges

2 Inch, 300 LB, RF, BS4504, A182 F321 Thread Flange

2 Inch x NPTF 1-1/2 Inch, RF, A182 F321 Screw Flange
ASME B16.5 SS 321 Threaded / Long Weld Neck / Werkstoff No 1.4541 Plate Flange Manufacturer In Mumbai, India.
UNS S32100 Slip On Flange Temperature
ANSI/ASME B16.34 | ANSI PRESSURE RATING | ||||||
Temperature °F | 150LB | 300LB | 400LB | 600LB | 900LB | 1500LB | 2500LB |
-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 |
ASTM A182 F321 Equivalent
STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
Stainless Steel 321 Flanges | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
ASTM A182 F321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
Stainless Steel 321 Flanges Weight Chart
Standard | Class | Diameter | Bolt Circle Diameter | Number of Bolts | Bolt Size | Diameter of Bolt Hole |
---|---|---|---|---|---|---|
AS4087 | PN14 | 95 | 67 | 4 | M12 | 14 |
AS 2129 Flange | 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) Flange | 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 |
Check Class 150 ASTM A182 Gr F321 Stainless Steel Pipe Flanges Mechanical Properties, Price List, Weight Chart, Dimensions.
ASTM A182 F321H Blind Flanges Dimensions
Standard Of SS 321 Flanges | |||||||
---|---|---|---|---|---|---|---|
CLASS | NPS | ASTM A182 F321 SORF Flanges | ASTM A182 F321 NPT Flanges | ASTM A182 F321 SW Flanges | ASTM A182 F321 Loose Flanges | ASTM A182 F321 BLRF Flanges | ASTM A182 F321 WN Flanges |
150# | 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 | |
CLASS | NPS | SORF | NPT Flanges | SW | Loose | BLRF | WN |
300# | 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 | |
CLASS | NPS | SORF | NPT Flanges | SW | Loose | BLRF | WN |
400# | 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 | |
CLASS | NPS | SORF | NPT Flanges | SW | Loose | BLRF | WN |
600# | 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 | 15 | 15 | 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 | |
CLASS | NPS | SORF | NPT Flanges | SW | Loose | BLRF | WN |
900# | 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 | |
CLASS | NPS | SORF | NPT Flanges | SW | Loose | BLRF | WN |
1500# | 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 | |
CLASS | NPS | SORF | NPT Flanges | SW | Loose | BLRF | WN |
2500# | 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 |