Stainless Steel 321 / 321H Flanges Manufacturer

Global Steel India is one of the pioneer suppliers of quality SS 321/321H Flanges. 

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Stainless steel 321 flanges are made of austenitic stainless steel which is stabilized with the addition of titanium. Stainless steel 321 flanges have high strength, resistance to scaling, and phase stability, with resistance to aqueous corrosion. Stainless steel 321 flanges have higher heat strength than stainless steel 304 flanges. There are many uses for stainless steel 321 flanges, especially in environments that require higher temperatures. They possess excellent corrosion resistance properties. After heating within the carbide precipitation range of 425-850°C, the stainless steel 321 flange is not susceptible to intergranular corrosion. For applications requiring a temperature range of up to 900°C, stainless steel 321 flange is a perfect choice. Stainless Steel 321 Flanges are widely used in several industries including petrochemical, oil and gas, power generation, bulk liquid transportation, chemicals, pharmaceuticals, pulp and paper manufacturing, textiles, etc. All our stainless steel 321 flange are produced in accordance with international standards. Stainless steel 321 flanges are safely packaged to ensure that there is no damage during transit.

Stainless steel 321H flange is a higher carbon version of stainless steel 321 flange. It is stabilized against carbide precipitation and can be used in temperatures between 427°C to 816°C (800°F to 1500°F). When annealed, stainless steel 321H is non-magnetic and can be hardened only by cold working. The added titanium in its composition allows stainless steel 321H flanges to suppress grain boundary chromium carbide precipitation and reduce the risk of intergranular corrosion. This austenitic Stainless Steel alloy offers great properties such as high tensile strength, high yield strength, and excellent creep-rupture properties. It has good forming and deep drawing qualities.

Specification of SS 321,321H Flanges

Standards ASTM A182 / ASME SA182
Dimensions ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc
Size 1/2″ (15 NB) to 48″ (1200NB)
Class / Pressure 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flange Face Type Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Stainless Steel 321 / 321H Flanges

Equivalent Grades

STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H X12CrNiTi18-9

Manufacturing Standards

ASME/ANSI B16.5 Blind Flange, High Hub Blind Flange, Slip on Flange, Welding Neck Flange, Socket Weld Flange, Ring Type Joint Flange, Lap Joint Flange, Threaded Flange
PRESSURE CLASS 150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B16.47 Blind Flange [Series A & B],Welding Neck Flange
PRESSURE CLASS 75, 150, 300, 400, 600, 900
ASME/ANSI B16.36 Orifice Flange
PRESSURE CLASS 300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1 Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange, Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange,
PRESSURE CLASS PN 2.5 TO PN 40
BS 4504[PART 1] Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded,
PRESSURE CLASS PN 2.5 TO PN 400
BS 1560 BOSS Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded,
PRESSURE CLASS 150, 300, 400, 600, 900, 1500, 2500
BS10 Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange
TABLE D, E, F, H
DIN FLANGES DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
PRESSURE CLASS PN 6 TO PN 100

Different Types

Slip On Flanges

SS 321,321H Slip On Flanges

Blind Flanges

SS 321,321H Blind Flanges

Socket Weld Flanges

SS 321,321H Socket Weld Flanges

Weld Neck Flange

SS 321,321H Weld Neck Flanges

Reducing Flanges

SS 321,321H Reducing Flanges

Orifice Flanges

SS 321,321H Orifice Flanges

Contact us to get a quick quote for your requirement.

We offer These Stainless Steel 321,321H Flanges as per DIN, ASTM, ASME, BS, EN, JIS or ANSI Standard.

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Available Stock

  • SS 321H RTJ Flanges
  • SS 321H Groove Flanges
  • Grade 321 Stainless Steel Flanges
  • Type 321H SS Industrial Forged Flanges
  • ANSI B16.5 Stainless Steel 321 Expander Flanges
  • 321 Stainless Steel Nipoflange
  • SS 321 Spectacle Blind Flanges
  • Stainless Steel 321H Plate Flange
  • ASTM A182 F321 Stainless Steel Flanges
  • UNS S32109 Stainless Steel Lap Joint Flanges
  • 321H SS Flanges
  • UNS S32109 Male & Female Flanges
  • Stainless Steel 321 Tongue Flanges
  • 321 SS Pipe Flange
  • Stainless Steel 321 PN 10 Flange
  • INOX 321 Flanges
  • SS 321H British Standard Table D Pipe Flanges
  • Stainless Steel 321 Long Welding Neck Flange
  • Stainless Steel 321H BS Standard Table E
  • 321H SS Weldo Flanges
  • Stainless Steel 321H Nipo Flanges
  • SS 1.4541 1500 LBS Flanges
  • SS 321H Lapped Joint Flanges
  • SS 321H DIN Flanges
  • SS 321 Flat Face Flanges
  • Stainless Steel 321H Screwed Flanges
  • Austenitic Stainless Steel 321H Flanges
  • Stainless Steel 321H Flanges
  • 321H SS 150 LBS Threaded Flanges
  • Stainless Steel 321 Spades Ring Spacers Flanges
  • ASME B16.47 SS 321H Spades Ring Spacers Flanges

Weight Chart

15mm (1/2″) Stainless Steel 321 Flanges Weight Chart

Pipe Normal Diam.
O.D. Flange 
Thk. Of Flange Min 
Diam.
of
Hub 
Diameter of Raised Face 
Length Hub.Y
Thread Length
Diam. 
of Bolt
Circle
Diam. 
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
KG
LB
inch
dn
O
C
X
G
Y
T
BC
BH
BN
BD
 
 
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

Dimensions

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)
  • ASME B1.20.1, Pipe Threads, General Purpose
  • ASME B16.1, Cast Iron Flanges and Flanged Fittings Classes 25, 125 and 250
  • ASME B16.5, Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24
  • ASME B16.11, Forged Fittings, Socket Welding and Threaded
  • ASME B16.25, Buttwelding Ends
  • ASME B16.36, Orifice Flanges
  • ASME B16.47, Large Diameter Steel Flanges NPS 26 Through NPS 60
  • ASME B31.1, Power Piping
  • ASME B31.3, Process Piping
  • ASME B46.1, Surface Texture (Surface Roughness, Waviness, and Lay)

Pressure Rating

ANSI/ASME B16.34 PRESSURE RATING CHART
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

Chemical Structure

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 0.10 max 9.00 – 12.00 5(C+N) – 0.70 max
SS 321H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 0.10 max 9.00 – 12.00 4(C+N) – 0.70 max

Mechanical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

We Serve Application Industry

Application Industry

ANSI / ASME 16.5, 16.48, 16.47 Flanges applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.

Oil & Gas Industry

Petrochemical Industry

Power Generation Industry

Chemical Industry

We Export Stainless Steel 321,321H Flanges Across the Globe

Japan, Oman, Costa Rica, Algiera, Canada, Taiwan, Ecuador, Azerbaijan, United Kingdom, columbia, Serbia, Tunisia, Venezuela, Malaysia, France, Portugal, Kuwait, Hong Kong, United Arab Emirates, Romania, Egypt, Sweden, Lithuania, Netherlands, New Zealand, Estonia, Ukraine, Trinidad & Tobago, Bangladesh, Gabon, Italy, Vietnam, Mexico, United States, Israel, Gambia, Zimbabwe, Thailand, Morocco, Algeria, Yemen, Argentina, China, Croatia, Philippines, Turkey, Norway, Spain, Jordan, Singapore, Mongolia, Libya, Afghanistan, Denmark, Macau, Qatar, Ghana, Greece, Nigeria, Hungary, Angola, Slovakia, Bulgaria, South Africa, Lahore, Kenya, Australia, Puerto Rico, South Korea, Indonesia, India, Namibia, Bolivia, Finland, Belgium, Bhutan, Sri Lanka, Czech Republic, Chile, Pakistan, Saudi Arabia, Belarus, Poland, Iran, Germany, Brazil, Ireland, Colombia, Lebanon, Tibet, Iraq, Austria, Nepal, Russia, Peru, Kazakhstan, Switzerland, Bahrain.

Domestic Supply Stainless Steel 321,321H Flanges

New Delhi, Hyderabad, Pune, Bengaluru, Noida, Chandigarh, Jamshedpur, Visakhapatnam, Nashik, Chennai, Gurgaon, Ludhiana, Navi Mumbai, Secunderabad, Thiruvananthapuram, Ahmedabad, Haryana, Kolkata, Faridabad, Nagpur, Ernakulam , Surat, Pimpri-Chinchwad, Howrah, Ranchi, Jaipur, Thane, Rajkot, Kanpur, Bhopal, Indore, mumbai.

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