Duplex Steel Flanges Manufacturer

Global Steel is a renowned supplier and manufacturer of Duplex steel flanges. Being one of India’s most reputable stockholders of Duplex steel  flanges, we are able to supply our products at competitive rates due to our extensive expertise and experience in the industry.  

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Duplex steel flanges are made from work hardenable alloys that are exceptionally corrosion-resistant. A blend of austenite and ferrite phases makes up their composition. As a result, qualities of both austenitic and ferritic stainless steel can be found in duplex steel flanges. While duplex stainless steel is resistant to stress corrosion cracking, it is not as robust as ferritic stainless steel to this type of assault. The corrosion resistance of the least resistant duplex stainless steel, on the other hand, is higher than that of the most generally used stainless steel grades, 304 and 316. Duplex stainless steel is extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulfide environments, Duplex steel flanges exhibit very high resistance to stress corrosion cracking.

Duplex steel flanges are more resistant to saltwater than grade 316. It’s nitrogen-enhanced stainless steel that was created to solve the 300 series stainless steel’s corrosion resistance difficulties.

Duplex steel flanges are frequently utilized in a variety of applications, including storage tanks, water heaters, and bridges. They’re mostly used in situations when the austenitic grades might fail prematurely. Other applications include chemical processing, transport and storage, Oil and gas exploration and offshore rigs, Oil and gas refining, Pollution control equipment, Pulp & paper manufacturing, and Chemical process plant.

Specification List of DSS 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)
Duplex Steel Flanges

Manufacturing Standards of ASTM A182 Duplex Steel Flanges

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 of Duplex Steel Flanges

Slip On Flanges

Duplex Steel Slip On Flanges

  • DSS Slip On Flanges
  • Duplex Steel Raised Face Slip on Flanges
  • Duplex Steel ASTM A182 Duplex Steel Slip On Flange
  • Duplex Steel Flat Face Slip on Flanges
  • Duplex Steel SOFF Flange
  • DSS SORTJ Flange
  • Duplex Stainless Steel Slip On Flange
  • DSS Slip-on Raised Face Flange
  • ASME SA182 DSS Slip-on Flange
  • Duplex Steel Slip On Plate Flanges
  • Duplex Slip On Flange
Blind Flanges

Duplex Steel Blind Flanges

  • DSS Blind Raised Face Flange
  • ASME SA182 DSS Blind Flange
  • Duplex Steel Blind Plate Flanges
  • Duplex Steel BLFF Flange
  • ASTM A182 Duplex Steel Blind Flange
  • Duplex Blind Flange
  • Duplex Steel Flat Face Blind Flanges
  • Duplex Steel Raised Face Blind Flanges
  • Duplex Steel RFBL Flange
  • DSS BLRTJ Flange
  • Duplex Stainless Steel Blind Flange
  • DSS Blind Flanges
Socket Weld Flanges

Duplex Steel Socket Weld Flanges

  • DSS Socketweld Flange
  • Duplex Socket Weld Flanges
  • DSS SWRTJ Flange
  • Duplex Steel Socketweld Plate Flanges
  • Duplex Steel Raised Face Socketweld Flanges
  • Duplex Stainless Steel Socketweld Flange
  • Duplex Steel RFSW Flange
  • ASTM A182 Duplex Steel Socketweld Flange
  • ASME SA182 DSS Socketweld Flange
  • Duplex Socketweld Flanges
  • Duplex Steel Flat Face Socketweld Flanges
  • Duplex Steel SWFF Flange
  • DSS Socket Weld Raised Face Flange
Weld Neck Flange

Duplex Steel Weld Neck Flanges

  • Duplex Steel Welding Neck Plate Flanges
  • Duplex Weld Neck Raised Face Flange
  • Duplex Stainless Steel Weld Neck Flange
  • Duplex Steel Weld Neck Pipe Flanges
  • DSS Welding Neck Flange
  • Duplex Steel RFWN Flange
  • ASTM A182 Duplex Steel Weld Neck Flange
  • DSS Weld Neck Flange
  • Duplex Steel Welding Neck Flange
  • ASME SA182 DSS Weld Neck Flange
  • Duplex Steel Raised Face Weld Neck Flanges
Reducing Flanges

Duplex Steel Reducing Flanges

  • Duplex Steel Reducing Flanges
  • Duplex Steel Reducing Plate Flanges
  • Duplex Stainless Steel Reducing Flange
  • DSS Reducing Flanges
  • ASTM A182 Duplex Steel Reducing Flange
  • ASME SA182 DSS Reducing Flange
  • Duplex Reducing Flanges
Orifice Flanges

Duplex Steel Orifice Flanges

  • ASTM A182 Duplex Steel Orifice Flange
  • Duplex Steel Orifice Plate Flanges
  • Duplex Orifice Flange
  • ASME SA182 DSS Orifice Flange
  • Duplex Stainless Steel Orifice Flange
  • DSS Orifice Flange

Contact us to get a quick quote for your requirement.

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

Available Stock of DSS Flanges

  • Duplex Steel Tongue Flanges
  • Duplex NPT / BSP Thread Flanges
  • DSS Groove Flanges
  • Duplex Stainless Steel Pipe Flange
  • Duplex Stainless Steel Flanges
  • Duplex Steel RTJ Flanges
  • ANSI B16.5 Duplex Steel Expander Flanges
  • Duplex Steel Lap Joint Flanges
  • Duplex Steel Male & Female Flanges
  • Duplex Steel PN 10 Flange
  • Type DSS Industrial Forged Flanges
  • ASME B16.47 Duplex Spades Ring Spacers Flanges
  • Duplex Stainless Steel RTJ Flanges
  • DSS Gr Flanges
  • Duplex Steel BS Standard Table E
  • Duplex Steel British Standard Table D Pipe Flanges
  • Duplex Steel Long Welding Neck Flange
  • Duplex Steel DIN Flanges
  • DSS Grade ANSI Flanges
  • Duplex Steel 300 LBS Flanges
  • Duplex Steel 150 LBS Threaded Flanges
  • Duplex Steel Spades Ring Spacers Flanges
  • Duplex High Hub Blind Flanges
  • DSS Lapped Joint Flanges
  • DSS Flat Face Flanges
  • DSS 1500 LBS Flanges
  • Duplex Stainless Steel Weldo Flanges
  • Duplex Stainless Steel Flanges
  • Duplex Spectacle Blind Flanges
  • ANSI / ASME B16.5 DSS Forged Flanges

DSS Flanges Weight Chart

15mm (1/2″) Duplex Steel 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

Duplex Steel Pipe Flange 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)

Duplex Steel Flanges 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

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

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We Export Duplex Steel Flanges Across the Globe

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

Domestic Supply Duplex Steel Flanges

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

Global Steel is a significant manufacturer and exporter of all ferrous and non-ferrous metals. As a pioneer and leader in the industry, Global Steel is at the forefront of technology and research.

Quick Contact

Shop No.6, Sonarika Bldg, 25/C, Chandawadi, Cawasji Patel Tank, Mumbai, Maharashtra 400004