Stainless Steel Flanges

Neeka Tubes is a prominent manufacturer of Stainless Steel Flanges, catering to industries worldwide. SS flanges connect pipes, valves, pumps and other allied equipment creating safe and leakage free joints. SS flanges are corrosion resistant, hard and strong with high strength and therefore utilized in different applications in industries.

We offer many types of stainless steel flanges such as Weld Neck, Slip-On, Socket Weld, Threaded, Blind, RTJ, Lap Joint, Back-Up, Reducing, and Orifice Flanges. Our flanges come in sizes ranging from ½” to over 36”. They can support different bores, from S/5s to XXH, and pressure ratings of 150, 300, and 600. Each SS flange is designed for optimal strength, reliability and performance.

Check Availability of Stainless Steel Flanges, High-Pressure Stainless Steel Flanges, Best Quality SS Flanges Manufacturer in India, We stock a range of SS Flanges​.

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Key Features of Stainless Steel Flanges

Key Features of Stainless Steel Flanges

  • Corrosion Resistance – Made from premium SS flanges, they resist rust and oxidation.
  • High Strength & Durability – Engineered to withstand high pressure and extreme conditions.
  • Leak-Proof Connections – Provides a tight, secure seal for industrial piping systems.
  • Easy Installation & Maintenance – Designed for simple fitting and long-term use.

Stainless steel flanges are commonly used in oil and gas, chemical processing, power plants, water treatment, food processing and pharmaceuticals. Their strong nature makes them important for piping systems, pressure vessels, and heat exchangers. These flanges help move fluids and gases effectively in industrial areas.

Most Common Types of Stainless Steel Flanges

Blind Flange

SS Blind Flange

Socket weld Flange

SS Socket weld Flange

Slip on Flange

SS Slip on Flange

Weld Neck Flange

SS Weld Neck Flange

Threaded Flange

SS Threaded Flange

Spectacle Blind Flange

SS Spectacle Blind Flange

Ring Type Joint Flange

SS Ring Type Joint Flange

Lap Joint Flanges

SS Lap Joint Flanges

Forged Flanges

SS Forged Flanges

Plate Flanges

SS Plate Flanges

Orifice Flanges

SS Orifice Flanges

Long Weld Neck Flange

SS Long Weld Neck Flange

Stainless Steel Flanges Specifications

Size Chart 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Standards API7S-15, API7S-43, API605, ANSI/ASME B16.5, B16.47 Series A & B, B16.48, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, EN1092
Pressure Rating ANSI 600 LBS, 900 LBS, 150 LBS, 2500 LBS, 300 LBS, 1500 LBS
Pressure Calculation in DIN 16Bar 6Bar 25Bar 40Bar 10Bar / PN10 PN16 PN6 PN25 PN64 PN40
JIS 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
UNI 6Bar 10Bar 16Bar 25Bar 40Bar
EN 6Bar 10Bar 16Bar 25Bar 40Bar
Coating Anti-rust Paint, Zinc Plated,Oil Black Paint, Cold and Hot Dip Galvanized, Yellow Transparent
Most common types Forged / Threaded / Screwed / Plate
Test Certificates EN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
Production technique
  • Forged, Heat treated and machined
Connect Type/ Flange Face Type Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Raised Face (RF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Special design

As per your drawing

AS, ANSI, BS, DIN and JIS
15 NB (1/2″) to 200 NB (8″)
Equal and Reducing Configurations
Testing performed by stainless steel flanges manufacturers in India Hydrostatic testing machine, X-ray detector, Direct-reading Spectrograph, UI trasonic flaw detector, Magnetic particle detector
Equipment Bending machine, Pushing Machine,Press machine, electric bevelling machine, Sand-blasting machine etc
Origin Indian / West Europe / Japan / USA / Korean
Common SS Flange standards

As a stainless steel flanges manufacturers in India we strictly follow the below standards

  • German (DIN)
  • B.S: BS4504 , BS3293, BS1560, BS10
  • AS 2129: Table D; Table E; Table H
  • ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
  • ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
  • American standard (ANSI)
  • British standard (BS)
  • ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
  • DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638
  • The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
SS Pipe Flanges applications
  • High demands in Petrochemical Plants
  • Nuclear power
  • Bitumen upgraders
  • Heavy oil refineries.
  • Oil and Gas sectors
Buy Online Flange SS 304​, Widest Size Range in SS Flange price​, Check SS Flange Manufacturer in Mumbai.
Grade C Mn Si P S Cr Mo Ni N Ti Fe
304 min. 18.0 8.0
max. 0.08 2.0 0.75 0.045 0.030 20.0 10.5 0.10
304L min. 18.0 8.0
max. 0.030 2.0 0.75 0.045 0.030 20.0 12.0 0.10
304H min. 0.04 18.0 8.0
max. 0.010 2.0 0.75 0.045 0.030 20.0 10.5
SS 310 0.015 max 2 max 0.015 max 0.020 max 0.015 max 24.00 26.00 0.10 max 19.00 21.00 54.7 min
SS 310S 0.08 max 2 max 1.00 max 0.045 max 0.030 max 24.00 26.00 0.75 max 19.00 21.00 53.095 min
SS 310H 0.04 0.10 2 max 1.00 max 0.045 max 0.030 max 24.00 26.00 19.00 21.00 53.885 min
316 min. 16.0 2.03.0 10.0  
max. 0.035 2.0 0.75 0.045 0.030 18.0 14.0  
316L min. 16.0 2.03.0 10.0    
max. 0.035 2.0 0.75 0.045 0.030 18.0 14.0  
316TI 0.08 max 10.00 14.00 2.0 max 0.045 max 0.030 max 16.00 18.00 0.75 max 2.00 3.00
317 0.08 max 2 max 1 max 0.045 max 0.030 max 18.00 20.00 3.00 4.00 57.845 min
SS 317L 0.035 max 2.0 max 1.0 max 0.045 max 0.030 max 18.00 20.00 3.00 4.00 11.00 15.00 57.89 min
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 19.00 9.00 12.00 0.10 max 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 9.00 12.00 0.10 max 4(C+N) 0.70 max
347/ 347H 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 20.00 9.0013.00
410 min. 11.5
max. 0.15 1.0 1.00 0.040 0.030 13.5 0.75
446 min. 23.0 0.10
max. 0.2 1.5 0.75 0.040 0.030 30.0 0.50 0.25
904L min. 19.0 4.00 23.00 0.10
max. 0.20 2.00 1.00 0.045 0.035 23.0 5.00 28.00 0.25
Grade Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
304/ 304L 8.0 g/cm3 1400 Β°C (2550 Β°F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
304H 8.0 g/cm3 1400 Β°C (2550 Β°F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 40 %
310 / 310S / 310H 7.9 g/cm3 1402 Β°C (2555 Β°F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 40 %
306/ 316H 8.0 g/cm3 1400 Β°C (2550 Β°F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
316L 8.0 g/cm3 1399 Β°C (2550 Β°F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
317 7.9 g/cm3 1400 Β°C (2550 Β°F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
321 8.0 g/cm3 1457 Β°C (2650 Β°F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
347 8.0 g/cm3 1454 Β°C (2650 Β°F) Psi 75000 , MPa 515 Psi 30000 , MPa 205 35 %
904L 7.95 g/cm3 1350 Β°C (2460 Β°F) Psi 71000 , MPa 490 Psi 32000 , MPa 220 35 %
STANDARD WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
SS 304 1.4301 S30400 SUS 304 304S31 08Π₯18Н10 Z7CN18‐09 X5CrNi18-10
SS 304L 1.4306 / 1.4307 S30403 SUS 304L 3304S11 03Π₯18Н11 Z3CN18‐10 X2CrNi18-9 / X2CrNi19-11
SS 304H 1.4301 S30409 – – – – –
SS 310 1.4841 S31000 SUS 310 310S24 20Ch25N20S2 – X15CrNi25-20
SS 310S 1.4845 S31008 SUS 310S 310S16 20Ch23N18 – X8CrNi25-21
SS 310H – S31009 – – – – –
SS 316 1.4401 / 1.4436 S31600 SUS 316 316S31 / 316S33 – Z7CND17‐11‐02 X5CrNiMo17-12-2 / X3CrNiMo17-13-3
SS 316L 1.4404 / 1.4435 S31603 SUS 316L 316S11 / 316S13 03Ch17N14M3 / 03Ch17N14M2 Z3CND17‐11‐02 / Z3CND18‐14‐03 X2CrNiMo17-12-2 / X2CrNiMo18-14-3
SS 316H 1.4401 S31609 – – – – –
SS 316Ti 1.4571 S31635 SUS 316Ti 320S31 08Ch17N13M2T Z6CNDT17‐123 X6CrNiMoTi17-12-2
SS 317 1.4449 S31700 SUS 317 – – – –
SS 317L 1.4438 S31703 SUS 317L – – – X2CrNiMo18-15-4
SS 321 1.4541 S32100 SUS 321 – – – X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H – – – X12CrNiTi18-9
SS 347 1.4550 S34700 SUS 347 – 08Ch18N12B – X6CrNiNb18-10
SS 347H 1.4961 S34709 SUS 347H – – – X6CrNiNb18-12
SS 904L 1.4539 N08904 SUS 904L 904S13 STS 317J5L Z2 NCDU 25-20 X1NiCrMoCu25-20-5

Contact Neeka tubes today for a best offer & competitive quotation Of Stainless Steel Flanges

Please Call on +91 7700067892 or drop an E-Mail : sales@neekatubes.net

Stainless Steel Flanges Dimensions 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

Stainless Steel Flanges Weight Chart

CLASS Nominal Pipe Size SS Slip On Flange SS Threaded Flange SS Socket Weld Flange SS Lap Joint Flange SS Blind Flange SS Weld Neck Flange
150 lb Β½ 1 1 2 1 2 2
ΒΎ 2 2 2 2 2 2
1 2 2 2 2 2 3
1ΒΌ 3 3 3 3 3 3
1Β½ 3 3 3 3 4 4
2 5 5 5 5 5 6
2Β½ 8 8 8 8 7 10
3 9 9 9 9 9 11.5
3Β½ 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 Nominal Pipe Size Slip On Threaded Socket Weld Lap Joint Blind Weld Neck
300 lb Β½ 2 2 3 2 2 2
ΒΎ 3 3 3 3 3 3
1 3 3 3 3 4 4
1ΒΌ 4.5 4.5 4 4.5 6 5
1Β½ 6.5 6.5 6 6.5 7 7
2 7 7 7 7 8 9
2Β½ 10 10 10 10 12 12
3 13 14 13 14.5 16 18
3Β½ 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 Nominal Pipe Size Slip On Threaded Socket Weld Lap Joint Blind Weld Neck
400 lb Β½ 2 2 2 2 2 3
ΒΎ 3 3 3 3 3 3.5
1 3.5 3.5 3.5 3.5 4 4
1ΒΌ 4.5 4.5 4.5 4.5 6 4.5
1Β½ 6.5 6.5 6.5 6.5 8 8
2 8 8 8 8 10 10
2Β½ 12 12 12 11 15 14
3 15 15 15 14 20 18
3Β½ 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 Nominal Pipe Size Slip On Threaded Socket Weld Lap Joint Blind Weld Neck
600 lb Β½ 2 2 2 2 3 3
ΒΎ 3 3 3 3 4 4
1 4 4 4 4 4 4
1ΒΌ 5 5 5 5 6 6
1Β½ 7 7 7 7 8 8
2 9 9 9 9 10 12
2Β½ 13 13 13 12 15 18
3 16 16 16 15 20 23
3Β½ 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 Nominal Pipe Size Slip On Threaded Socket Weld Lap Joint Blind Weld Neck
900 lb Β½ 6 6 6 6 4 7
ΒΎ 6 6 6 6 6 7
1 7.5 7.5 7.5 7.5 9 8.5
1ΒΌ 10 10 10 10 10 10
1Β½ 14 14 14 14 14 14
2 22 22 22 21 25 24
2Β½ 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 Nominal Pipe Size Slip On Threaded Socket Weld Lap Joint Blind Weld Neck
1500 lb Β½ 6 6 6 6 4 7
ΒΎ 6 6 6 6 6 7
1 8 8 8 8 9 9
1ΒΌ 10 10 10 10 10 10
1Β½ 14 14 14 14 14 14
2 25 25 25 25 25 25
2Β½ 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 Nominal Pipe Size Slip On Threaded Socket Weld Lap Joint Blind Weld Neck
2500 lb Β½ …. 7 …. 7 7 8
ΒΎ …. 9 …. 8 10 9
1 …. 12 …. 12 12 13
1ΒΌ …. 18 …. 17 18 20
1Β½ …. 25 …. 24 25 28
2 …. 38 …. 37 39 42
2Β½ …. 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

Stainless Steel Flanges Packing & Marking

flange-packing
flanges-packing
flanges-marking
flange-marking

Packaging & Marking

Every SS flange is securely packed in wooden cases, cartons and bubble wraps to prevent damage. Traceability is ensured with size, batch number and material grade. Efficient and trustworthy delivery services ensure timely dispatches all around the world.

Quality Testing

We ensure top-notch quality through advanced testing methods. PMI testing (emission & X-ray) verifies material composition, while ultrasonic and impact testing assess strength and integrity. Tensile, hardness and roughness tests verify durability and microscopic examination with dye penetration tests detect surface faults. Also, our IGC test labs test corrosion resistance, providing reliable and durable stainless steel flanges for industrial uses.

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Industrial Application of Stainless Steel Flanges

Oil & Gas
Oil & Gas
Cement
Cement
Chemical
Chemical
Marine
Marine
Petrochemical
Petrochemical
Pharmaceuticals
Pharmaceuticals
Power Plant
Power Plant