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  • + (91) 98201 73071
  • + (91) 79778 57169
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  • Shop No. 186, Ground Floor, 182/184
    Patthe Bapurao Marg, Near Alfred
    Theater, Mumbai - 400004

Blind Flange

Blind Flange

Blind Flange

At AK Steel (India), we supply premium-grade Blind Flanges that are widely used to seal the ends of piping systems or pressure vessels. Blind Flanges allow easy access for inspection, maintenance, and future expansion of pipelines. They are suitable for high-pressure, high-temperature, and corrosive environments across industries such as Oil & Gas, Petrochemical, Power, and Water Treatment.

Manufactured from high-quality Stainless Steel, Carbon Steel, Alloy Steel, and Duplex materials, our Blind Flanges conform to international standards like ASME B16.5, ASTM, DIN, and EN. All flanges are rigorously tested for dimensional accuracy, material integrity, and surface finish. As an ISO 9001:2015 certified company, we maintain ready stock for immediate delivery.

  • Materials: SS 304/316/316L, Carbon Steel, Alloy Steel, Duplex.
  • Standards: ASME B16.5, B16.47, ASTM A182/A105.
  • Face Types: RF, FF, RTJ.
  • Manufacturing: Forged, Machined, Heat Treated.
  • Quality: EN 10204 3.1 Certified, Hydro Tested, PMI Verified.
  • Size Range: ½" to 60" (DN15 to DN1500).

Specification Table of Blind Flange

Product Name
Blind Flange (Standard, Long Face, and Custom Bore)
Stainless Steel
Grades: 304, 304L, 316, 316L, 310S, 321, 347
Standard ASTM A182 F304/304L, F316/316L
Alloy Steel
Grades: ASTM A182 F5, F9, F11, F22
Use: High Temp & Pressure Applications
Carbon Steel
Standard: ASTM A105, A350 LF2
Use: Refineries, Pipelines, Industrial Plants
Duplex & Exotic
Duplex 2205, Super Duplex 2507, Inconel 625/718, Monel 400, Hastelloy C276
Size Range
½" to 60" (DN15 – DN1500)  |  Class 150 to Class 2500
Standards
ASME B16.5, ASME B16.47 Series A/B, DIN, EN 1092-1, JIS
Types
Standard Blind, Long Face, Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Finish
Smooth Finish, Serrated Finish, Polished (SS)

Flange Weights by Pressure Class and Size in mm kg

Pipe Size (inch) 150 # 300 # 600 # 900 # 1500 # 2500 #
WN SO BLD WN SO BLD WN SO BLD WN SO BLD WN SO BLD WN SO BLD
1/2″ 2 1 1 2 1 1 2 2 2 SEE 1500 # WEIGHTS 5 4 4 7 7 7
3/4″ 2 2 2 3 3 3 4 3 3 SEE 1500 # WEIGHTS 6 5 6 8 8 8
1″ 3 2 2 4 3 3 4 4 4 SEE 1500 # WEIGHTS 9 8 8 12 11 11
1 1/2″ 4 3 3 7 6 6 8 7 8 SEE 1500 # WEIGHTS 13 12 13 25 22 23
2″ 6 5 5 9 7 8 12 9 10 SEE 1500 # WEIGHTS 25 25 25 42 37 39
2 1/2″ 8 7 7 12 10 12 18 13 15 SEE 1500 # WEIGHTS 36 36 35 52 55 56
3″ 10 8 9 15 13 16 23 16 20 31 26 29 48 48 48 94 83 86
4″ 15 13 17 25 22 27 42 37 41 53 53 54 73 73 73 145 125 130
5″ 19 15 20 32 28 35 68 63 68 86 83 87 130 130 140 245 210 225
6″ 24 19 26 42 39 50 81 80 86 110 110 115 165 165 160 380 325 345
8″ 39 30 45 67 58 81 120 115 140 175 170 200 275 260 300 580 485 530
10″ 52 43 70 91 81 124 190 170 230 260 245 290 455 435 510 1075 930 1025
12″ 80 64 110 140 115 185 225 200 295 325 325 415 690 580 690 1525 1100 1300
14″ 110 90 140 180 165 250 280 230 355 400 400 520 940 NA 975 NA NA NA
16″ 140 98 180 250 190 295 390 330 495 495 425 600 1250 NA 1300 NA NA NA
18″ 150 130 220 320 250 395 475 400 630 680 600 850 1625 NA 1750 NA NA NA
20″ 180 165 285 400 315 505 590 510 810 830 730 1075 2050 NA 2225 NA NA NA
22″ 225 185 355 465 370 640 720 590 1000 NA NA NA NA NA NA NA NA NA
24″ 260 220 430 580 475 790 830 730 1250 1500 1400 2025 3325 NA 3625 NA NA NA