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Blind Flanges Manufacturer, BLRF Flanges Supplier & Stockists

Highly acclaimed Manufacturer & Supplier of Blind Flanges, BLRF Flanges, Carbon Steel Blind Flanges, Stainless Steel Blind Flanges, Alloy Steel Blind Flanges, Nickel Blind Flanges, Inconel Blind Flanges, Hastelloy Blind Flanges in India & Asia

We are largest manufacturers of Blind Flanges & have huge stock of 304 Blind Flanges, 316 Blind Flanges, astm a105 Blind Flanges, astm a182 Blind Flanges as per asme / ansi B16.5 blind flanges, ansi B16.47 blind flanges, Din blind flanges, jis blind flanges & uni blind flanges Standards.

we offer high quality Blind Flanges in all size, classes & dimensions like Class 150 Blind Flanges, Class 300 Blind Flanges, Class 900 Blind Flanges, Class 1500 Blind Flanges, Class 2500 Blind Flanges, pn16 blind flange dimensions & pn40 blind flange dimensions

Blind Flanges / BLRF Flanges

We are a government approved largest Manufacturer, Supplier and Exporter of ASME 16.5 Blind Flanges / BLRF Flanges. Blind flanges is a plate for covering or closing the end of a pipe. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together. Blind Flanges are commonly used in petrochemical, pipe engineering, public services & water works. This flange is used to blank off pipelines, valves and pumps, it can also be used as an inspection cover. These are available in wide variety of sizes and applications. To make these products highly suitable for various industrial applications, we are offering them in customized designs.

Type Blind Flanges, BL Flanges, ASME 16.5 Blind Flanges / BLRF Flanges
Size ½” (15 NB) to 48″ (1200NB)
Pressure Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
Material Stainless Steel Blind Flanges: ASTM A182 F202, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 316LN, 310S, 317L, 321, 410, 420, 440C, 202. F904L
Carbon Steel Blind Flanges: ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F70
Duplex Steel Blind Flanges: ASTM / ASME SA 182 F 44 , F 45 , F51 , F 53 , F 55 , F 60 , F 61.
Alloy Steel Blind Flanges: ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Blind Flanges: Duplex, Super Duplex, Nickel Alloys
Nickel Alloy Blind Flanges: Cupro Nickel (90/10, 70/30, 66/30/2/2), Hastelloy (C-4, C-22, C276, B-2), Nickel (200 / 201 / 205), Monel 400 & K500), Inconel (600, 601, 625 & 825), Incolloy (800, 800H), Alloy 20, Duplex Steel, SS 904L, Titanium (1 & 2) Etc.
Specialize As per drawing
Standard ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN
Connection Type Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue & Groove, Small Tongue & Groove.
Flanges Forms Blind Raise Face -BLRF, Weld Neck Flanges – WNRF, Socket Weld Flanges – SWRF, Slip On Raise Face – SORF, Spectacle Blind, Ring Joint, Large Dia Flanges, Orifice Flanges, Girth Flange, Lap Joint Flanges, Screwed (Threaded) Flanges, Long Weld Neck Flanges, Reducing.
Dimensions of Blind Flanges ASME B16.5
ASME/ANSI B16.5 150lb Blind Flange /Standards, Dimensions & Weight
Pipe Normal Diam. O.D. Flange Thk. Of Flange Min Diameter of Raised Face Diam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
KG LB
inch dn O C G BC BH BN BD
1/2″ 15 89.00 11.20 35.10 60.50 15.80 4 1/2″ 0.5 1.1
3/4″ 20 98.50 12.70 42.90 69.90 15.80 4 1/2″ 0.8 1.8
1″ 25 108.00 14.20 50.80 79.30 15.80 4 1/2″ 0.9 2
1-1/4″ 32 117.50 15.70 63.50 88.90 15.80 4 1/2″ 1.3 2.9
1-1/2″ 40 127.00 17.50 73.20 98.60 15.80 4 1/2″ 1.6 3.5
2″ 50 152.50 19.10 91.90 120.70 19.10 4 5/8″ 2.6 5.7
2-1/2″ 65 178.00 22.40 104.60 139.70 19.10 4 5/8″ 4.1 9
3″ 80 190.50 23.90 127.00 152.40 19.10 4 5/8″ 5..1 11.2
3-1/2″ 90 216.00 23.90 139.70 177.80 19.10 8 5/8″ 6.5 14.3
4″ 100 228.50 23.90 157.20 190.50 19.10 8 5/8″ 7.5 16.5
5″ 125 254.00 23.90 185.70 215.90 22.40 8 3/4″ 9.2 20.3
6″ 150 279.50 25.40 215.90 241.30 22.40 8 3/4″ 11.8 26
8″ 200 343.00 28.40 269.70 298.50 22.40 8 3/4″ 20.4 45
10″ 250 406.50 30.20 323.90 362.00 25.40 12 7/8″ 31 68
12″ 300 482.50 31.80 381.00 431.80 25.40 12 7/8″ 47 103
14″ 350 533.50 35.10 412.80 476.30 28.50 12 1″ 60 132
16″ 400 597.00 36.60 469.90 539.80 28.50 16 1″ 81 178
18″ 450 635.00 39.60 533.40 577.90 31.80 16 1 1/8″ 93 205
20″ 500 698.50 42.90 584.20 635.00 31.80 20 1 1/8″ 127 280
24″ 600 813.00 47.80 692.20 749.30 35.10 20 1 1/4″ 190 419

Note:
1) Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.

ASME/ANSI B16.5 300lb Blind Flange /Standards, Dimensions & Weight
Pipe Normal Diam. O.D. Flange Thk. Of Flange Min Diameter of Raised Face Diam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inch dn O C G BC BH BN BD KG/PCS LB/PCS
1/2″ 15 95.5 14.2 35.1 66.5 15.7 4 1/2″ 0.8 1.8
3/4″ 20 117. 5 15.7 42.9 82.6 19.1 4 5/8″ 1.2 2.6
1″ 25 124. 0 17.5 50.8 88.9 19.1 4 5/8″ 1.5 3.3
1-1/4″ 32 133. 5 19.1 63.5 98.6 19.1 4 5/8″ 2 4.4
1-1/2″ 40 155. 5 20.6 73.2 114.3 22.4 4 5/8″ 2.9 6.4
2″ 50 165. 0 22.4 91.9 127 19.1 8 5/8″ 3.5 7.7
2-1/2″ 65 190. 5 25.4 104.6 149.4 22.4 8 3/4″ 5.3 11.7
3″ 80 209. 5 28.4 127 168.1 22.4 8 3/4″ 7.2 15.9
3-1/2″ 90 228. 5 30.2 139.7 184.2 22.4 8 3/4″ 9.2 20.3
4″ 100 254. 0 31.8 157.2 200.2 22.4 8 3/4″ 12.2 26.8
5″ 125 279. 5 35.1 185.7 235 22.4 8 3/4″ 16 35.2
6″ 150 317. 5 36.6 215.9 269.7 22.4 12 3/4″ 22 48.4
8″ 200 381. 0 41.1 269.7 330.2 25.4 12 7/8″ 36 79.5
10″ 250 444. 5 47.8 323.9 387.4 28.4 16 1″ 55 121
12″ 300 520. 5 50.8 381 450.9 31.8 16 1 1/8″ 82.5 182
14″ 350 584. 0 53.8 412.8 514..4 31.8 20 1 1/8″ 108 238
16″ 400 647. 5 57.2 469.9 571.5 35.1 20 1 1/4″ 139 306
18″ 450 711. 0 60.5 533.4 628.7 35.1 24 1 1/4″ 178 392
20″ 500 774. 5 63.5 584.2 685.8 35.1 24 1 1/4″ 228 503
24″ 600 914. 5 69.9 692.2 812.8 41.1 24 1 1/2″ 350 772

Note:
1) Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.

ASME/ANSI B16.5 600lb Blind Flange /Standards, Dimensions & Weight
Pipe Normal Diam. O.D. Flange  Thk. Of Flange Min  Diameter of Raised Face  Diam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inch dn O C G BC BH BN BD KG/PCS LB/PCS
1/2″ 15 95.5 14.2 35.1 66.5 15.7 4 1/2″ 0.8 1.8
3/4″ 20 117. 5 15.7 42.9 82.6 19.1 4 5/8″ 1.4 3.1
1″ 25 124. 0 17.5 50.8 88.9 19.1 4 5/8″ 1.7 3.7
1-1/4″ 32 133. 5 20.6 63.5 98.6 19.1 4 5/8″ 2.4 5.3
1-1/2″ 40 155. 5 22.4 73.2 114.3 22.4 4 3/4″ 3.4 7.5
2″ 50 165. 0 25.4 91.9 127 19.1 8 5/8″ 4.4 9.7
2-1/2″ 65 190. 5 28.4 104.6 149.4 22.4 8 3/4″ 6.8 15
3″ 80 209. 5 31.8 127 168.1 22.4 8 3/4″ 8.9 19.7
3-1/2″ 90 228. 5 35.1 139.7 184.2 25.4 8 7/8″ 12.7 28
4″ 100 273. 0 38.1 157.2 215.9 25.4 8 7/8″ 18.6 41
5″ 125 330. 0 44.5 185.7 266.7 28.4 8 1″ 30.8 68
6″ 150 355. 5 47.8 215.9 292.1 28.4 12 1″ 38 83.6
8″ 200 419. 0 55.6 269.7 349.3 31.8 12 1 1/8″ 62.2 137
10″ 250 508. 0 63.5 323.9 431.8 35.1 16 1 1/4″ 102 225
12″ 300 559. 0 66.5 381 489 35.1 20 1 1/4″ 132 291
14″ 350 603. 5 69.9 412.8 527.1 38.1 20 1 3/8″ 158 348
16″ 400 686. 0 76.2 469.9 603.3 41.1 20 1 1/2″ 225 496
18″ 450 743. 0 82.6 533.4 654.1 44.5 20 1 5/8″ 285 628
20″ 500 813. 0 88.9 584.2 723.9 44.5 24 1 5/8″ 365 805
24″ 600 940. 0 101.6 692.2 838.2 50.8 24 1 7/8″ 532 1170

Note:
1) Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.

ASME/ANSI B16.5 1500lb Blind Flange /Standards, Dimensions & Weight
Pipe Normal Diam. O.D. Flange Thk. Of Flange Min Diam.
of
Hub
Diam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
Approx. Weight
inch dn O C X BC BH BN BD KG/PCS LB/PCS
1/2″ 15 120.7 22.4 38.1 82.6 22.4 4 3/4″ 1.9 4.2
3/4″ 20 130 25.4 44.5 88.9 22.4 4 3/4″ 2.7 6
1″ 25 149.4 28.4 52.3 101.6 25.4 4 7/8″ 3.7 8.1
1-1/4″ 32 158.8 28.4 63.5 111.3 25.4 4 7/8″ 4.3 9.5
1-1/2″ 40 177.8 31.8 69.9 124 28.4 4 1″ 5.9 13
2″ 50 215.9 38.1 104.6 165.1 25.4 8 7/8″ 11.3 24.9
2-1/2″ 65 244.3 41.1 124 190.5 28.4 8 1″ 16 35.2
3″ 80 266.7 47.8 133.4 190.5 25.4 8 7/8″ 19.5 43
4″ 100 311.2 53.8 162.1 235 31.8 8 1 1/8″ 33 72.8
5″ 125 374.7 73.2 196.9 279.4 35.1 8 1 1/4″ 60 132
6″ 150 393.7 82.6 228.6 317.5 31.8 12 1 1/8″ 75 165
8″ 200 482.6 91.9 292.1 393.7 38.1 12 1 3/8″ 125 275
10″ 250 584.2 108 368.3 469.9 38.1 16 1 3/8″ 215 474
12″ 300 673.1 124 450.9 533.4 38.1 20 1 3/8″ 316 697
14″ 350 749.3 133.4 495.3 558.8 41.1 20 1 1/2″    
16″ 400 825.5 146.1 552.5 616 44.5 20 1 5/8″    
18″ 450 914.4 162.1 596.9 685.8 50.8 20 1 7/8″    
20″ 500 984.3 177.8 641.4 749.3 53.8 20 2″    
24″ 600 1168.4 203.2 762 901.7 66.5 20 2 1/2″    

Note:
1) Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.

ASME/ANSI B16.5 2500lb Blind Flange /Standards, Dimensions & Weight
Pipe Normal Diam. O.D. Flange  Thk. Of Flange Min  Diam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
KG LB
inch dn O C BC BH BN BD
1/2″ 15 133.4 30.2 88.9 22.4 4 3/4″ 3 7
3/4″ 20 139.7 31.8 95.3 22.4 4 3/4″ 4.5 10
1″ 25 158.8 35.1 108 25.4 4 7/8″ 5 12
1-1/4″ 32 184.2 38.1 130 28.4 4 1″ 8 18
1-1/2″ 40 203.2 44.5 146.1 31.8 4 1 1/8″ 11 25
2″ 50 235 50.8 171.5 28.4 8 1″ 17 38
2-1/2″ 65 266.7 57.2 196.9 31.8 8 1 1/8″ 25 55
3″ 80 304.8 66.5 228.6 35.1 8 1 1/4″ 39 86
4″ 100 355.6 76.2 273.1 41.1 8 1 1/2″ 60 133
5″ 125 419.1 91.9 323.9 47.8 8 1 3/4″ 101 223
6″ 150 482.6 108 368.3 53.8 8 2″ 156 345
8″ 200 552.5 127 438.2 53.8 12 2″ 242 533
10″ 250 673.1 165.1 539.8 66.5 12 2 1/2″ 465 1023
12″ 300 762 184.2 619.3 73.2 12 2 3/4″ 665 1463

Note:
1) Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.

Dimensional Tolerances of Blind Flanges ASME B16.5
Outside Diameter
≤ 24 = 1.6 mm | > 24 = ± 3.2 mm
Inside Diameter
not applicable
Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm
Outside Diameter of Hub
≤ 12 = + 2.4 mm / – 1.6 mm | ≥ 14 = ± 3.2 mm
Diameter of Counterbore
not applicable
Drilling
Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle with Respect to Facing
≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max.
Thickness
≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0
Length thru Hub
≤ 18 = + 3.2 mm / – 0.8 mm | ≥ 20 = + 4.8 mm / – 1.6 mm
Leading manufacturer of Blind Flanges

We also having stock of Blind Flanges & other Stainless Steel Flanges, Carbon Steel Flanges, Alloy Steel Flanges manufactured by :

Erne Fittings, Austria Metal far, Italy Lame S.R.l., Italy
BENKAN Corporation, Japan BKL- Thai Benkan, Thailand TecnoForge, Italy
Ulma, Spain Mega, Italy Melesi, Italy
Interfit, France Raccortubi S.P.A., Italy

we are the distributor of the of these Brands. we also have the sales representative who can provide the proper information of these Brands & about Grades, material and sizes of Blind Flanges.

Our Live Stock of Blind Flanges
Blind Flanges Application
  • Blind Flanges uses in Oil and Gas Pipeline
  • Blind Flanges uses in Chemical Industry
  • Blind Flanges uses in Plumbing
  • Blind Flanges uses in Oil & Gas Industry
  • Blind Flanges uses in Water Supply Systems
  • Blind Flanges uses in Paper & Pulp Industry
  • Blind Flanges uses in Power Plant
  • Blind Flanges uses in Fabrication Industry
  • Blind Flanges uses in General purpose applications
  • Blind Flanges uses in Food Processing Industry
  • Blind Flanges uses in Structural Pipe
  • Blind Flanges uses in Heat Exchangers
We Have Our Sales & Support Representative in following Location
¤ USA ¤ Costa Rica ¤ Saudi Arabia
¤ Canada ¤ Italy ¤ Brazil
¤ Singapore ¤ Bahrain ¤ Malaysia
¤ Russia ¤ Venezuela ¤ Oman
¤ Sri Lanka ¤ Poland ¤ Spain
¤ Turkey ¤ Qatar ¤ Thailand
¤ Angola ¤ Chile ¤ U.A.E
¤ Egypt ¤ Indonesia ¤ Portugal
What & Where we Supply

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