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A blind flange is a solid steel piece flange with the interior diameter, and it is primarily designed to cap off a line. These Flanges offer different features such as high tensile strength and toughness as a result of rugged construction. Also, it offers excellent thermal properties, including heat resistance, high load-bearing capacity, and durability. These Flanges are resistant to general corrosion as well as pitting and oxidation. In addition, it opposes crevice corrosion and stress corrosion cracking. This blind flange is bolted rather than welded in place.
Blind flanges are used as seal caps or Enders for pipe or their connecting pipe vessels. Looking at the structure, these Blind flanges do not have any specific hub or base. They can be attached to the end of the pipe just like a nozzle. This sealing can be both for the time being basis and for a long term basis. Blind flanges can block the contents of continuous flowing pipes for a particular period. While temporarily connected to any particular machine pipe, it can be dismantled too often to provide cleaning and space for maintaining the user. Blind flanges are suitable for various harmful working conditions irrespective of the conditions prevailing there.
Blind Flanges Dimensions
ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Blind Flanges Standard
ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Blind Flanges Size
1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Blind Flanges Class / Pressure
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Pressure Calculation in DIN
6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
Blind Flange Face Type
Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Stainless Steel Blind Flanges :
ASTM A182, F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L, SMO 254
Duplex & Super Duplex Steel Blind Flanges :
ASTM / ASME A/SA 182 F44, F45, F51, F53, F55, F60, F61 / Duplex 2205 – UNS S31803, UNS S32205 / Super Duplex 2507 – UNS S32750, UNS S32760
Carbon Steel Blind Flanges :
ASTM/ ASME A105, ASTM/ ASME A350 LF2, ASTM A694 & ASME SA694 F42 / F46 / F52 / F56 / F60 / F65 / F70
Alloy Steel Blind Flanges :
ASTM / ASME A182 F5 / F9 / F11 / F12 / F22 / F91
Inconel Blind Flanges : ASTM B564, Inconel 600 – UNS No. N06600, Inconel 601 – UNS No. N06601, Inconel 625 -UNS No. N06625, Inconel 715, Inconel 718 – UNS No. N07718, Incoloy 800 / 800H /800HT – (UNS No. N08800 / N08810 / N08811), Incoloy 825 – UNS No. N08825, Incoloy 925 – UNS No. N09925
Hastelloy Blind Flanges :
ASTM B/SB564, Hastelloy B2 – UNS No. N10665, Hastelloy B3 – UNS No. N010675, Hastelloy C4 – UNS No. N06455, Hastelloy C22 – UNS No. N06022, Hastelloy C276 – UNS No. N10276, Hastelloy C2000 – UNS No. N06200, Hastelloy X – UNS No. N06002
Nickel Blind Flanges : Nickel 200 – UNS No. N02200 , Nickel 201 – UNS No. N02201
Monel Blind Flanges :
ASME SB 564, Monel 400 – UNS No. N04400, Monel K500 – UNS No. N05500
Titanium Blind Flanges :
ASTM B381 / ASME SB381, Grade 2 – UNS No. R50400, Grade 5 – UNS No. R56400
Alloy 20 Blind Flanges :
ASTM B462 / ASME SB462 – UNS No. N08020
Class 150 Blind Flange Dimensions
Nominal Pipe Size |
"A" (O.D.) |
"B" (Thk.) |
"C" (RF Dia.) |
"D" (B.C.D.) |
# Bolt Holes |
Dia. of Bolt Holes |
Approx. Weight |
---|---|---|---|---|---|---|---|
1/2" | 3-1/2 | 7/16 | 1-3/8 | 2-3/8 | 4 | 5/8 | 2 |
3/4" | 3-7/8 | 1/2 | 1-11/16 | 2-3/4 | 4 | 5/8 | 2 |
1" | 4-1/4 | 9/16 | 2 | 3-1/8 | 4 | 5/8 | 2 |
1-1/4" | 4-5/8 | 5/8 | 2-1/2 | 3-1/2 | 4 | 5/8 | 3 |
1-1/2" | 5 | 11/16 | 2-7/8 | 3-7/8 | 4 | 5/8 | 3 |
2" | 6 | 3/4 | 3-5/8 | 4-3/4 | 4 | 3/4 | 4 |
2-1/2" | 7 | 7/8 | 4-1/8 | 5-1/2 | 4 | 3/4 | 7 |
3" | 7-1/2 | 15/16 | 5 | 6 | 4 | 3/4 | 9 |
3-1/2" | 8-1/2 | 15/16 | 5-1/2 | 7 | 8 | 3/4 | 13 |
4" | 9 | 15/16 | 6-3/16 | 7-1/2 | 8 | 3/4 | 17 |
5" | 10 | 15/16 | 7-5/16 | 8-1/2 | 8 | 7/8 | 20 |
6" | 11 | 1 | 8-1/2 | 9-1/2 | 8 | 7/8 | 27 |
8" | 13-1/2 | 1-1/8 | 10-5/8 | 11-3/4 | 8 | 7/8 | 47 |
10" | 16 | 1-3/16 | 12-3/4 | 14-1/4 | 12 | 1 | 67 |
12" | 19 | 1-1/4 | 15 | 17 | 12 | 1 | 123 |
14" | 21 | 1-3/8 | 16-1/4 | 18-3/4 | 12 | 1-1/8 | 139 |
16" | 23-1/2 | 1-7/16 | 18-1/2 | 21-1/4 | 16 | 1-1/8 | 187 |
18" | 25 | 1-9/16 | 21 | 22-3/4 | 16 | 1-1/4 | 217 |
20" | 27-1/2 | 1-11/16 | 23 | 25 | 20 | 1-1/4 | 283 |
24" | 32 | 1-7/8 | 27-1/4 | 29-1/2 | 20 | 1-3/8 | 415 |
1/16" raised face included in flange thickness. |
Class 300 Blind Flange Dimensions
Nominal Pipe Size |
"A" (O.D.) |
"B" (Thk.) |
"C" (RF Dia.) |
"D" (B.C.D.) |
# Bolt Holes |
Dia. of Bolt Holes |
Approx. Weight |
---|---|---|---|---|---|---|---|
1/2" | 3-3/4 | 9/16 | 1-3/8 | 2-5/8 | 4 | 5/8 | 2 |
3/4" | 4-5/8 | 5/8 | 1-11/16 | 3-1/4 | 4 | 3/4 | 3 |
1" | 4-7/8 | 11/16 | 2 | 3-1/2 | 4 | 3/4 | 4 |
1-1/4" | 5-1/4 | 3/4 | 2-1/2 | 3-7/8 | 4 | 3/4 | 6 |
1-1/2" | 6-1/8 | 13/16 | 2-7/8 | 4-1/2 | 4 | 7/8 | 7 |
2" | 6-1/2 | 7/8 | 3-5/8 | 5 | 8 | 3/4 | 8 |
2-1/2" | 7-1/2 | 1 | 4-1/8 | 5-7/8 | 8 | 7/8 | 12 |
3" | 8-1/4 | 1-1/8 | 5 | 6-5/8 | 8 | 7/8 | 16 |
3-1/2" | 9 | 1-3/16 | 5-1/2 | 7-1/4 | 8 | 7/8 | 21 |
4" | 10 | 1-1/4 | 6-3/16 | 7-7/8 | 8 | 7/8 | 28 |
5" | 11 | 1-3/8 | 7-5/16 | 9-1/4 | 8 | 7/8 | 37 |
6" | 12-1/2 | 1-7/16 | 8-1/2 | 10-5/8 | 12 | 7/8 | 48 |
8" | 15 | 1-5/8 | 10-5/8 | 13 | 12 | 1 | 79 |
10" | 17-1/2 | 1-7/8 | 12-3/4 | 15-1/4 | 16 | 1-1/8 | 122 |
12" | 20-1/2 | 2 | 15 | 17-3/4 | 16 | 1-1/4 | 183 |
14" | 23 | 2-1/8 | 16-1/4 | 20-1/4 | 20 | 1-1/4 | 241 |
16" | 25-1/2 | 2-1/4 | 18-1/2 | 22-1/2 | 20 | 1-3/8 | 315 |
18" | 28 | 2-3/8 | 21 | 24-3/4 | 24 | 1-3/8 | 414 |
20" | 30-1/2 | 2-1/2 | 23 | 27 | 24 | 1-3/8 | 515 |
24" | 36 | 2-3/4 | 27-1/4 | 32 | 24 | 1-5/8 | 800 |
1/16" raised face included in flange thickness. |
ANSI/ASME/ASA B16.5 600lb/sq.in. Flange BLIND-RF | |||||||
---|---|---|---|---|---|---|---|
ø | D | b | g | k | Holes | l | Kg. |
1/2" | 95,2 | 14,3 | 34,9 | 66,7 | 4 | 15,9 | 0,700 |
3/4" | 117,5 | 15,9 | 42,9 | 82,5 | 4 | 19,0 | 1,200 |
1" | 123,8 | 17,5 | 50,8 | 88,9 | 4 | 19,0 | 1,500 |
1 1/4" | 133,3 | 20,6 | 63,5 | 98,4 | 4 | 19,0 | 2,000 |
1 1/2" | 155,6 | 22,2 | 73,0 | 114,3 | 4 | 22,2 | 3,200 |
2" | 165,1 | 25,4 | 92,1 | 127,0 | 8 | 19,0 | 4,300 |
2 1/2" | 190,5 | 28,6 | 104,8 | 149,2 | 8 | 22,2 | 6,000 |
3" | 209,5 | 31,7 | 127,0 | 168,3 | 8 | 22,2 | 8,000 |
3 1/2" | 228,6 | 34,9 | 139,7 | 184,1 | 8 | 25,4 | 10,500 |
4" | 273,0 | 38,1 | 157,2 | 215,9 | 8 | 25,4 | 18,000 |
5" | 330,2 | 44,4 | 185,7 | 266,7 | 8 | 28,6 | 28,500 |
6" | 355,6 | 47,6 | 215,9 | 292,1 | 12 | 28,6 | 35,500 |
8" | 419,1 | 55,6 | 269,9 | 349,2 | 12 | 31,7 | 58,000 |
10" | 508,0 | 63,5 | 323,8 | 431,8 | 16 | 34,9 | 98,000 |
12" | 558,8 | 66,7 | 381,0 | 488,9 | 20 | 34,9 | 125,000 |
14" | 603,2 | 69,8 | 412,7 | 527,0 | 20 | 38,1 | 151,000 |
16" | 685,8 | 76,2 | 469,9 | 603,2 | 20 | 41,3 | 215,000 |
18" | 742,9 | 82,5 | 533,4 | 654,0 | 20 | 44,4 | 287,000 |
20" | 812,8 | 88,9 | 584,2 | 723,9 | 24 | 44,4 | 366,000 |
22" | 869,9 | 95,2 | 641,2 | 777,9 | 24 | 47,6 | 437,000 |
24" | 939,8 | 101,6 | 692,1 | 838,2 | 24 | 50,8 | 532,000 |
ASME/ ANSI B16.5 1500lb Blind Flange
Pipe Normal Diam. | O.D. Flange | Thk. Of Flange Min | Diam.ofHub | Diam.of BoltCircle | Diam.of BoltHoles | Numberof Bolts | Diam. ofBolts(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 |
Nominal Pipe Sizes (NPS) | Slip On (SORF) | Threaded (NPT) | Socket Weld (SWRF) | Lap Joint (Loose) | Blind (BLRF) | Weld Neck (WRNR) |
---|---|---|---|---|---|---|
½ | 1 | 1 | 2 | 1 | 2 | 2 |
¾ | 2 | 2 | 2 | 2 | 2 | 2 |
1 | 2 | 2 | 2 | 2 | 2 | 3 |
1¼ | 3 | 3 | 3 | 3 | 3 | 3 |
1½ | 3 | 3 | 3 | 3 | 4 | 4 |
2 | 5 | 5 | 5 | 5 | 5 | 6 |
2½ | 8 | 8 | 8 | 8 | 7 | 10 |
3 | 9 | 9 | 9 | 9 | 9 | 11.5 |
3½ | 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 |
Suppliers of ASME B16.5 Blind Flanges
Super Duplex Steel BLRF Flange Manufacturer
Hastelloy RFBL Flange
Alloy 20 Blind Flange Supplier in India
ASTM A403 SS Blind Flanges
Blind Flanges at Best Price
BLRTJ Flanges Exporters
Super Duplex Steel Blind Flanges
Copper Nickel Blind Flange Stockholder
Titanium Blind Flanges in India
High Nickel Alloy Blind Flanges Supplier
Blind Raised Face Flange In Mumbai
Austenitic Stainless Steel Blind Flange
Class 300 Blind Flanges Exporter
ANSI B16.5 Class 150 Blind Flanges Stockist
ANSI B16.5 Inconel Raised Face Blind Flange
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