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Blind Flanges

Inconel Blind Flange, Ready Stock Of Raised Faced Blind Flanges, EN1092-1 BLRF Flanges, Stainless Steel Blind Flanges, Manufacturer of Flat Faced Blind Flanges, ANSI B16.5 Class 150 BLFF Flanges Supplier in Mumbai.

Unifit Metal Alloys is a distinguished supplier and distributor of Blind Pipe Flanges, which is a high grade austenitic steel with excellent rust resistance. However, corrosion resistance is restricted unless it is improved further through procedures such as hardening, tempering, and polishing. Because of the high carbon concentration in this Inconel Alloy Blind Flanges, chromium carbide compounds develop, giving exceptional wear protection and edge retention when hardened. However, using this product at these higher operating temps results in a significant decrease in tensile strength and hardness, with a following rise in ductility. When heated to 1500 degrees Fahrenheit or higher, they will harden to some extent unless gently chilled to below the crucial temperature. It undergoes heating at temperatures ranging from 1200 to 1400 degrees Fahrenheit (649 to 760 degrees Celsius), followed by air chilling.

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Table of Content

API 6A BLRF Flange, ASTM A182 SS Blind Flange, Inconel Raised Face Blind Flange, Nickel Alloy Blind Plate Flanges, Alloy 20 BLRTJ Flanges, Flat Faced Blind Flanges, Carbon Steel Blind Flange, ANSI B16.5 Blind Flanges Manufacturer In Mumbai, India.

Monel Alloy Blind Flanges is not suggested in its annealed state because it has weak corrosion performance. It is impervious to weather, precipitation, and certain chemicals.It has reasonable cool working characteristics and can be drawn and formed fairly when annealed. When strength, hardness, and/or abrasion resistance must be coupled with corrosion resistance, this steel is used. They should be evenly heated to 2000°F / 2200°F (1095°C / 1205°C), based on the degree of deformation, then forged and air chilled. After heat treatment, this steel has exceptional hardness and can be used to fabricate extremely stressed components. It is extremely helpful for specifics in the aquatic environment, chemical, and medicinal industries.

Furthermore, due to the minimal alloy composition, Hastelloy Alloy Blind Flanges provide exceptional high temperature oxidation and scaling protection while remaining cost effective. It is not suggested for use at sub-zero temps due to a significant decrease in impact properties, which is typical of most steels other than austenitic steel varieties. Because post-weld annealing is advised to maintain maximum ductility, it is recommended to pre-heat the work piece to 350°F to 400°F (177°C to 204°C) to minimize the risk of cracking. Tempering this steel between 750 and 1050 degrees Fahrenheit reduces its impact hardness and slightly reduces its rust resistance.

Blind Flanges

Get a best quote for SS BLRF Flanges, We Keep Bulk Stock of Raised Face Blind Flanges at our stockyard, contact us to request a quote.

Blind Flanges Specifications

Size Chart 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Standards ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ASME Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ASME B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
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 Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized
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 Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & 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
Test Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
Equipment Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Origin Indian / West Europe / Japan / USA / Korean
Manufacturer of

ASME DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
ANSI B16.5 Class 150 Blind Flanges: -BS Flange, EN Flange, API 6A Flanges, ASME Flanges, ASME Flanges, DIN Flanges, EN1092-1 Flanges, UNI Flanges, JIS/ KS Flanges, BS4504 Flanges, GB Flanges, AWWA C207 Flanges, GOST Flanges, PSI Flangse

  • B.S: BS4504 , BS3293, BS1560, BS10
  • AS 2129: Table D; Table E; Table H
  • ASME B16.5, ASME B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
  • ASME : ASME B16.5, ASME B16.47(API605), MSS SP44, ASME B16.36, ASME B16.48
  • ASME B16.5, ASME B16.47, MSS SP44, ASME B16.36, ASME B16.48
  • American standard (ANSI)
  • German (DIN)
  • British standard (BS)
  • 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 ANSI B16.5 Class 150 Blind Flanges
  • The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
Uses & Application
  • Bitumen upgraders.
  • Heavy oil refineries.
  • Nuclear power (mostly seamless).
  • Petrochemicals and acids.

Material Grades of Blind Flanges

Stainless Steel Blind Flanges ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409
Carbon Steel Blind Flanges ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80)
Alloy Steel Blind Flanges ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
Titanium Blind Flanges ASTM B381 / ASME SB381, Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7
ASTM R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 | R53400/GR.12 | R56320/GR.9 |R56400/GR.5
Copper Blind Flanges T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910,C10920, TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000,C12200, C12300, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Copper Nickel Blind Flanges ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Inconel Blind Flanges ASTM B564 / ASME SB564, Inconel 600, 601, 625, 718, 783, 690, x750 ANSI B16.5 Class 150 Blind Flanges
Hastelloy Blind Flanges ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X Flanges
Monel Blind Flanges ASTM B564 / ASME SB564, Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Alloy 20 Blind Flanges ASTM B462 / ASME SB462, Carpenter® 20 Alloy, Alloy 20Cb-3
Aluminium Blind Flanges 5052 /6061/ 6063 / 2017 / 7075 / etc.
Nickel Alloy Blind Flanges ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Duplex Steel Blind Flanges S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex Blind Flanges S32750 / S32760 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Incoloy Blind Flanges ASTM B564 / ASME SB564, Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925 Flanges
254 SMO Blind Flanges ASTM A182 / ASME SA182, SMO 254/6Mo, UNS S31254, DIN 1.4547
Nimonic Blind Flanges Nimonic 75, Nimonic 80A, Nimonic 90
Brass Blind Flanges 3602 / 2604 / H59 / H62 / etc.
Other Blind Flanges material Tin bronze, Alumunum bronze, Lead bronze

Dimensions of Blind Flanges

ANSI/ASME/ASA B16.5 150lb/sq.in. Flanges
ø D b g m J h k Holes l Kg.
1/2" 88,9 11,1 34,9 30,2 22,3 15,9 60,3 4 15,9 0,400
3/4" 98,4 12,7 42,9 38,1 27,7 15,9 69,8 4 15,9 0,700
1" 107,9 14,3 50,8 49,2 34,5 17,5 79,4 4 15,9 0,800
1 1/4" 117,5 15,9 63,5 58,8 43,2 20,6 88,9 4 15,9 1,100
1 1/2" 127,0 17,5 73,0 65,1 49,5 22,2 98,4 4 15,9 1,400
2" 152,4 19,0 92,1 77,8 62,0 25,4 120,6 4 19,0 2,200
2 1/2" 177,8 22,2 104,8 90,5 74,7 28,6 139,7 4 19,0 3,600
3" 190,5 23,8 127,0 107,9 90,7 30,2 152,4 4 19,0 4,100
3 1/2" 215,9 23,8 139,7 122,2 103,4 31,7 177,8 8 19,0 5,200
4" 228,6 23,8 157,2 134,9 116,1 33,3 190,5 8 19,0 5,600
5" 254,0 23,8 185,7 163,6 143,8 36,5 215,9 8 22,2 6,300
6" 279,4 25,4 215,9 192,1 170,7 39,7 241,3 8 22,2 7,500
8" 342,9 28,6 269,9 246,1 221,5 44,4 298,4 8 22,2 12,600
10" 406,4 30,2 323,8 304,8 276,3 49,2 361,9 12 25,4 18,500
12" 482,6 31,7 381,0 365,1 327,1 55,6 431,8 12 25,5 28,000
14" 533,4 34,9 412,7 400,0 359,1 57,1 476,2 12 28,6 36,000
16" 596,9 36,5 469,9 457,2 410,5 63,5 539,7 16 28,6 46,000
18" 635,0 39,7 533,4 504,8 461,8 68,3 577,8 16 31,7 50,000
20" 698,5 42,9 584,2 558,8 513,1 73,0 635,0 20 31,7 64,000
22" 749,3 46,0 641,2 609,6 564,4 79,4 692,1 20 34,9 72,000
24" 812,8 47,6 692,1 663,6 615,9 82,5 749,3 20 34,9 89,000
ANSI/ASME/ASA B16.5 600lb/sq.in. Flanges
ø D b g m J h k Holes l Kg.
1/2" 95,2 14,3 34,9 38,1 22,3 22,2 66,7 4 15,9 0,800
3/4" 117,5 15,9 42,9 47,6 27,7 25,4 82,5 4 19,0 1,400
1" 123,8 17,5 50,8 54,0 34,5 27,0 88,9 4 19,0 1,600
1 1/4" 133,3 20,6 63,5 63,5 43,2 28,6 98,4 4 19,0 2,100
1 1/2" 155,6 22,2 73,0 69,8 49,5 31,7 114,3 4 22,2 3,100
2" 165,1 25,4 92,1 84,1 62,0 36,5 127,0 8 19,0 3,700
2 1/2" 190,5 28,6 104,8 100,0 74,7 41,3 149,2 8 22,2 5,400
3" 209,5 31,7 127,0 117,5 90,7 46,0 168,3 8 22,2 7,300
3 1/2" 228,6 34,9 139,7 133,3 103,4 49,2 184,1 8 25,4 8,900
4" 273,0 38,1 157,2 152,4 116,1 54,0 215,9 8 25,4 11,800
5" 330,2 44,4 185,7 188,9 143,8 60,3 266,7 8 28,6 24,500
6" 355,6 47,6 215,9 222,2 170,7 66,7 292,1 12 28,6 29,500
8" 419,1 55,6 269,9 273,0 221,5 76,2 349,2 12 31,7 43,000
10" 508,0 63,5 323,8 342,8 276,3 85,7 431,8 16 34,9 70,000
12" 558,8 66,7 381,0 400,0 327,1 92,1 488,9 20 34,9 86,000
14" 603,2 69,8 412,7 431,8 359,1 93,7 527,0 20 38,1 100,000
16" 685,8 76,2 469,9 495,3 410,5 106,4 603,2 20 41,3 142,000
18" 742,9 82,5 533,4 546,1 461,8 117,5 654,0 20 44,4 175,000
20" 812,8 88,9 584,2 609,6 513,1 127,0 723,9 24 44,4 232,000
22" 869,9 95,2 641,2 666,7 564,4 133,3 777,9 24 47,6 292,000
24" 939,8 101,6 692,1 717,5 615,9 139,7 838,2 24 50,8 330,000

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ASME B16.5 Blind Flange Weight Chart

Rated Diameter O.D. of Pipe Flange Parameter Neck Size Size of R.F. Bolts Approx. Weight
DN d1 D d5 b k h d3 r d4 f No. of
holes		 d2 KG
10 17.2 90 17.7 14 60 20 30 4 40 2 4 14 0.56
15 21.3 95 22 14 65 20 35 4 45 2 4 14 0.62
20 26.9 105 27.6 16 75 24 45 4 58 2 4 14 0.91
25 33.7 115 34.4 16 85 24 52 5 68 2 4 14 1.09
32 42.4 140 43.1 16 100 26 60 5 78 2 4 18 1.58
40 48.3 150 49 16 110 26 70 5 88 3 4 18 1.76
50 60.3 165 61.1 18 125 28 85 5 102 3 4 18 2.39
65 76.1 185 77.1 18 145 32 105 5 122 3 4 18 3.1
80 88.9 200 90.3 20 160 34 118 5 138 3 8 18 3.77
100 114.3 220 115.9 20 180 38 140 5 158 3 8 18 4.29
125 139.7 250 141.6 22 210 40 168 5 188 3 8 18 5.86
150 168.3 285 170.5 22 240 44 196 5 212 3 8 22 7.22
175 193.7 315 196.1 24 270 44 224 6 242 3 8 22 9.18
200 219.4 340 222 24 295 44 247 6 268 3 8 22 9.95
250 273 395 276 26 350 46 300 6 320 3 12 22 12.69
300 323.9 445 327 26 400 46 352 6 370 4 12 22 14.4
350 355.6 505 359 26 460 53 398 10 430 4 16 22 22.36
400 406.4 565 410 26 515 57 448 10 482 4 16 26 26.85
450 457 615 461 28 565 62 502 10 532 4 20 26 32.53
500 508 670 512 28 620 67 552 10 585 4 20 26 37.84
600 610 780 614 28 725 75 658 10 685 5 20 30 49.32
700 711 895 716 30 840 77 760 10 800 5 24 30 63.86
800 813 1015 818 32 950 84 864 10 905 5 24 33 85.19
900 914 1115 920 34 1050 88 969 10 1005 5 28 33 101.4
1000 1016 1230 1022 34 1160 92 1071 10 1110 5 28 36 119.7

Ready Stock of Blind Flanges

  • SS Blind Flange
  • Duplex Steel Raised Face Blind Flanges
  • ANSI B16.5 Class 150 Blind Flanges
  • Hastelloy Flat Faced Blind Flanges
  • Carbon Steel BLRF Flanges
  • Super Duplex Steel Blind Flange
  • Stainless Steel Blind Flanges
  • ASTM A182 Stainless Steel BLRTJ Flange
  • DIN-PN16 Steel BLFF Flanges
  • High Quality Blind Flange
  • Blind Plate Flanges
  • Copper Nickel Blind Pipe Flanges

  • Class 150 Blind Flange
  • Titanium Blind Flanges
  • ANSI B16.5 BLFF Flange
  • Hastelloy Blind Raised Face Flanges
  • Class 600 BLRF Flange Stockist
  • Duplex Steel 2205 Blind Flange
  • 254 SMO Blind Flange Supplier
  • ANSI B16.5 class 150 BLRF Flange
  • High Nickel Alloy Blind Flanges
  • Alloy 20 BLRTJ Flanges
  • Super Duplex 2507 BLFF Flanges
  • Blind Plate Flanges

Blind Flanges Application Industries

Application Industries

Refineries

90%

Oil and Gas Industry

96%

Power Generation

80%

Pharmaceutical Equipment

85%

Pulp & Paper Industry

88%