Top notch Supplier of Stainless Steel Blind Flange in Mumbai, Check latest price list of PN16 Reducing Blind Flange

Blind Flange Manufacturer In India

What is Stainless Steel Blind Flange?
A stainless steel blind flange is a solid piece of steel that is designed without any bore at the center. These flanges act as blanks to cap off the line in a hydraulic system. The termination of the flow helps in rerouting, terminating, and performing any maintenance in the pipeline. The flanges have basic construction requiring minimal machining. A blind flange helps cap high-pressure fluids and gases in different industries. These flanges are usually bolted in place, enabling them to be very durable for long periods.

Threaded Blind Flange Vs Tapped Blind Flange

  • A threaded blind flange has threads on the outside of the grade that allows it to thread with interior threads in the pipeline. 
  • A tapped bling flange has threads on the inside of the flange allowing it to tap with threads on the exterior of the line.

What is the function of a blank flange?
A blank flange is used to block the section of a pipe or nozzle that is not used. These flanges help in terminating the movement of flow in the system. This allows certain sections to be repaired or modified to enhance the performance of the pipeline.

Ductile iron blind flange vs Carbon Steel Blind Flange

  • The Ductile iron blind flange is designed with a carbon content upwards of 2%. Carbon steel blind flange is designed with carbon content lower than 2% but is alloyed with other alloys.
  • Carbon steel blind flanges have higher ductility and strength compared to ductile iron blind flanges.
  • Ductile iron blind flanges have a lower cost compared to carbon grade blind flanges.

Raised Face Blind Flange vs High Hub Blind Flange

  • A raised face blind flange has a raised face that is above their bolting circle, wherein the gasket is placed to securely seal the grade.
  • A high hub blind flange has no center hold and is aligned with proper bolt holes.

Supplier of Carbon Steel Blind Flange and Titanium Reducing BLRF Flange with Metallographic examination and MTR

Blind Flange Specification

Size 1/2"NB TO 24"NB IN
Coating/Surface Treatment: Zinc Plated, Oil Black Paint, Anti-rust Paint, Yellow Transparent, Cold and Hot Dip Galvanized
Materials Monel :
Monel 400/ K500/ R-405
Hastalloy :
Hastalloy B2/ B3/ C22/ C276/ X
Nickel :
Nickel 200/ 201
Incoloy :
Incoloy 800/ 800H/ 800HT
Inconel :
Inconel 600/ 601/ 625/ 718
Stainless Steel :
ASTM A182 F304L/304/304H, F316/316L, F321, F202, F316TI, F316H, F310, F904L
Titanium :
Gr1/ Gr2/ Gr3/ Gr5/ Gr7/ Gr11
Carbon Steel :
ASTM A105N/A105, LF1, A350 LF2 CL2/CL1, LF3 CL2CL1/, A694 F46, F42, F48, F42, F50, F56, F52, F60, F70, F65, A516.65, 60, 70, C22.8
Alloy Steel :
ASTM A182 F5, F1, F9, F22, F11, F91
Duplex Steel :
ASTM / ASME A/SA 182 UNS F45, F61, F44, F53, F51, F60, F55
Class 150 LBS upto 2500 LBS DIN Standard ND-10, 6, 25, 16, 40
Value Added Service Customized Flanges, CNC Machine

Steel Blind Flange Price List

Description Price Per Kg In Singapore Price Per Kg In UAE Price Per Kg In USD Price Per Kg In Malaysia
RF16 X 300# IRON OR STEEL SS304 BLIND FLANGE SGD 722.39 UAE Dirham 1,886.25 US $521.73 MYR 2,287.58
RF16 X 150# IRON OR STEEL SS304 BLIND FLANGE SGD 421.40 UAE Dirham 1,100.32 US $304.34 MYR 1,334.43
1 X 300 STAINLESS STEEL FLANGES GR.304 H SPECTACLE BLIND RF SGD 42.23 UAE Dirham 110.26 US $30.50 MYR 133.72
DN 600 PN6 30MM THK STAINLESS STEEL FLANGES Gr.304 L BLIND FLANGE SGD 554.74 UAE Dirham 1,448.49 US $400.65 MYR 1,756.68
2 RF CARBON STEEL FORGED FLANGES - C.S. FLANGE BLIND CS SGD 5.58 UAE Dirham 14.57 US $4.03 MYR 17.67
CL.150, 1 BLIND FLANGE, RF, ASME B16.5, ASTM A182 GR. F60, FERRITIC/AUSTENITIC SGD 24.16 UAE Dirham 63.07 US $17.45 MYR 76.49

Dimensions Blind Flanges

Dimensions Blind Flanges
CLass 150 300 600 900 1500 2500
B 9.6 12.7 14.3 22.3 22.3 30.2
11.2 14.3 20.7 28.7 28.7 36.6
DIA
D
90 95 95 120 120 135
DIA
G
35.1 35.1 35.1 35.1 35.1 35.1
NO.
L
4 4 4 4 4 4
DIA
K
60.3 66.7 66.7 82.6 82.6 88.9
DIA
L
15.9 15.9 15.9 22.2 22.2 22.2
Stud Bolts Diameter x Length
Lenght
(mm)
55 65 75 110 110 120
DIA
(in)
1/2 1/2 1/2 3/4 3/4 3/4

ASME B16.5 Class 150 Blind Flange

ASME B16.5 Classes Blind Flange
Size
in mm
Size
in Inch
Flange
Thick.
RF
Height
Outer
Dia.
PCD No of
Bolts
RF
Dia.
Bolt Size
UNC
Machine Bolt
Length
RF Stud
Length
ISO Stud
Size
Hole Size Weight
in kg
B D A E C
15 1/2 9.6 2 90 60.3 4 34.9 1/2 50 55 M14 5/8 0.9
20 3/4 11.2 2 100 69.9 4 42.9 1/2 50 65 M14 5/8 0.9
25 1 12.7 2 110 79.4 4 50.8 1/2 55 65 M14 5/8 0.9
32 1 1/4 14.3 2 115 88.9 4 63.5 1/2 55 70 M14 5/8 1.4
40 1 1/2 15.9 2 125 98.4 4 73 1/2 65 70 M14 5/8 1.8
50 2 17.5 2 150 120.7 4 92.1 5/8 70 85 M16 3/4 2.3
65 2 1/2 20.7 2 180 139.7 4 104.8 5/8 75 90 M16 3/4 3.2
80 3 22.3 2 190 152.4 4 127 5/8 75 90 M16 3/4 4.1
90 3 1/2 22.3 2 215 177.8 8 139.7 5/8 75 90 M16 3/4 5.9
100 4 22.3 2 230 190.5 8 157.2 5/8 75 90 M16 3/4 7.7
125 5 22.3 2 255 215.9 8 185.7 3/4 85 95 M20 7/8 9.1
150 6 23.9 2 280 241.3 8 215.9 3/4 85 100 M20 7/8 11.8
200 8 27 2 345 298.5 8 269.9 3/4 90 110 M20 7/8 20.5
250 10 28.6 2 405 362 12 323.8 7/8 100 115 M24 1 32
300 12 30.2 2 485 431.8 12 381 7/8 100 120 M24 1 50
350 14 33.4 2 535 476.3 12 412.8 1 115 135 M27 1 1/8 64
400 16 35 2 595 539.8 16 469.9 1 115 135 M27 1 1/8 82
450 18 38.1 2 635 577.9 16 533.4 1 1/8 125 145 M30 1 1/4 100
500 20 41.3 2 700 635 20 584.2 1 1/8 140 160 M30 1 1/4 130
600 24 46.1 2 815 749.3 20 692.2 1 1/4 150 170 M33 1 3/8 196

ANSI B16.5 Class 400 Blind Flange

Size
in mm
Flange
Thick.
Size
in Inch
RF
Dia.
No of
Bolts
Outer
Dia.
RF
Height
PCD Bolt Size
UNC
Hole
Size
RF Stud
Length
ISO Stud
Size
Weight
in kg
B C A D E
15 14.3 1/2 34.9 4 95 7 66.7 1/2 5/8 75 M14 1.5
20 15.9 3/4 42.9 4 115 7 82.6 5/8 3/4 90 M16 1.5
25 17.5 1 50.8 4 125 7 88.9 5/8 3/4 90 M16 1.8
32 20.7 1 1/4 63.5 4 135 7 98.4 5/8 3/4 95 M16 2.3
40 22.3 1 1/2 73 4 155 7 114.3 3/4 7/8 110 M20 3.7
50 25.4 2 92.1 8 165 7 127 5/8 3/4 110 M16 4.6
65 28.6 2 1/2 104.8 8 190 7 149.2 3/4 7/8 120 M20 6.8
80 31.8 3 127 8 210 7 168.3 3/4 7/8 125 M20 9.1
90 35 3 1/2 N/A 8 230 7 184.2 7/8 1 140 M24 13.2
100 35 4 157.2 8 255 7 200 7/8 1 140 M24 15
125 38.1 5 185.7 8 280 7 235 7/8 1 145 M24 20
150 41.3 6 215.9 12 320 7 269.9 7/8 1 150 M24 28
200 47.7 8 269.9 12 380 7 330 1 1 1/8 170 M27 46
250 54 10 323.8 16 445 7 387.4 1 1/8 1 1/4 190 M30 71
300 57.2 12 381 16 520 7 450.8 1 1/4 1 3/8 205 M33 102
350 60.4 14 412.8 20 585 7 514.4 1 1/4 1 3/8 210 M33 132
400 63.5 16 469.9 20 650 7 571.5 1 3/8 1 1/2 220 M36 168
450 66.7 18 533.4 24 710 7 628.6 1 3/8 1 1/2 230 M36 207
500 69.9 20 584.2 24 775 7 685.8 1 1/2 1 3/4 240 M39 266
600 76.2 24 692.2 24 915 7 812.8 1 3/4 1 7/8 265 M45 405

ASME B16.5 Class 900 Blind Flange

Size in mm RF Dia. Outer Dia. Size in Inch Flange Thick. PCD RF Stud Length No of Bolts RF Height Bolt Size UNC Hole Size ISO Stud Size Weight in kg
C A B E D
15 34.9 120 1/2 22.3 82.6 110 4 7 3/4 7/8 M20 1.8
20 42.9 130 3/4 25.4 88.9 115 4 7 3/4 7/8 M20 2.7
25 50.8 150 1 28.6 101.6 125 4 7 7/8 1 M24 3.6
32 63.5 160 1 1/4 28.6 111.1 125 4 7 7/8 1 M24 4.1
40 73 180 1 1/2 31.8 123.8 140 4 7 1 1 1/8 M27 5.9
50 92.1 215 2 38.1 165.1 145 8 7 7/8 1 M24 10.1
65 104.8 245 2 1/2 41.3 190.5 160 8 7 1 1 1/8 M27 16
80 127 240 3 38.1 190.5 145 8 7 7/8 1 M24 13
100 157.2 290 4 44.5 235 170 8 7 1 1/8 1 1/4 M30 24.5
125 185.7 350 5 50.8 279.4 190 8 7 1 1/4 1 3/8 M33 39.5
150 215.9 380 6 55.6 317.5 190 12 7 1 1/8 1 1/4 M30 53
200 269.9 470 8 63.5 393.7 220 12 7 1 3/8 1 1/2 M36 91
250 323.8 545 10 69.9 469.9 235 16 7 1 3/8 1 1/2 M36 132
300 381 610 12 79.4 533.4 255 20 7 1 3/8 1 1/2 M36 189
350 412.8 640 14 85.8 558.8 275 20 7 1 1/2 1 5/8 M39 237
400 469.9 705 16 88.9 616 285 20 7 1 5/8 1 3/4 M42 273
450 533.4 785 18 101.6 685.8 325 20 7 1 7/8 2 M48 367
500 584.2 855 20 108 749.3 350 20 7 2 2 1/8 M52 463
600 692.2 1040 24 139.7 901.7 440 20 7 2 1/2 2 5/8 M64 875

Check Hastelloy C276 High Hub BLRF Flange Bolting Torque Tables, we accept small/ large orders of Raised/ Flat Face Blind Flange

Class 300 Blind Flange

Size
in mm
Size
in Inch
Outer
Dia.
RF
Dia.
Flange
Thick.
RF
Height
Weight
in kg
No of
Bolts
Machine Bolt
Length
Bolt Size
UNC
RF Stud
Length
PCD Hole
Size
ISO Stud
Size
A C B D E
15 1/2 95 34.9 12.7 2 1.4 4 55 1/2 65 66.7 5/8 M14
20 3/4 115 42.9 14.3 2 1.4 4 65 5/8 75 82.6 3/4 M16
25 1 125 50.8 15.9 2 1.4 4 65 5/8 75 88.9 3/4 M16
32 1 1/4 135 63.5 17.5 2 1.8 4 70 5/8 85 98.4 3/4 M16
40 1 1/2 155 73 19.1 2 2.7 4 75 3/4 90 114.3 7/8 M20
50 2 165 92.1 20.7 2 3.7 8 75 5/8 90 127 3/4 M16
65 2 1/2 190 104.8 23.9 2 5.5 8 85 3/4 100 149.2 7/8 M20
80 3 210 127 27 2 7.3 8 90 3/4 110 168.3 7/8 M20
90 3 1/2 230 139.7 28.6 2 9.6 8 95 3/4 110 184.2 7/8 M20
100 4 255 157.2 30.2 2 12.3 8 95 3/4 115 200 7/8 M20
125 5 280 185.7 33.4 2 15.9 8 110 3/4 120 235 7/8 M20
150 6 320 215.9 35 2 22.7 12 110 3/4 120 269.9 7/8 M20
200 8 380 269.9 39.7 2 36 12 120 7/8 140 330.2 1 M24
250 10 445 323.8 46.1 2 57 16 140 1 160 387.4 1 1/8 M27
300 12 520 381 49.3 2 84 16 145 1 1/8 170 450.8 1 1/4 M30
350 14 585 412.8 52.4 2 113 20 160 1 1/8 180 514.4 1 1/4 M30
400 16 650 469.9 55.6 2 134 20 165 1 1/4 190 571.5 1 3/8 M33
450 18 710 533.4 58.8 2 181 24 170 1 1/4 195 628.6 1 3/8 M33
500 20 775 584.2 62 2 230 24 185 1 1/4 205 685.8 1 3/8 M33
600 24 915 692.2 68.3 2 359 24 205 1 1/2 230 812.8 1 5/8 M39

ANSI B16.5 Class 600 Blind Flange

Size in mm Flange Thick. Size in Inch RF Dia. Outer Dia. No of Bolts RF Height Bolt Size UNC PCD RF Stud Length ISO Stud Size Hole Size Weight in kg
B C A D E
15 14.3 1/2 34.9 95 4 7 1/2 66.7 75 M14 5/8 1.4
20 15.9 3/4 42.9 115 4 7 5/8 82.6 90 M16 3/4 1.4
25 17.5 1 50.8 125 4 7 5/8 88.9 90 M16 3/4 1.8
32 20.7 1 1/4 63.5 135 4 7 5/8 98.4 95 M16 3/4 2.3
40 22.3 1 1/2 73 155 4 7 3/4 114.3 110 M20 7/8 3.7
50 25.4 2 92.1 165 8 7 5/8 127 110 M16 3/4 4.6
65 28.6 2 1/2 104.8 190 8 7 3/4 149.2 120 M20 7/8 6.8
80 31.8 3 127 210 8 7 3/4 168.3 125 M20 7/8 9.1
90 35 3 1/2 N/A 230 8 7 7/8 184.2 140 M24 1 13.2
100 38.1 4 157.2 275 8 7 7/8 215.9 145 M24 1 18.7
125 44.5 5 185.7 330 8 7 1 266.7 165 M27 1 1/8 31
150 47.7 6 215.9 355 12 7 1 292.1 170 M27 1 1/8 39
200 55.6 8 269.9 420 12 7 1 1/8 349.2 190 M30 1 1/4 64
250 63.5 10 323.8 510 16 7 1 1/4 431.8 215 M33 1 3/8 105
300 66.7 12 381 560 20 7 1 1/4 489 220 M33 1 3/8 134
350 69.9 14 412.8 605 20 7 1 3/8 527 235 M36 1 1/2 161
400 76.2 16 469.9 685 20 7 1 1/2 603.2 255 M39 1 5/8 225
450 82.6 18 533.4 745 20 7 1 5/8 654 275 M42 1 3/4 286
500 88.9 20 584.2 815 24 7 1 5/8 723.9 285 M42 1 3/4 368
600 101.6 24 692.2 940 24 7 1 7/8 838.2 330 M48 2 568

ASME B16.5 Class 2500 Blind Flange

Size in mm PCD Outer Dia. RF Dia. Flange Thick. RF Height Bolt Size UNC No of Bolts RF Stud Length Hole Size Size in Inch ISO Stud Size Size in Inch Weight in kg
E A C B D
15 88.9 135 34.9 30.2 7 3/4 4 120 7/8 1/2 M20 1/2 3.2
20 95.2 140 42.9 31.8 7 3/4 4 125 7/8 3/4 M20 3/4 3.7
25 108 160 50.8 35 7 7/8 4 140 1 1 M24 1 5
32 130.2 185 63.5 38.1 7 1 4 150 1 1/8 1 1/4 M27 1 1/4 7.8
40 146 205 73 44.5 7 1 1/8 4 170 1 1/4 1 1/2 M30 1 1/2 10.5
50 171.4 235 92.1 50.9 7 1 8 180 1 1/8 2 M27 2 18
65 196.8 265 104.8 57.2 7 1 1/8 8 195 1 1/4 2 1/2 M30 2 1/2 25.5
80 228.6 305 127 66.7 7 1 1/4 8 220 1 3/8 3 M33 3 39
100 273 355 157.2 76.2 7 1 1/2 8 255 1 5/8 4 M39 4 61.5
125 323.8 420 185.7 92.1 7 1 3/4 8 300 1 7/8 5 M45 5 102
150 368.3 485 215.9 108 7 2 8 345 2 1/8 6 M52 6 157
200 438.2 550 269.9 127 7 2 12 380 2 1/8 8 M52 8 241
250 539.8 675 323.8 165.1 7 2 1/2 12 490 2 5/8 10 M64 10 470
300 619.1 760 381 184.2 7 2 3/4 12 540 2 7/8 12 M72 12 575
Exporter of SS 304 Blind Flange and Inconel PN16 Blank Flange with UT, MT or PT Non-destructive testing or as required

Class 1500 Blind Flange

Size in Inch Outer Dia. RF Dia. RF Height Flange Thick. PCD Size in mm Bolt Size UNC No of Bolts RF Stud Length ISO Stud Size Hole Size Weight in kg
A C D B E
1/2 120 34.9 7 22.3 82.6 15 3/4 4 110 M20 7/8 1.8
3/4 130 42.9 7 25.4 88.9 20 3/4 4 115 M20 7/8 2.7
1 150 50.8 7 28.6 101.6 25 7/8 4 125 M24 1 3.7
1 1/4 160 63.5 7 28.6 111.1 32 7/8 4 125 M24 1 4.1
1 1/2 180 73 7 31.8 123.8 40 1 4 140 M27 1 1/8 5.9
2 215 92.1 7 38.1 165.1 50 7/8 8 145 M24 1 10.1
2 1/2 245 104.8 7 41.3 190.5 65 1 8 160 M27 1 1/8 15.9
3 265 127 7 47.7 203.2 80 1 1/8 8 180 M30 1 1/4 21.8
4 310 157.2 7 54 241.3 100 1 1/4 8 195 M33 1 3/8 33
5 375 185.7 7 73.1 292.1 125 1 1/2 8 250 M39 1 5/8 64
6 395 215.9 7 82.6 317.5 150 1 3/8 12 260 M36 1 1/2 75
8 485 269.9 7 92.1 393.7 200 1 5/8 12 290 M42 1 3/4 136
10 585 323.8 7 108 482.6 250 1 7/8 12 335 M48 2 232
12 675 381 7 123.9 571.5 300 2 16 375 M52 2 1/8 314
14 750 412.8 7 133.4 635 350 2 1/4 16 405 M56 2 3/8 443
16 825 469.9 7 146.1 704.8 400 2 1/2 16 445 M64 2 5/8 591
18 915 533.4 7 162 774.7 450 2 3/4 16 495 M72 2 7/8 795
20 985 584.2 7 177.8 831.8 500 3 16 540 M76 3 1/8 1022
24 1170 692.2 7 203.2 990.6 600 3 1/2 16 615 M90 3 5/8 1648

ASME B16.5 Blind Flange Applications

Oil & Gas Paper Defence Ports Breweries Railway
Chemical Petrochemical Oil Mills Mining Refineries Construction
Fertilizers Power Plant Shipbuilding Steel Plant Nuclear Power Offshore
Cement Sugar & Engineering Co. Government Org. etc.

Blind Flange Dimensional Tolerance

Outside Diameter of Hub
≤ 12 = + 2.4 mm / - 1.6 mm
≥ 14 = ± 3.2 mm

Drilling
Bolt Circle = 1.6 mm
Bolt Hole Spacing = ± 0.8 mm

Eccentricity of Bolt Circle
≤ 2.1/2 = 0.8 mm max.
≥ 3 = 1.6 mm max.

Thickness
≤ 18 = + 3.2 mm / - 0
≥ 20 = + 4.8 mm / - 0

Outside Diameter *
Tolerances not listed in ASME B16.5 2013
≤ 24 = 1.6 mm
> 24 = ± 3.2 mm

Length thru Hub
≤ 18 = + 3.2 mm / - 0.8 mm
≥ 20 = + 4.8 mm / - 1.6 mm

Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face
Tongue and Groove / Male-Female ± 0.4 mm

India's leading manufacturer of ASTM A105 Blind Flange, Ductile Iron Blank Flange offers own Pressure Test Facility

ASME B16.47 Series A Class 150 Blind Flange Dimensions

ASME B16.47 Series A Class 150 Blind Flange Dimensions
Number of Holes Outside Diameter (O) Nominal Pipe Size Min Thickness (T) Approximate Weight (lbs) Raised Face Diameter (R) Bolt Circle (C) Diameter of Holes
24 34.25 26 2.69 702 29.50 31.75 1.38
28 36.50 28 2.81 833 31.50 34.00 1.38
28 38.75 30 2.94 982 33.75 36.00 1.38
28 41.75 32 3.19 1238 36.00 38.50 1.62
32 43.75 34 3.25 1384 38.00 40.50 1.62
32 46.00 36 3.56 1676 40.25 42.75 1.62
32 48.75 38 3.44 1819 42.25 45.25 1.62
36 50.75 40 3.56 2040 44.25 47.25 1.62
36 53.00 42 3.81 2380 47.00 49.50 1.62
40 55.25 44 4.00 2715 49.00 51.75 1.62
40 57.25 46 4.06 2961 51.00 53.75 1.62
44 59.50 48 4.25 3350 53.50 56.00 1.62
44 61.75 50 4.38 3716 55.50 58.25 1.88
44 64.00 52 4.56 4156 57.50 60.50 1.88
44 66.25 54 4.75 4639 59.50 62.75 1.88
48 68.75 56 4.88 5130 62.00 65.00 1.88
48 71.00 58 5.06 5675 64.00 67.25 1.88
52 73.00 60 5.19 6155 66.00 69.25 1.88

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