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Manufacturer of spec blind flange from European sourced raw material in India


Stainless Steel Spectacle Flanges



Stainless steel spectacle flanges specification

Size Facing Gaskets
  • 1/2" to 60"
  • DN15 - DN1400
  • PN 2.5 - PN 400
  • DN 12mm to DN 1500mm
  • Female ring-joint blanks
  • Male ring-joint blanks
  • Raised face blanks
  • Flat face blanks
  • Flat face gaskets
  • Semi-metallic gaskets
  • Ring joint gaskets
Part Of Spectacle Blind Flange Benefits of using Spectacle Blank Advantages of Spade Blind Flange
  • Double spectacle blinds
  • Weld overlay spectacle blinds
  • Bull plugs
  • Cone and threaded flange drains
  • Orifice plate spectacle blinds
  • Lugged spectacle blinds
  • Blankers and spades
  • Safety
  • Durability
  • Versatile
  • Ease of Use
  • Improved Performance
  • Time-Saving
  • No welding for installation
  • Wide range of pressure tolerances
Locations for spec blind flange installation Spectacle Blind Flange application Buying Tips Of API 590 spectacle blind
  • In bypass lines
  • At inlets and outlets of processing vessels
  • Pressure testing
  • Isolation
  • Separation
  • Re-fill
  • Pressure flow regulation
  • Valve maintenance
  • Replacement
  • Leak prevention
  • Size
  • Length
  • O.D.
  • Pressure Rating
  • End Type
  • Thickness
  • Tested
  • Style
  • Type
  • Mass
  • Materials
Available Machine Production Process Of Stainless Steel Spectacle Flange ASME Standards
  • Sand-blasting machine
  • Pushing machine
  • Press machine
  • Electric bevelling machine
  • Bending machine
  • Raw Material
  • Inspection
  • Cutting
  • Forging
  • Heat Treatment
  • Forging Rolling
  • Final Inspection
  • Rust Prevention
  • Marking
  • Heat Number
  • Packaging
  • ASME B16.48
Types of Stainless Steel Spectacle Blind Flange Pressure Class Manufacturing Origin and Standards
  • Figure 8 spectacle blind
  • Spade blind flange
  • Spectacle blind RTJ
  • Class 150
  • Class 300
  • Class 600
  • Class 900
  • Class 1500
  • Class 2500
  • ASME B16.5- USA
  • UNI 2276/ 6091 - Italy
  • AWWA - USA
  • ANSI B16.5 - USA
  • PN 10 to PN400- Europe
  • BS 10- Australia and UK
  • BS EN 1092-1 - Europe
  • Ghost - Russia
  • MSS SP44 - USA
  • DIN- Germany
  • JIS - Japan
  • API-605 - USA
Markings Formula Coating Of Carbon Steel Spectacle Blind Flange Machining Process
  • Country origin
  • Manufacturer logo
  • Size
  • Grade
  • Heat Number
  • Face type
  • Schedule
  • ASTM material
  • Pressure rating
  • Yellow paint
  • Hot dip galvanized
  • Anti-rust oil
  • Oil black paint
  • Zinc plated
  • Heat treatment
  • Forming
  • Material selection
  • Quality control
  • Forging
  • Machining
  • Surface finish
  • Material cutting
  • Shaping
  • Inspection
Test Certification Value Added Services Inspection Criteria
EN 10204 3.1
  • Marking tagging
  • Polishing
  • Cutting
  • MTR certification
  • Coating
  • Beveling end
  • Visual inspection
  • Impact test
  • Hardness test
  • Tensile test
  • Material inspection
  • PMI test
Manufacturing Style Others Name Of SS Spectacle Flange Surface
  • Plate
  • Forged
  • Cast
  • Figure 8 blind flange
  • Ring joint surface
  • Concave and convex surfaces
  • Grooved surface
  • Flat surfaces
  • Convex surfaces


Check the difference between spectacle blind flange and carbon steel spectacle flange in piping



Check difference between spectacle flange and spectacle blind flange

Check difference between spectacle flange and spectacle blind flange

API 590 spectacle blind and spectacle blank supplier in Mumbai offer hydrostatic testing with each delivery



Available of testing spec blind flange

  • Hardness test
  • Tensile test
  • Impact test
  • PMI test
  • Visual inspection
  • Material inspection

Common questions to ask about ASME B16.48 spectacle blind flange

common questions to ask about ASME B16.48 spectacle blind flange


SS spectacle blind flange price
Learn about how to choose the right figure 8 spectacle blind or line blind flange positive isolation device for your projects.

SS spectacle blind flange price

(Grade : F316L,) Price per piece in US Dollar

  • 3 inch, RF, 150#, SCH 80
  • 4 inch, RF, 150#, SCH 80
  • 6 inch, RF, 150#, SCH 80
  • 8 inch, RF, 150#, SCH 80
  • 10 inch, SCH 80, RF, CL 150
  • 12 inch, SCH 40, 150 LB, RF
  • 14 inch, SCH 40, 150 LB, RF
  • 16 inch, SCH 40, 150 LB, RF
  • US $7.35
  • US $9.43
  • US $14.92
  • US $17.96
  • US $23.02
  • US $29.59
  • US $35.65
  • US $37.59


Importance of spectacle blind flange in positive isolation

Importance of spectacle blind flange in positive isolation

Popular types of ASME B16.48 spectacle blind

Spec blind flange

Spec blind flange

Spectacle blind flange

Spectacle blind flange

Spectacle flanges

Spectacle flanges

Figure 8 spectacle blind

Figure 8 spectacle blind

Carbon steel spectacle blind flange

Carbon steel spectacle blind flange

API 590 spectacle blind

API 590 spectacle blind

Spectacle blank

Spectacle blank

Figure 8 blind flange

Figure 8 blind flange

Spectacle blind in piping

Spectacle blind in piping

Spectacle blind RJ

Spectacle blind RTJ

Spectacle blind RF

Spectacle blind RF

Spectacle line blinds

Spectacle line blinds



ASTM A105 spectacle flange price
Select your size from the online inventory of Hastelloy c276 figure 8 blind flange at the best possible price, and also see the dimension and weight chart of super duplex spade blind flange as per ASME B16.48.

ASTM A105 spectacle flange price

(Grade : F316L, SCH 80) Price per piece in US Dollar

  • 3", RF, 300#
  • 4", RF, 300#
  • 6", RF, 300#
  • 8", RF, CL 300
  • 10", RF, CL 300
  • 12", Class 150, RF
  • 14", Class 150, RF
  • 16", Class 150, RF
  • US $8.22
  • US $15.15
  • US $17.57
  • US $22.45
  • US $25.61
  • US $21.00
  • US $25.74
  • US $32.91


Stainless steel spectacle blind flange dimension

Stainless steel spectacle blind flange dimension
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Normal Pipe Size
T W D WT A B C
Wall Thickness  Width Of Web    Diameter Of Hole Thickness Of Web O.D. I.D. Center Line  
1/2 3 38 15.87 2 45 16 60
3/4 3 38 15.87 2 54 21 70
1 3 38 15.87 2 64 27 80
1.1/2 6.4 38 15.87 4 83 48 100
2 6.4 51 19.05 4 102 61 120
3 6.4 64 19.05 4 133 89 150
4 9.7 64 19.05 5 172 114 190
5 9.7 76 22.22 5 194 141 215
6 12.7 76 22.22 7 219 168 240
8 12.7 76 22.22 10276 219 300
10 15.7 102 25.4 12 337 273 360
12 19.1 102 25.4 15 406 324 430
14 19.1 108 28.57 15 448 356 475
16 22.4 108 28.57 17 511 406 540
18 25.4 114 31.75 20 546 457 580
20 25.4 121 31.75 22 603 508 635
24 31.8 140 34.92 24 714 610 750

Class 300 spectacle blind dimensions ASME B16.48

Class 300 spectacle blind dimensions ASME B16.48
Normal Pipe Size
T W D WT A B C
Wall Thickness  Width Of Web    Diameter Of Hole Thickness Of Web O.D. I.D. Center Line  
1/2 6.4 38 15.87 4 51 16 65
3/4 6.4 38 19.05 4 64 21 80
1 6.4 38 19.05 4 70 27 90
1.1/2 6.4 38 22.22 4 92 48 115
2 9.7 51 19.05 5 108 61 125
3 9.7 64 22.22 5 146 89 170
4 12.7 64 22.22 4 178 114 200
5 15.7 76 22.22 8 213 141 235
6 15.7 76 22.22 8 248 168 270
8 22.4 76 25.4 17 305 219 330
10 25.4 102 28.57 20 359 273 385
12 28.4 102 31.75 22 419 324 450
14 31.8 108 31.75 24 483 356 515
16 38.1 108 34.92 29 536 406 570
18 41.1 114 34.92 31 594 457 630
20 44.5 121 34.92 34 651 508 685
24 50.8 140 41.27 39 772 610 810


Spectacle blind weight chart

Class 150

Size in Inch Size in MM Weight in LBS
1/2 15 0.154
3/4 20 0.220
1 25 0.308
1 1/4 32 0.7716
1 1/2 40 1.01
2 50 1.49
2 1/2 65 1.54
3 80 2.42
3 1/2 90 5.37
4 100 6.19
5 130 7.42
6 150 11.88
8 200 18.34
10 250 33.15
12 300 59.41
14 350 72.62
16 400 110.82
18 450 136.22
20 500 184.46
24 600 285.05


Carbon steel spectacle blind flange pressure ratings

Temperature °F (Fahrenheit) 150 LBS 300 LBS 900 LBS 1500 LBS 2500 LBS 600 LBS
-20 to 100 720 1440 2160 3600 6000 275
200 600 1200 1800 3000 5000 230
300 540 1080 1620 2700 4500 205
400 495 995 1490 2485 4140 190
500 465 930 1395 2330 3880 170
600 435 875 1310 2185 3640 140
700 425 850 1275 2125 3540 110
800 405 805 1210 2015 3360 80
900 390 780 1165 1945 3240 50
1000 320 640 965 1605 2675 20
1050 310 615 925 1545 2570 20
1100 255 515 770 1285 2145 20
1150 200 400 595 995 1655 20
1200 155 310 465 770 1285 20
1250 115 225 340 565 945 20
1300 85 170 255 430 715 20
1350 60 125 185 310 515 20
1400 50 95 145 240 400 20
1450 35 70 105 170 285 15
1500 25 55 80 135 230 10


Spectacle blind gasket

Spectacle blind gasket

ASME B16.48 material

Inconel Spectacle Blind Flanges Incoloy Spectacle Blind Flanges Hastelloy Spectacle Blind Flanges
  • Inconel 600 : ASTM B564 UNS N06600 spectacle blind flange
  • Inconel 625 : ASTM B564 UNS N06625 spectacle flanges
  • Inconel 601 : ASTM B564 UNS N06601 figure 8 spectacle blind
  • Inconel 617 : ASTM B564 UNS N06617 spectacle blind
  • Inconel 686 : ASTM B564 UNS N06686 spectacle blank
  • Inconel 690 : ASTM B564 UNS N06690 spade blind flange
  • Inconel 725 : ASTM B564 UNS N07725 figure 8 blind flange
  • 693, MA754, 751, 706, 718, 601GC, MA758, 783, X-750, 602CA, 603XL, 718SPF
  • Incoloy 800 : ASTM B407 UNS N08800 spectacle blind
  • Incoloy 800H : ASTM B407 UNS N08810 spectacle blind in piping
  • Incoloy 800HT : ASTM B407 UNS N08811 spectacle blinds
  • Incoloy 825 : ASTM B407 UNS N08825 spectacle blind RTJ
  • 903, 907, 945, 925, 926, 832, 330, 25-6HN, DS, 028, 020,909, 945X, MA956, 908, A-286, 27-7MO, 864, 890
  • Hastelloy C22 : ASTM B366 UNS N06022 spectacle blind RF
  • Hastelloy C276 : ASTM B366 UNS N10276 spectacle blind
  • Hastelloy C2000 : ASTM B366 UNS N06200 flange spectacle
  • B-2, B, B-3, C, C-4, G-35, G-30, N, G-3, S, W, X
Monel Spectacle Blind Flanges Nickel Alloy Spectacle Blind Flanges Copper Nickel Spectacle Blind Flanges
  • Monel 400 : ASTM B564 UNS N04400 spectacle blind figure 8
  • Monel 401 : ASTM B564 UNS N04401 spectacle line blinds
  • Monel K500 : ASTM B564 UNS N05500 spectacle blind piping
  • Nickel Alloy 200 : ASTM B564 UNS N02200 spectacle blind B16.48
  • Nickel Alloy 201 : ASTM B564 UNS N02201 spectacle blind flange ASME B16.48
  • Copper Nickel 90/10 : ASTM B151 UNS C70600 spectacle blind
  • Copper Nickel 70/30 : ASTM B151 UNS C71500 figure 8 spectacle blind
Stainless Steel Spectacle Blind Flanges Carbon Steel Spectacle Blind Flanges Alloy Steel Spectacle Blind Flanges
  • ASTM A105 spectacle flange
  • ASTM A350 LF2
  • Low Temp Carbon Steel
  • ASME SA 694 F42
  • Carbon steel F46
  • A694 Grade F56
  • ASME SA694 Gr F52
  • High Yield F60
  • A694 Gr F65
  • SA 694 F70
  • Alloy Steel F1
  • A182 Gr F5
  • ASTM A182 F9
  • SA182 F11
  • ASME A182 Grade F22
  • F91 Alloy Steel
Super Duplex Spectacle Blind Flanges Duplex Spectacle Blind Flanges Titanium Spectacle Blind Flanges
  • ASME SA182 Gr F53
  • A182 Grade F55
  • SA 182 F60
  • A182 F61
  • ASME SA182 F51
  • ASTM A182 F44
  • Titanium Grade 2 : ASTM B381 UNS R50400 spectacle flange
  • Titanium Grade 5 : ASTM B381 USN R56400 spec blind flange


How to select the right stainless steel spectacle flanges for projects?

  • Design Option
  • Material
  • Size
  • Pressure Ratings
  • Connection Options 
  • Flange Faces
  • Coating & Finishes
  • Standards and End Connections
  • Weld Overlay Spectacle Blinds