Home » Forged Steel Flanges » ASTM A182 F304 Spectacle Blind ASME B 16.48

ASTM A182 F304 Spectacle Blind ASME B 16.48

ASTM A182 F304 spectacle blind is more often used than carbon steel spectacle blind as its great anti-corrosive function.ASME B16.48 is the standard of spectacle blinds.The two components have different functions in the piping system.

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ASTM A182 F304 spectacle blind is a type of flanges used to isolate a section of pipe system or piece of equipment when the line or equipment needs to be inspected or removed from service.ASME B 16.48 is a American Standard for spectacle blinds.


Spectacle blinds also known as figure 8 blinds because of the shape, is generally a piece of metal that is cut to fit between two pipe flanges and usually sandwiched between two gaskets.



Stainless Steel A182 F304 Spectacle Blind provides excellent performance and is used in industries such as oil and gas pipeline, heating, power plant, fabrication industry and many more. These are attached t the pipe without welding.



Shape Spectacle Blind
Size Range 1/2″ – 48″/ DN15 – DN1200
Pressure Rating Class 150, 300, 600, 900, 1500, 2500lb
Standard ASME B16.5, ASME B16.47 Series A/B, EN 1092-1, API 605, MSS SP-44, DIN 2627, DIN 2527, DIN 2558, DIN 2576, DIN 2641, DIN 2655, DIN 2656, DIN2573
Carbon Steel ASTM A105 / A105N, ASTM A350 LF2/LF3, ASTM A694 F42 / 46 / 56 / 60 / 65, P235GH, P265GH, P280GH, P355GH
Alloy Steel ASTM A182 F11 / 12 / 5 / 9 / 91 / 92
Stainless Steel ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317,347,904L, 1.4404, 1.4437.
Duplex Stainless Steel ASTM A182 F51, F53, F44


Difference Between Spectacle Blind And Spacer?

Spade and spacer combined together become a spectacle blind.When the size become bigger,the weight of the spectacle blind will be very heavy,so a spade or a spacer is more used.


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