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Stainless Steel Spectacle Blind ASME B 16.48

Stainless steel spectacle blind has better anti-corrosive function than other material of spectacle blinds.ASME B 16.48 is a commonly used standard for spectacle blindThe joint face can be RF (Raised Face), FF (Flat Face), RTJ (Ring Joint),it is depend on the type of flanges.

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What is a stainless steel spectacle blind?

Stainless steel 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 B16.48 Standard is a American standard for spectacle blinds,is also the most used standard.

Spec blinds have two components:a paddle blank (also called as a spade or slip blind),has a usage to close the piping system;a paddle spacer(also called as a spacer ring),the ring must matches the inside diameter of the connected pipes.

 

Types Of Joint Face:

RF (Raised Face), FF (Flat Face), RTJ (Ring Joint)

The joint face is depends on the type of flange.

 

Advantage:

Spectacle binds provide permanent connection and long-term using period.

These spectacle blinds are easy to inspection and maintenance.

 

Disadvantage:

This is more evident in large or complex piping systems where the weight of multiple blinds could quickly add unacceptable stresses to the overall design.

Spectacle blinds can manufactured up to 24-inches according to the ASME B16.48 Standard,but the usage is typically limited to spectacle up to 16-inches.

 

SPECIFICATION

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

 

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