Spectacle Blind Flange
A spectacle blind combines a solid plate and an open ring linked together. Repositioning the assembly provides a visible means of selecting isolation or an open flow path.
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Specification options
Final selection depends on the project specification and confirmed quotation.
Connection
Linked blind plate and open spacer ring
Material options
Carbon steel ASTM A105 / A350 LF2; stainless steel ASTM A182 F304/F304L/F316/F316L; alloy grades to specification.
Dimensional standard
ASME B16.5 / B16.47 as applicable to flange size and type. Spectacle blinds and orifice assemblies require their own applicable project standard.
Rating and facing
Specify the required pressure class or PN rating and compatible RF, FF or RTJ facing. Availability depends on type and size.
Dimensions
Nominal size, bore, wall thickness, bolt drilling and finish to the applicable standard or approved drawing.
Applications
Positive line isolation during shutdown and maintenance
Information for your enquiry
Provide flange type, nominal size, material grade, standard, pressure class, facing, pipe bore or schedule, quantity and inspection requirements.
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