Spectacle blinds are dual-purpose plates used to isolate or open flow, with one blind end and one open ring.
Sizes: 1” to 24”, pressure classes: 150# to 1500#. Made to ASME B16.48, API 590. Materials include A516 Gr.70, A105, stainless steel. Installed between flanges.
Spectacle Blind Flange – Isolation Device for Critical Piping Systems
Spectacle blind flanges, also known as figure-8 blanks, are mechanical devices used to isolate sections of piping for maintenance or inspection. Consisting of a solid disc and a ring connected by a flat bar, the assembly can be rotated to either block the flow (blind side) or allow it (open side). Spectacle blinds are manufactured to ASME B16.48 or customer specifications, commonly used in high-pressure and high-temperature pipelines to ensure safe flow control and isolation.
