Spectacle Blind - Figure 8 Blank

A Spectacle Blind is a steel plate made with a disc and ring linked by a handle. Spectacle Blind can have a different type of joint face (RF Raised Face, FF Flat Face, RTJ Ring Joint), depending on the type of flange.

The Spectacle Blind is needed in pipeline as a safety device installed between two mating flanges to enable maintenance operations. To stop the flow in the pipeline, the blind end is rotated between the flanges. On the contrary, to allow the flow the open end is rotated between the flanges.

La Meccanica Padana manufactures Spectacle Blinds from 1/2" to 60" with different type of joint face (RF, FF, RTJ) in series 150/300/600/900/1500/2500 in according to major dimensional standards and in different types of material as follow:

• Carbon steel (ASTM 105, A516 Gr. 60/65/70, A350 LF2, A694 F60-65)
• Stainless steel (AISI 304, 316, 321, 347)
• Alloy steel (AISI Gr.1, Gr.5, Gr.9, Gr.91, Gr.11, Gr.22)
• Nickel alloys
• Duplex/Super duplex (F51, F53, F55, F44)
• Incoloy (800, 800H, 800HT, 825), Alloy 20
• Hastelloy (C22, C276) 
• Cupronickel Cu-Ni
• Monel 400
• Inconel (600m 625)
• Titanium (Gr. 1, 2, 3)