Wemanufacture high quality Forged flanges including Blind Flange, Threaded Flange, Long Weld Neck Flange, Socket Weld Neck Flange, Slip On Flange, Spectacle Lap Joint Flange, Crankshafts, Gears, Forged Ring, Tube Sheet, Rolls, Hollow Bars and Self-Reinforced Nozzle.
SA 105, SA266 GR 1, SA266 GR 2, SA266 GR 3, SA266 GR 4, SA 350 LF1, SA350 LF2, IS 2004 CL1, IS 2004 CL2, IS 2004 CL3, IS 2004 CL4, EN 8, EN 9
SA 182 F1, SA 182 F5, SA 182 F9, SA 182 F11, SA 182 F12, SA 182 F22, SA 350 LF3, EN 19, EN 24
SA 182 F304/L/H, SA 182 F316/L/H, SA 182 F321/H, SA 182 F347/H, SA 182 F410
A spectacle blind is a piping fitting that is used for providing positive isolation.
It consists of a pair of metal discs attached to each other. These metal discs are cut to fit between two pipe flanges and usually sandwiched between two gaskets. One of the metal discs is solid and is used for blinding or isolating the pipe, during maintenance.
The other metal disc has a circular hole to match the pipe internal diameter, as shown in the figure.
The function of this disc is to allow the flow through the pipe during normal operation.