ASTM A105 Blind Flange, 8 Inch (DN 200), 300 LB, ANSI B16.5, Varnished surface, RF face.

Introduction
Blind plate is mainly used to completely isolate the production medium and prevent accidents due to the lax closure of the cut-off valve. Blind plate should be set in the required isolation, such as the equipment nozzle, before and after the cut-off valve or between the two flanges, often recommended to use 8-word blind plate; for pressure, blowing and other one-time use of the part can also use the insert plate (round blind plate).

Role and Classification of Blind Boards

Blind board from the appearance, generally divided into plate plate plate blind board ,8-word blind board, insert board, and pad ring (insert board and pad ring blind to each other). The blind plate acts as isolation, cutting off, and the same as the head, pipe cap, welding plug. Because of its good sealing performance, it is generally used as a reliable isolation method for systems that need complete isolation. Plate plate blind plate is a solid circle with handle, which is used in isolated system. The 8-character blind plate, with a shape of 8 characters, one end is a blind plate and the other end is a throttle ring, but the diameter is the same as the diameter of the pipe and does not act as a throttle. The 8-word blind board is easy to use, when it needs isolation, it uses the blind board end, when it needs normal operation, it uses the throttle ring end, and can also be used to fill the installation gap of the blind board on the pipeline. Another feature is that the logo is obvious and easy to identify the installation status.