The blind plate is mainly used to completely isolate the production medium and prevent the production from being affected or even causing accidents due to the loose closing of the shut-off valve. The blind plate should be set at the position requiring isolation, such as the nozzle of the equipment, the front and rear of the cut-off valve or between the two flanges. It is often recommended to use the 8-shaped blind plate; for the disposable parts such as pressure suppression and purging, the plug-in plate (round blind plate) can also be used.
Function and classification of blind plate
From the appearance, the blind plate is generally divided into plate plate blind plate, 8-shaped blind plate, plug-in plate, and backing ring (the plug-in plate and gasket ring are blind to each other). The blind plate is used for isolation and cutting, which is the same as that of head, cap and welding plug. Because of its good sealing performance, it is generally used as a reliable isolation method for the system that needs complete isolation. The plate plate blind is a solid circle with a handle, which is used in the isolated system under normal conditions. The 8-shaped blind plate is shaped like an 8-shaped blind plate, one end is a blind plate, and the other end is a throttling ring. However, the diameter of the blind plate is the same as that of the pipe, so it does not play a throttling role. The 8-shaped blind plate is easy to use. When isolation is required, the blind end is used. When normal operation is required, the throttling ring end is used. At the same time, it can also be used to fill the installation gap of blind plate on the pipeline. Another feature is that the logo is obvious, easy to identify the installation status.
| Carbon Steel Weld Neck Flange | ASTM/ASME A/SA105 A/SA105N & A/SA216-WCB, DIN 1.0402, DIN 1.0460, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, High Yield CS ASTM A694 / A694 (F52 F56 F60 F65 F70 F80) |
| Stainless Steel Weld Neck Flange | ASTM/ASME A/SA182 F304, F304L, F316, F316L, ASTM/ASME A/SA351 CF8, CF3, CF8M, CF3M, DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409 |
| Alloy Steel Weld Neck Flange | ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91
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