Difference of eight blind plate and the flange

Eight blind flange in practical applications is a pipe, structure is half is blind flange is iron ring.
Eight of blind flange is often used in the change process of piping flange, choose your horoscope blind flange can choose according to line pressure and piping medium are compared.Ordinary blind flange and a piece is needed in the process of using the same pressure, pipe diameter, the same as sealing face flashboard used, mainly purpose is to eliminate the blind flange removed after out of the gap.TitaniumCn
Eight words in comparison with the blind flange of blind flange and ordinary, and switching operation, don't need eight blind plate will be removed, only need to change the cross section is ok, can avoid the blind flange of cracks in the pipeline.In the actual application of the most used is the figure of eight blind plate, should be used when using matching flange sealing surface.
If the device used in blind moderators to purge and maintenance convenient material to cut off the role, usually recommended eight blind plate, using the blind flange can be convenient to check its correctness, also won't lose the other half of the blind flange, guarantee the safety of use.If the blind flange diameter is larger or stress level is higher under the condition of using single blind plate, use should be backup when the other half, convenient for the scene change.Eight blind flange and ordinary blind plate no difference in essence, to say the difference is when the pipe diameter is larger, eight volume and weight of the blind flange is larger, is not convenient to disassemble, so this time often use common blind plate to instead.

In practical engineering environment how to choose the blind plate and the eight blind flange?
The role of the blind flange is cut off, and closed.For often conditions often in isolation of pipe system.
And eight blind plate as the name implies, its shape is like a figure 8 it is blind plate at one end, another end is made from a mix of throttling ring, when conveying fluid, use of throttling ring, cut with blind flange, a bit like the role of the cut-off valve, it can be used to cut off when the valve leakage.The sealing performance is better.For need complete isolation system, generally choose as a reliable means of isolation.Eight words before and after the blind flange should have 2 stop valve, all closed, the exchange of eight blind state.Common heat exchanger putting-in-service proactively and standby, reactor putting-in-service proactively and standby, nitrogen gas pipeline and process pipeline connection and so on.Another characteristic is the logo clear, easy to identify the status of installation.
Eight major role in the blind flange is completely separate, like a 100% reliable performance, will not be wrong operation of the gate.
General purpose:
1. The system class medium pipeline such as pipeline and oil steam purging process sound isolation effect between medium pipeline, at this time, eight blind flange shall be installed at the side of the medium of the pipe near the system.Of course to eight online remove blind flange, side near the process medium pipe should be gate partition, blind flange general flag is often such a figure 8.
2. Flammable or toxic medium pipeline in and out of the device should be installed double gate valve, in double gate valve, eight installed such eight blind general mark is always open.
3. The device internal use while driving, and driving after normal no longer through the medium of pipe gate valves should be installed, and eight blind plate installed in the normal side five medium circulation piping, eight blind general flag is often shut.
Choose eight blind flange should pay attention to and clamping, flanges matching of clamping with the bolt length should be extended appropriately according to the blind flange thickness.