Blind flange of the use of technology in general use blanking panels require emergency shut-off places. There are also two-chip combination, usually installed in the pipe monolithic, put up another piece, when the need to use it in conjunction with that. Blind according to the technical and safety requirements are usually set in some of the need to make an emergency shutdown of occasions. Blind pipeline connectivity can be switched on / off status, and can easily be seen that the pipeline connectivity / off state! Blind flange plates are connected. Blind plates are generally used where the need for strict cut some cases, are generally used in more than DN50 pipeline, mainly because of the two large-diameter pipe flange plate to be inserted into a blind and hard to stay out of the line can be pulled space, so usually the pipeline are in space, and then when you want to cut off one end of the plate with a belt loop at one end, through a broken pipe is also clear.