The significance of installing 8-character blind flanges in the battery limit
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Hello everyone. According to Petrochemical Code 7.2.16: For pipelines carrying flammable gases, liquefied hydrocarbons, and flammable liquids entering and exiting a facility, block valves and figure-8 blind flanges shall be installed at the facility boundary. A platform must be provided at the location of the block valve; for platforms with a length of 8 meters or more, ladders must be installed in both directions. It makes sense to add block valves. But what is the purpose of adding a figure-8 blind flange, and how should it be installed?
The 8-shaped blind flange is primarily used for the safe isolation of piping systems. Its purpose is to effectively cut off the flow of media during pipeline maintenance or inspection, thereby preventing any unintended leaks and ensuring the safety of the work area. The figure-8 blind flange should be installed on one side of the isolation valve; it is typically used in conjunction with the isolation valve to provide double protection. During installation, it is necessary to ensure that the figure-8 blind flange matches the pipe diameter and is tightly sealed to prevent any leaks. .
According to the specifications, shut-off valves must be installed on the inlet and outlet pipes; during maintenance, must 8-shaped blind flanges also be added?
The valve may have internal leakage; therefore, an 8-shaped blind flange is used for isolation, creating a double-layer barrier
This is understandable; in reality, this is what needs to be done! The current problem is that the experts are asking us to install figure-8 blind flanges on the inlet and outlet pipes of our equipment during its normal operation
The purpose of the figure-8 blind flange is to absolutely and reliably isolate the medium when it is uncertain whether the valve is reliable or not.
Achieve maintenance objectives more quickly and safely
Setting of 8-character blind flanges in the battery limit: completely isolated
Normally, it’s necessary to install them; the figure-8 blind flange makes it easier to check whether the blind flange has been properly installed during inspections and maintenance, as well as to verify before production that it has been removed. This is the purpose of the figure-8 blind flange