Where on the process piping is anti-static protection required?
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I’ve never understood which parts of the piping need to be anti-static. We use ordinary wires for these connections; what methods can be used to prevent static electricity?
So the valves on the pipeline. For control valves, flow meters, solenoid valves, and other components that use gaskets, they should all be connected using copper wires; this is what we refer to as copper wire bridging. Once connected in this way, static electricity can be directed to a single point where it can be eliminated.
For pipes that require static grounding (the pipes here are lined with PTFE), conductivity should exist between each section of the pipe. When the resistance value between each pair of flanges or threaded joints exceeds 0.03 ohms, a wire bridge should be installed. The earth resistance value of the piping system should exceed 100 ohms in order to require an earth lead.