Why is the flange bypass resistance value set at 0.03 ohms?
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The \"Code for Construction of Industrial Metal Piping Projects\" (GB 50235—2010) stipulates that for pipelines requiring electrostatic grounding, a bonding wire should be installed when the resistance value between each pair of flanges or other joints exceeds 0.03 ohms. I would like to ask everyone: where does the value of 0.03 ohms specified in the regulations come from?
It’s likely that experiments were conducted; you should bridge all of your flanges – otherwise some experts may not be able to figure it out and will ask you to make changes
The standards are copied from abroad; I’m not exactly sure how to determine them either – just design them
Just know that it needs to be used; I’m not sure exactly why either
I’ve been looking at it for a long time, but I still don’t understand why
As for how the value is determined, I don’t know, but the principle should be: 1. If the resistance is high, the electrostatic discharge effect is poor. 2. The static electricity dissipation effect is poor; in other words, the insulating property is good. As a result, the static electricity generated by friction from other devices cannot be discharged effectively, which poses a safety risk.