Source of specification???
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When the net distance of parallel pipes is less than 100mm, jumper wires should be added every 20m. When pipelines cross and the clear distance is less than 100mm, jumper wires should be added. 1 Pipes should be grounded at the entrance and exit of the device area (including the production workshop building) and at the bifurcation. Long-distance unbranched pipelines should be grounded every 100m. This post was last edited by Fei Guohai on 2009-2-12 17:23 ]
It comes from points 4.3.1 and 4.3.2 of 4.3 piping system of SH3097-2000 "Petrochemical Electrostatic Grounding Design Code". PS: If you have this kind of problem, you can search it by BAIDU yourself.