Static electricity jumper
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What are the specific standards for electrostatic jumpers? How should connections be regulated?
Refer to the "General Guidelines for Preventing Static Electricity Accidents" GB12158-2006
http://bbs.hcbbs.com/viewthread.php?tid=347385&highlight=%BE%B2%B5%E7%2B%BB%E3%D7%DC For reference
I am the one who wrote it clearly. I want the specific standards for how to connect electrostatic jumpers. For example, does electrostatic bridging require all flanges with less than 5 bolts to be electrostatic bridging, or can it be done at intervals?
For pipelines transporting flammable liquids and gases, flanges with less than 5 bolts are required to have electrostatic jumpers.
According to SH3097-2000 "Petrochemical Electrostatic Grounding Design Code" 4.3 Pipeline System 4.3.1 Pipelines 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. 4.3.2 When the net distance of parallel pipes is less than 100mm, jumper wires should be added every 20m. When pipelines intersect and the clear distance is less than 100mm, jumper wires should be added. 4.3.3 When the metal flange is fastened with metal bolts or clips, it is generally not necessary to install additional electrostatic connecting wires, but it should be ensured that at least two bolts or clips have good conductive contact surfaces. 4.3.4 The heating trace pipe of the process pipe should be connected to the process pipe at the same potential at the steam inlet and return port of the trace pipe. 4.3.5 When the protective covers of air ducts and insulation layers are made of thin metal plates, they should be jointed and equipped with mechanically fixed bolts for equipotential connections. 4.3.6 The non-conductor pipe section in the middle of the metal pipe needs special anti-static treatment. The metal pipes at both ends should be connected to the grounding trunk line respectively, or should be connected to the ground with a copper core soft stranded wire with a cross-section of not less than 6mm2. 4.3.7 All metal parts on non-conductive pipe sections shall be grounded. 4.3.8 Directly buried underground metal pipelines do not need to be grounded for static electricity.
"General Guidelines for Preventing Electrostatic Accidents" GB12158-2006 "Design Specifications for Electrostatic Grounding in Petrochemical Industries" SH3097-2000 "Static Electricity Safety Inspection Regulations for Chemical Enterprises" HG/T 23003-1992