Selection of flange static bonding wires
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What kind of wire should be chosen for flange static bonding? Are there any relevant requirements? I searched on Baidu for a long time but couldn’t find it.
\"General Diagram for the Installation of Static Grounding in Chemical Enterprises\" CD90B4-88; this standard is based on the \"Design Code for Static Grounding in Chemical Enterprises\" HG/T20675-1990, which is quite old
Thank you; I’ll take the time to study it properly and find the answers. Is there a direct answer? The jumper wires in our device break easily; I suspect the wrong jumper wires were chosen.
Take a look at the standard on floor 10 of that post. . . Doesn’t the flange with a metal gasket require an electrostatic bonding? - Powered by Discuz! http://bbs.hcbbs.com/thread-1280458-1-1.html
GB50235-97 seems to specify that the bypass resistance should not exceed 0.03 ohms; copper sheets are generally used for this purpose； Copper wires with an interface area of more than 6 square units should be used at both ends of the unloading hose.
Such thin wires are bound to break easily. The standards I’m referring to are quite old; I’ve seen some factories use aluminum sheets and cut them on site themselves. According to the \"Code for Pressure Piping – Industrial Piping: Fabrication and Installation\" GB/T20801.4-2006, for pipelines that require electrostatic grounding, a wire bridge must be installed whenever the resistance value between each pair of flanges or threaded connections is greater than 0.03Ω. With some flexibility, as long as this requirement is met, any material can be used for making the bypass connection.
Our company uses copper wires of that type – small, thin strands of copper covered with yellow insulation; their diameter is about two to three millimeters. The ends are secured using black tape provided by the electrical supply company. It looks very fragile, as if it could break with just a little force. Anyway, it’s just doing static discharge bonding day after day, over and over again. I asked the electrical department, and they said corrosion protection needs to be taken into consideration. Aren’t those wide ones not resistant to corrosion? According to the specifications, for certain materials, connection cannot be achieved using flange bolts; instead, it must be done through static discharge straps welded to the pipes. I was wondering if there are any wide electrostatic bonding connectors that use electrostatic bonding plates for connection, ones that at least look quite sturdy?