Anti-static bonding issues for pipeline flanges
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The installation documentation from the design institute states that, for pipelines with static electricity grounding requirements, good electrical conductivity exists between each section. When the resistance value between each pair of flanges or threaded joints is greater than 0.03Ω, a wire jumper shall be provided. My question is: during the construction of the production workshop, should one measure the resistance between the flanges first before deciding whether to install a bypass wire? If the resistance value is greater than 0.03Ω, should we purchase more materials and arrange for someone to carry out the installation?
Yes, based on the information you provided, during installation it is necessary to first measure the resistance value between the flanges or threaded connections of each section of pipe. If the measurement shows that the resistance value is greater than 0.03Ω, it is necessary to install wires for bridging in order to meet the requirements for static electricity grounding, ensuring good electrical conductivity between various sections of the pipeline and preventing the risk of sparks or explosions caused by static electricity accumulation. The specific workflow may be as follows: 1. Use professional resistance testing equipment to measure the resistance value between each pair of flanges or threaded connections on the pipes installed in the production workshop. 2. Record the test data; if the test results show that the resistance value is below 0.03Ω, it indicates that the conductivity at that location meets the requirements, and no additional bypass wires are needed. 3. If the resistance value between a pair of flanges or threaded connectors exceeds 0.03Ω, it is necessary to prepare bypass materials and arrange for the installation of bypass wires. 4. After installing the jumper wires, the resistance value should be tested again to ensure that it meets the required specifications after the jumpers are in place. 5. If the resistance values between all flanges or threaded joints are within the specified range, then the pipeline’s static grounding system can be considered satisfactory. Therefore, the installation of the jumper wires is indeed determined based on the results of the resistance test. Such an approach ensures the rational use of resources and manpower, avoiding unnecessary waste of materials and workload. At the same time, this is also one of the important measures to ensure the safety of the production workshop. .
Resistance measurement is definitely the most troublesome part; the practical approach is to simply buy ready-made jumper wires online, without the need to fabricate them manually, and their installation is very simple
Which friend needs an antistatic skeleton composite tube? :handshake
Removing pipes, replacing valves, and changing gaskets all have an impact; it’s not possible to conduct tests after each removal – that would be a waste of time. It’s better to put everything back in place; jumper wires don’t cost much at all
In some factories, in fact, all the flanges are equipped with anti-static bonding
It’s basically a common practice; after all, you can’t have the department come for an inspection and find that no static discharge bonding has been installed. If they measure on-site, what will you show them? And if they insist on checking how your resistance measurement records were taken, isn’t that just creating trouble for yourself?
When a metal flange is fastened with metal bolts or clamps, it is generally not necessary to install additional electrostatic connection wires, but it is essential to ensure that there is good electrical contact between at least two of the bolts or clamps. (SH 3097-2000)