Is it necessary to use a bypass for metal pipe flange connections (with more than 4 screws)?
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We are following the new specifications to operate the workshop, but the manager and the electrical and instrumentation team insist that everything must be connected, which puts us in a difficult position.
Current standards require connections; indeed, there is too much backlog from the past
It’s generally not necessary to connect it, but since the new regulations require it, then go ahead and connect it. According to the guidelines, it is recommended to connect it; perhaps after research by many experts, it was determined that connecting it yields better results than not doing so, so we will go with that approach, as the results will definitely be good.
Section 5.1 of the \"Regulations for Static Electricity Safety Inspections in Chemical Enterprises\" stipulates as follows: \"When metal equipment is connected to other metal equipment, or pipes are connected to each other using metal flanges, it is not necessary to use additional bonding wires.\" But there must be more than two bolts for connection. ” SH3097－2000 \"Code for Design of Static Grounding in Petrochemical Industries\" 4.3.3 When metal flanges are fastened using metal bolts or clamps, it is generally not necessary to install additional static connection wires; however, it is essential to ensure that there is good electrical contact between at least two of the bolts or clamps. Code for Lightning Protection of Petroleum and Petroleum Facilities 4.6.1: The oil pipelines can be used as their own lightning arresters, and metal bonding wires shall be installed at the connections of their flanges and valves. When the flange is connected using 5 or more bolts, it is not necessary to use a metal wire for bridging, but an electrical path must still be established. Clause 10.3.3 of the \"Code for Design and Construction of Automobile Fueling and Gas Filling Stations\" GB 50156--2002 (2006 edition) specifies that bridging is required when there are no more than 5 bolts. Note: This content is reproduced from: http://bbs.hcbbs.com/thread-647536-1-5.html, author: lyhh9024
All the flanges in our company need to be connected.
The static grounding specifications state that at least two bolts must have good conductive contact surfaces, but who can guarantee that? Especially carbon steel flanges. So, static bonding still needs to be done
Some require it, while others don’t
In actual production, it is generally not done; in our factory, we only connect such connections for hazardous gases like hydrogen. Normal material pipelines are not bridged. The extra 4 bolts in the specification should also not require a bypass connection. Jumpers are only required for special materials that have such requirements
How is it connected? Are there any photos from the scene? Can I send some to take a look? 》Thank you